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News

Lake Monona and Downtown Madison

On-the-ground action

Since its 2010 founding, Clean Lakes Alliance has been a catalyst to advance new ideas and approaches for phosphorus reduction, successfully getting practices on the ground faster than ever before.

Clean Lakes Alliance Logo

Accomplishment Timeline

Clean Lakes Alliance’s Role

Plant Native Vegetation - Top 10 Ways to Help the Lakes

Resilient Landscapes Initiative (2020)

Initiative to engage the community to take action at their homes to improve water quality in our lakes.

Clean Lakes Alliance organized a coalition of partners to promote Top 10 Resilient Landscapes Actions to do at home, and engaged the community to participate and share the actions they took. (Read more)

Lake Kegonsa Cyanobacteria, September 2018

Advanced the Yahara CLEAN Compact (2020)

The Yahara CLEAN Compact is a community action plan for phosphorus reduction.

Clean Lakes Alliance grew membership in the Yahara CLEAN Compact and continued serving as lead project manager. (Read more)

Pheasant Branch Conservancy Expansion - Acker Farm

Seed the Need Campaign (2020)

Seed the Need campaign to restore the 160-acre Acker Farm to a “platinum prairie.”

Clean Lakes Alliance partnered with Dane County, Friends of Pheasant Branch Conservancy, City of Middleton, The Nature Conservancy, and Hy Cite Enterprises on a fundraising campaign.

Frozen Assets View of the Ice 2020

Frozen Assets raises $1.2 million (2020)

Every year, the Frozen Assets Festival & Fundraiser raises the profile of our lakes as one of our community’s greatest assets.

With over 10,000 attendees in 2020, Frozen Assets raised more than $130,000 for our lakes! Since 2012, Frozen Assets has raised $1,200,000 for lake improvement projects, educational programs, and water quality monitoring.

2019 Community Breakfast - Guests on stage

Yahara CLEAN Compact (2019)

Community action plan for phosphorus reduction (Read more)

Clean Lakes Alliance is leading the effort to form the Yahara CLEAN Compact to align partner efforts around an ambitious but achievable action strategy for achieving water quality goals

Pheasant Branch Conservancy

$1,100,000 in grants awarded (2019)

Since 2011, Clean Lakes Alliance has provided more than $1.1 million in lake project support. (Read more)

In 2019, Clean Lakes Alliance passed the $1,100,000 mark in grants awarded to support lake improvement projects, educational programming, and water quality monitoring

LDMI - Used in Oregon, WI

Sustainable agricultural practices (2019)

Sustainable farming practices can help control manure runoff and reduce the amount of algae-causing phosphorus that reaches our lakes

Worked with the agricultural community to promote sustainable farming practices, such as conservation buffer strips and low-disturbance manure injection that support healthy soil and healthy lakes

James Madison Park

James Madison Park Master Plan (2018)

City of Madison public process for the redesign of this central downtown park on Lake Mendota

Successfully advocated for lake-protection components in the master plan, including an engineered emergent wetland, rain gardens, and bioswales for stormwater control

Carp Barrier

Carp harvests & spawning barriers (2018)

Carp control projects that help prevent the re-suspension of phosphorus-laden lakebed sediment (Read more)

Funded the removal of carp from Lake Kegonsa; introduced the method of in-stream bubble curtains to restrict access to spawning areas on Pheasant Branch Creek and funded a project feasibility study

Learn more about the carp removal project

Leaf Management

Leaf-management credits (2017-Present)

Stormwater permit incentive for municipalities to begin or enhance leaf-collection efforts (Read more)

Funded and advised on research quantifying the water quality impacts of fall leaf debris in the street, leading to Wisconsin DNR approval of phosphorus crediting for leaf collection for municipalities

Manure Injection

Low-disturbance manure injection (2017-Present)

Specialized equipment used to inject liquid manure 3-6″ below the soil surface to reduce the risk of runoff (Read more)

Co-funded the purchase of a vertical manure injector that is rented out to area farmers, helping keep manure in the soil and out of our lakes

Learn more about LDMI

Manure Composting

Manure composting (2016-Present)

Treatment process that converts raw manure into a product that is easier to handle and safer to apply (Read more)

Provided funding to start and expand a pilot to explore the water quality impacts of manure composting; showcased how it improves the timing of field applications to limit runoff

Harvestable Buffers

Harvestable buffers (2016-Present)

Minimum 30′ strips of perennial grass between farm fields and streams to capture sediment and phosphorus (Read more)

Funded the County’s purchase and deed recording of 15-year easements on 3.4 stream miles of vegetated stream buffers, and raised funds to acquire additional miles for 2019

Learn more about buffer strips

Rake for our Lakes garbage truck wrap

Rake-for-the-Lake Pilots (2015-Present)

Community initiatives to get residents to rake leaves out of the street gutter (Read more)

Implemented behavior-change campaigns to motivate resident participation in keeping streets leaf-free within the Village of DeForest and City of Madison (Read more)

Land acquisition map

Land acquisition (2013)

Conservation land set aside in the headwaters of the Yahara River Watershed

Aided Dane County in negotiating the purchase of conservation land adjacent to Dorn Creek north of Lake Mendota, which also served as a “Suck the Muck” staging area

Aerial Seeding

Aerial seeding of cover crops (2013)

Seeding fields from planes after the fall harvest to establish temporary groundcovers that reduce soil erosion

Used innovative aerial seeding techniques to plant cover crops on 2,375 acres of farmland in partnership with Yahara Pride Farms, the first time this had been attempted in the watershed (and since expanded to additional acres)

Yahara CLEAN

Yahara CLEAN roadmap (2012-Present)

Lake cleanup plan outlining 14 actions to reduce phosphorus loading by 50%, the amount needed to double the number of days our lakes are clear

Assembled a coalition of engineers, scientists, and government partners to develop and coordinate the implementation of the Yahara CLEAN Strategic Action Plan for Phosphorus Reduction

Clean Lakes Alliance community board

Alum Treatments

Compound added to stormwater ponds to settle out sediment and phosphorus before it reaches the lakes

Convened out-of-state experts to catalyze action for alternative phosphorus-reduction strategies, such as alum, which were later adopted by City of Madison and other communities

Yahara Pride Farms

Yahara Pride Farms (2011-Present)

Farmer-led nonprofit working to promote the adoption of conservation practices within the watershed

Founded and incubated this farmer-led organization, investing more than $500,000 to-date to help expand the group’s reach and impact

Stormwater pond

Stormwater ponds (2010, 2013)

Treatment ponds designed to capture sediment and phosphorus in runoff before these pollutants enter the lakes

Funded the design and installation of treatment ponds in Middleton (Lakeview Park on Lake Mendota) and Stoughton (farm property on Lake Kegonsa)

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Clean Lakes Alliance in the news

Since Clean Lakes Alliance was founded in 2010, we have advanced new ideas and approaches to phosphorus reduction. Our goal is to raise community awareness of the issues facing the watershed, advocate for the welfare of our lakes, and help procure the necessary funding to clean and protect these waterways.

Clean Lakes Alliance strives to connect the community to our lakes through distribution of news, science, and other important topics facing our watershed. Here are some of the ways Clean Lakes Alliance has recently connected the community with important lake and watershed topics.

WKOW27 29July2020

Keeping our beaches safe in a pandemic

Beaches are a great way to get out of the house during a pandemic, but water quality concerns are closing some of those beaches. Clean Lakes Alliance talks about prevention being the key to keeping those beaches open in the future. Click here to visit the entire story published by WKOW27 on July 29, 2020.

WPR 16June2020

First cyanobacteria blooms of the season

According to predictions from the University of Wisconsin-Madison, 2020 is expected to have higher than average levels of cyanobacteria in the Yahara lakes. Clean Lakes Alliance explains what conditions cause cyanobacteria (blue-green algae) to form in our waters. Click here to read the entire story published by Wisconsin Public Radio on June 16, 2020.

WISC 4June2020

Loop the Lake is going virtual!

Our annual Loop the Lake Bike Ride is going virtual this year due to COVID-19. Bike, walk, swim, or paddle anywhere and anytime to raise funds for our lakes. Funds raised will help support water quality monitoring, lake improvement projects, and educational programming. Hear more about Loop the Lake on WISC-TV3.

WKOW27 15April2020

Help the lakes from your home

In light of next week’s Earth Day, Clean Lakes Alliance released a list of ten ways to help the lakes from your home. Read more in the story published by WKOW about how you can help our lakes through ten simple actions.

WISC 5Feb2020

Celebrate our lakes at the Frozen Assets Festival

Join us for this year’s 6th annual Frozen Assets Festival. The free festival is open to children and adults, and raises funds for our lakes. Hear more about the festival on WISC-TV3.

WISC 12Aug2019

Dog nearly dies after swimming in lagoon

A dog became sick with symptoms of cyanobacteria (blue-green algae) exposure after swimming in a lagoon near Tenney Park. The dog was treated by a veterinarian and survived. Clean Lakes Alliance warns people to keep themselves and their pets out of any water that has a paint-like scum on top, or water that appears unsafe. Click here to visit the entire story published by Channel3000 on August 12, 2019.

WISC 2Aug2019

A summer of frequent cyanobacteria blooms

A cyanobacteria bloom closed swim access on Lake Mendota near the Memorial Union. Emily Stanley of the UW Center for Limnology talks about the trend of frequent cyanobacteria blooms this summer. Clean Lakes Alliance weighs in on what the community can do to help improve lake health. Click here to visit the entire story published by Channel3000 on August 2, 2019.

WKOW 2Aug2019

Lake health ahead of the CrossFit Games

A large cyanobacteria bloom reported on Lake Mendota near the Wisconsin Union Terrace has people worried about lake health. The CrossFit Games are scheduled to take place on Lake Monona and near the Monona Terrace, but water safety is still being closely monitored. Click here to visit the entire story published by WKOW on August 2, 2019.

WISC 15July2019

Updating Yahara CLEAN

Yahara CLEAN is a community partnership working to reduce phosphorus loading to our lakes in an effort to improve water quality. Clean Lakes Alliance is working to update the Yahara CLEAN Compact to account for a changing climate and cost changes. Read more about Yahara CLEAN. Click here to visit the entire story published by Channel3000 on July 15, 2019.

WISC 5July2019

Improving lake health and keeping our beaches open

WISC/Channel3000 explored the health of our Yahara lakes and how to keep them healthy this summer. Clean Lakes Alliance explained the importance of small efforts throughout the community, which will improve lake health. Click here to visit the entire story published by Channel3000 on July 5, 2019.

WKOW27 2July 2019

Cyanobacteria becoming more prevalent, but Clean Lakes Alliance is taking action

WKOW took a look at cyanobacteria in the Yahara lakes and whether it’s becoming more common. Clean Lakes Alliance explained what citizens can do to improve lake health. Click here to visit the entire story published by WKOW on July 2, 2019.

WISC 20June2019

Renew the Blue Volunteer Day

Clean Lakes Alliance worked with Lands’ End to Renew the Blue in Pheasant Branch Conservancy. More than 100 Lands’ End employees volunteered to remove invasive plants and plant seeds in an effort to restore the conservancy. Creating a healthier prairie will decrease the amount of runoff to our lakes and improve water quality. Click here to see the entire story published by channel3000 on June 21, 2019.

WKOW discusses the Clean Lakes Alliance, Yahara Lakes 101 discussion about salt use and our lakes

Groups monitoring salt levels in Madison lakes

Every month, Clean Lakes Alliance hosts its Yahara Lakes 101 Science Café presentations for the community. This month, Dr. Hilary Dugan of the UW Center for Limnology discusses salt use and its impact on the Yahara Watershed. Click here to view the entire story published by WKOW on February 13, 2019.

Clean Lakes Alliance appears on WISC - 11Feb2019

Task force working to prevent more catastrophic flooding around Yahara lakes

Channel3000 and WISC take a look at the Dane County task force working to prevent additional flooding around the Yahara Lakes. Clean Lakes Alliance discusses increased infiltration as a way to reduce runoff to our lakes. Click here to view the entire story published by Channel3000 on February 11, 2019.

NBC15-27Jan2019

A look inside the Frozen Assets Festival

Clean Lakes Alliance previews the Frozen Assets Festival, which takes place at The Edgewater and Lake Mendota February 1-3, 2019. The Festival is a FREE family-friendly event in which people can celebrate our community’s number one asset – OUR LAKES! Click here to view the entire story published by WMTV NBC15 on January 27, 2019.

WMSN FOX47-27Jan2019

Salt usage and our lakes

Clean Lakes Alliance talks about keeping our lakes healthy year-round by monitoring wintertime salt usage. Too much salt can disrupt fish and plant life. Click here to view the entire story published by WMSN FOX47 on January 27, 2019.

Channel 3000 06Jan2019

Winter runoff is problematic for the lakes

Clean Lakes Alliance speaks about the winter’s warm temperatures, reduced snow, increased rainfall, and the resulting problems being felt by our lakes. Click here to view the entire story published by Channel3000 on January 6, 2019.

Channel3000 17Dec2018

Lake Mendota is officially iced over

Despite the recent warm weather in Madison, Lake Mendota is officially frozen over. The Wisconsin State Climatology Office declared Lake Mendota iced over on December 15, 2018. Click here to view the entire story published by Channel3000 on December 17, 2018.

Madison Commons 14 Dec2018

High lake levels; bracing for ice damage

Madison residents braved rainy and wet conditions to take part in the Flood Clean-up Challenge hosted by the City of Madison Parks Division. Clean Lakes Alliance discusses the high water levels and how our lakes are being impacted. Click here to view the entire story published by Madison Commons on December 14, 2018.

NBC15 13Dec2018

There is still time to enter the Mendota Freeze Contest

Winter is almost here, and temperatures are getting colder. Clean Lakes Alliance has kicked off its 7th annual Mendota Freeze Contest asking the community to guess when Lake Mendota will freeze. The contest winner will take home a $1,000 gift card from Lands’ End. Click here to view the entire story published by WMTV NBC15 on December 13, 2018.

 

Clean Lakes Alliance in the news

Since Clean Lakes Alliance was founded in 2010, we have advanced new ideas and approaches to phosphorus reduction. Our goal is to raise community awareness of the issues facing the watershed, advocate for the welfare of our lakes, and help procure the necessary funding to clean and protect these waterways.

Clean Lakes Alliance strives to connect the community to our lakes through distribution of news, science, and other important topics facing our watershed. Here are some of the ways Clean Lakes Alliance has recently connected the community with important lake and watershed topics.

WKOW27 29July2020

Keeping our beaches safe in a pandemic

Beaches are a great way to get out of the house during a pandemic, but water quality concerns are closing some of those beaches. Clean Lakes Alliance talks about prevention being the key to keeping those beaches open in the future. Click here to visit the entire story published by WKOW27 on July 29, 2020.

WPR 16June2020

First cyanobacteria blooms of the season

According to predictions from the University of Wisconsin-Madison, 2020 is expected to have higher than average levels of cyanobacteria in the Yahara lakes. Clean Lakes Alliance explains what conditions cause cyanobacteria (blue-green algae) to form in our waters. Click here to read the entire story published by Wisconsin Public Radio on June 16, 2020.

WISC 4June2020

Loop the Lake is going virtual!

Our annual Loop the Lake Bike Ride is going virtual this year due to COVID-19. Bike, walk, swim, or paddle anywhere and anytime to raise funds for our lakes. Funds raised will help support water quality monitoring, lake improvement projects, and educational programming. Hear more about Loop the Lake on WISC-TV3.

WKOW27 15April2020

Help the lakes from your home

In light of next week’s Earth Day, Clean Lakes Alliance released a list of ten ways to help the lakes from your home. Read more in the story published by WKOW about how you can help our lakes through ten simple actions.

WISC 5Feb2020

Celebrate our lakes at the Frozen Assets Festival

Join us for this year’s 6th annual Frozen Assets Festival. The free festival is open to children and adults, and raises funds for our lakes. Hear more about the festival on WISC-TV3.

WISC 12Aug2019

Dog nearly dies after swimming in lagoon

A dog became sick with symptoms of cyanobacteria (blue-green algae) exposure after swimming in a lagoon near Tenney Park. The dog was treated by a veterinarian and survived. Clean Lakes Alliance warns people to keep themselves and their pets out of any water that has a paint-like scum on top, or water that appears unsafe. Click here to visit the entire story published by Channel3000 on August 12, 2019.

WISC 2Aug2019

A summer of frequent cyanobacteria blooms

A cyanobacteria bloom closed swim access on Lake Mendota near the Memorial Union. Emily Stanley of the UW Center for Limnology talks about the trend of frequent cyanobacteria blooms this summer. Clean Lakes Alliance weighs in on what the community can do to help improve lake health. Click here to visit the entire story published by Channel3000 on August 2, 2019.

WKOW 2Aug2019

Lake health ahead of the CrossFit Games

A large cyanobacteria bloom reported on Lake Mendota near the Wisconsin Union Terrace has people worried about lake health. The CrossFit Games are scheduled to take place on Lake Monona and near the Monona Terrace, but water safety is still being closely monitored. Click here to visit the entire story published by WKOW on August 2, 2019.

WISC 15July2019

Updating Yahara CLEAN

Yahara CLEAN is a community partnership working to reduce phosphorus loading to our lakes in an effort to improve water quality. Clean Lakes Alliance is working to update the Yahara CLEAN Compact to account for a changing climate and cost changes. Read more about Yahara CLEAN. Click here to visit the entire story published by Channel3000 on July 15, 2019.

WISC 5July2019

Improving lake health and keeping our beaches open

WISC/Channel3000 explored the health of our Yahara lakes and how to keep them healthy this summer. Clean Lakes Alliance explained the importance of small efforts throughout the community, which will improve lake health. Click here to visit the entire story published by Channel3000 on July 5, 2019.

WKOW27 2July 2019

Cyanobacteria becoming more prevalent, but Clean Lakes Alliance is taking action

WKOW took a look at cyanobacteria in the Yahara lakes and whether it’s becoming more common. Clean Lakes Alliance explained what citizens can do to improve lake health. Click here to visit the entire story published by WKOW on July 2, 2019.

WISC 20June2019

Renew the Blue Volunteer Day

Clean Lakes Alliance worked with Lands’ End to Renew the Blue in Pheasant Branch Conservancy. More than 100 Lands’ End employees volunteered to remove invasive plants and plant seeds in an effort to restore the conservancy. Creating a healthier prairie will decrease the amount of runoff to our lakes and improve water quality. Click here to see the entire story published by channel3000 on June 21, 2019.

WKOW discusses the Clean Lakes Alliance, Yahara Lakes 101 discussion about salt use and our lakes

Groups monitoring salt levels in Madison lakes

Every month, Clean Lakes Alliance hosts its Yahara Lakes 101 Science Café presentations for the community. This month, Dr. Hilary Dugan of the UW Center for Limnology discusses salt use and its impact on the Yahara Watershed. Click here to view the entire story published by WKOW on February 13, 2019.

Clean Lakes Alliance appears on WISC - 11Feb2019

Task force working to prevent more catastrophic flooding around Yahara lakes

Channel3000 and WISC take a look at the Dane County task force working to prevent additional flooding around the Yahara Lakes. Clean Lakes Alliance discusses increased infiltration as a way to reduce runoff to our lakes. Click here to view the entire story published by Channel3000 on February 11, 2019.

NBC15-27Jan2019

A look inside the Frozen Assets Festival

Clean Lakes Alliance previews the Frozen Assets Festival, which takes place at The Edgewater and Lake Mendota February 1-3, 2019. The Festival is a FREE family-friendly event in which people can celebrate our community’s number one asset – OUR LAKES! Click here to view the entire story published by WMTV NBC15 on January 27, 2019.

WMSN FOX47-27Jan2019

Salt usage and our lakes

Clean Lakes Alliance talks about keeping our lakes healthy year-round by monitoring wintertime salt usage. Too much salt can disrupt fish and plant life. Click here to view the entire story published by WMSN FOX47 on January 27, 2019.

Channel 3000 06Jan2019

Winter runoff is problematic for the lakes

Clean Lakes Alliance speaks about the winter’s warm temperatures, reduced snow, increased rainfall, and the resulting problems being felt by our lakes. Click here to view the entire story published by Channel3000 on January 6, 2019.

Channel3000 17Dec2018

Lake Mendota is officially iced over

Despite the recent warm weather in Madison, Lake Mendota is officially frozen over. The Wisconsin State Climatology Office declared Lake Mendota iced over on December 15, 2018. Click here to view the entire story published by Channel3000 on December 17, 2018.

Madison Commons 14 Dec2018

High lake levels; bracing for ice damage

Madison residents braved rainy and wet conditions to take part in the Flood Clean-up Challenge hosted by the City of Madison Parks Division. Clean Lakes Alliance discusses the high water levels and how our lakes are being impacted. Click here to view the entire story published by Madison Commons on December 14, 2018.

NBC15 13Dec2018

There is still time to enter the Mendota Freeze Contest

Winter is almost here, and temperatures are getting colder. Clean Lakes Alliance has kicked off its 7th annual Mendota Freeze Contest asking the community to guess when Lake Mendota will freeze. The contest winner will take home a $1,000 gift card from Lands’ End. Click here to view the entire story published by WMTV NBC15 on December 13, 2018.

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Lake Mendota Ice

This is the start of something big

A message from Clean Lakes Alliance Executive Director, James Tye

Dear Friends,

As we close the books on a difficult year for our lakes, I want to take a moment to reflect on what went well, and what we can do to start 2019 off in the right direction.

Read More

Friends of Clean Lakes sign at Shoreline Swim

A busy summer for our lakes

Summer in Madison would not be the same without our lakes. This year, especially, we’ve seen our lakes at their best and their worst due to record rain events, cyanobacteria blooms, and beach closures. Here at Clean Lakes Alliance, the summer is a time to get out and enjoy our lakes while also doubling down on our efforts to protect them. From innovative grant projects, to county policy recommendations, to record-setting engagement, we’ve been hard at work for our lakes this summer, and so have you! Let’s take a look back at some highlights from this lake season.

Read More

Raking

Can garbage trucks help protect our lakes?

A partnership toward leaf management

Clean Lakes Alliance is excited to partner with the City of Madison for this month’s Clean Lakes Grant.

Leaf management is a crucial step toward reducing the amount of phosphorus that reaches our lakes. Through a Clean Lakes Grant awarded for 2018, the City of Madison is working to promote leaf management and leaf-free streets. Clean Lakes Alliance has contributed $4500, which will leverage a $9300 total project budget.

The City of Madison paired with the United States Geological Survey (USGS) to monitor phosphorus in the City’s storm drainage system. The study shows a direct correlation between the mass of leaves in the street and the amount of phosphorus reaching our lakes.

Read More

Clean Lakes Alliance strives to build a community of people working to improve and protect water quality in the Yahara River Watershed. Learn more about our programs!

Yahara Watershed Academy

This course provides students with the knowledge, tools, leadership skills, and connections needed to meet today’s land and water conservation challenges.

Yahara Watershed Academy - Feb 2019
Yahara Watershed Academy

Water quality monitoring

Our team of trained volunteers gather data on water clarity and temperature, observe beach conditions, and identify potentially harmful blue-green algal blooms. Learn about our citizen water quality monitoring program.

Water Quality Monitoring
Water quality monitor uses a turbidity tube to test for lake water clarity

Lake Explorer Camp

Every summer, Clean Lakes Alliance partners with Madison Boats and the Boys & Girls Club of Dane County to give local kids a “crash course” in lake education and recreation. Learn more about the Lake Explorer Camp.

Lake Explorer Camp 2017 Group
Lake Explorer Camp, 2017

Renew the Blue Volunteer Days

Clean Lakes Alliance partners with local businesses and host site partners to conduct meaningful and rewarding volunteer days at lakeside parks and natural areas. Learn more about our volunteer days.

CG Schmidt Volunteer Day
CG Schmidt Volunteer Day

Back to the Beach

Clean Lakes Alliance is working to reignite community passion for our beaches and reimagine them as showcases for sustainability, function, and natural beauty. 

back to the beach sandcastle building

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E. coli and beach pathogens

Our public beaches offer vital access points for the community to enjoy our cherished lakes. Unfortunately, unsafe water conditions can prevent their safe use and enjoyment. The two most common reasons for beach closures are elevated concentrations of E. coli and/or cyanobacteria (blue-green algae) blooms. Below, we specifically discuss E. coli and what it means for our lakes and beaches. 

What is E. coli?

Escherichia coli, known as E. coli, is a common bacterium easily grown in a laboratory, making it one of the most-studied bacteria today. There are many different strains of E. coli, some of which can cause serious illness. Humans and all warm-blooded animals have E. coli strains living harmlessly in our lower intestine to aid in digestion. When we talk about the presence of E. coli at the beach, we are usually talking about these harmless strains, but that can indicate the likely presence of disease-causing organisms.

ecoli-bacteria-creditGerdAltmann-Pixabay
E. coli bacteria, Credit Gerd Altmann (Pixabay)

Why are our beaches tested for E. coli?

All warm-blooded animals have some E. coli living in their lower intestines and found in their feces. While E. coli is not likely to cause illness on its own, it is relatively easy to detect in the lab, making it a useful biological indicator of contamination. If a water sample has high concentrations of E. coli, other more dangerous and infectious organisms may be present. While most E. coli strains are harmless, their presence can mean that illness-causing pathogens are also present.

Because of the risk posed to public health, one of the primary reasons for beach closures is when elevated levels of E. coli are detected. Those who are most at risk to develop illness are children, the elderly, and people with compromised immune systems. Healthy individuals who get an infection will normally not develop serious problems and recover on their own with rest and drinking plenty of fluids. Unfortunately, those at higher risk can develop more severe illnesses.

Note: “Swimmer’s itch” is often incorrectly attributed to E. coli exposure, when in fact it is caused by microscopic parasites that thrive in waterfowl and freshwater mollusks.

Beaches closed
Beach closure sign posted on lifeguard stand

What are the risks of swimming in contaminated waters?

High counts of E. coli indicate that the water is likely to be contaminated by feces, increasing the risk of exposure to pathogens that can cause illness. As mentioned earlier, young children, the elderly, and those with compromised immune systems are considered most vulnerable.

The most common symptoms of exposure are general gastrointestinal discomfort and skin rashes, and eye and ear infections. Some strains can cause other severe and even life-threatening complications, such as bloody diarrhea, kidney failure, and (in rare cases) death. Most cases of illness resulting from swimming in contaminated water are unpleasant but mild, and do not require medical treatment. However, consult with your physician if symptoms are severe or persist.

e-coli-symptoms-diagnosis-treatment-JRBee-VerywellHealth
E. coli symptoms (Image credit JR Bee, Verywell Health, 18April2020)

What causes high E. coli levels at the beach?

High E. coli levels can occur for several reasons. Commonly, large rainstorms will wash dog or bird  (especially geese and seagull) feces into the water, carrying pathogens with them. Raccoons that may be living in storm sewers can be a source of E. coli-containing feces, as can farm-manure runoff. Finally, aging sanitary sewer pipes and other wastewater infrastructure can leak sewage that then makes its way into our lakes.

Complicating the picture, microbes can survive and sometimes reproduce outside of animal hosts, such as in lake and streambed sediments or in beach sand. This makes it difficult to determine how and when a sampling site was contaminated. Genetic sequencing can help identify the animal source, but the tests remain relatively cost prohibitive to be conducted on a regular basis.

What beaches are tested?

The following Madison-area beaches are tested on a weekly basis by Public Health Madison & Dane County: BB Clarke Beach, Bernie’s Beach, Brittingham Beach, Esther Beach, Frost Woods Beach, Goodland County Park, James Madison Beach, Lake Mendota County Park, Maple Bluff Beach Park, Marshall Beach, Memorial Union Pier, Olbrich Beach, Olin Beach, Schluter Beach, Spring Harbor Beach, Tenney Beach, Vilas Beach, Warner Beach, and Hudson Park Lake Access Point.

Madison-area beaches and testing agencies

LAKEBEACHESTESTED BY
MendotaJames Madison, Lake Mendota County Park, Maple Bluff, Marshall, Memorial Union, Spring Harbor, Tenney, Warner ParkPublic Health Madison & Dane County
MendotaGovernor Nelson State ParkWisconsin DNR
MononaBB Clarke, Bernie’s, Brittingham, Esther, Frost Woods, Hudson, Olbrich, Olin, SchluterPublic Health Madison & Dane County
WaubesaGoodland, McDanielPublic Health Madison & Dane County
WingraVilasPublic Health Madison & Dane County
KegonsaKegonsa State Park Wisconsin DNR

If a water sample is found to contain E. coli above a specific public-health threshold (1,000 MPN/100 mL), then the beach is closed and sampled every day until concentrations fall below that threshold. At that point, the beach is then reopened.

Thee are also two State-owned beaches, located at Lake Kegonsa State Park and Governor Nelson State Park, that are tested for E. coli by the Wisconsin Department of Natural Resources on Monday through Thursday.

Water sample threshold

Threshold typeLevel of E. coli presence (CFU of E. coli/100 mL)Gastrointestinal illness cases per 1,000 water usersSafe to swim?Action taken by professionals in the field
Low235~8Caution warrantedPost advisory signs
Medium235-1,0008-14High caution warrantedPost advisory signs
High (Critical)>1,00014No swimmingImmediately convey the closure of the beach
(dnr.wisconsin.gov and US EPA, 1983, 1984, 1986, 2002)

Standard sampling methods take several hours to complete, so it is not possible to report E. coli levels on the same day the sample is collected. This delay presents a challenge for public health officials and beach managers who have to balance the risk of potential exposure against lost opportunities to access the beach. Models can be developed for individual beaches to predict the next day’s E. coli levels (based on variables like rainfall, temperature, and previous bacteria counts), but they do not always provide acceptable levels of accuracy.

How can I avoid illness?

Take the following precautions to reduce your risk of exposure once you are at the beach:

  • Look for signage indicating water quality advisories or beach closures
  • Never swim at a beach that is closed
  • Avoid swimming in murky water where you cannot see your toes at knee-depth
  • Wait 24 hours after heavy rain before heading to the beach
  • Check beach closures and water clarity reports at lakeforecast.org
  • Never swallow lake water and make sure children understand this as well

Where should I go to find out whether a beach is closed?

Visit lakeforecast.org (also a free app for your smartphone) or the Public Health Madison & Dane County website to find out which beaches are open or closed. You can also subscribe to PHMDC email alerts on beach closures.

If one beach is closed, should others be closed?

Not necessarily. Beach water quality problems are often localized because our lakes are so large. A number of beaches tend to experience high E. coli after a large rainstorm when contaminants on land can be quickly delivered to the lake.

Some beaches may be more vulnerable to contamination because of water circulation patterns, beach design, surrounding land use (such mowed grass fields that may attract geese), and nearby stormwater outfalls. Since our lakes are very dynamic, even two nearby beaches can experience different water quality conditions at any given point in time.

 

BeachClosed_Bacteria
Public Health Madison and Dane County beach closure sign

What can be done to reduce E. coli levels at beaches?

The best solution is to prevent contaminated runoff from entering our lakes in the first place. This means addressing problems at the source: picking up pet waste, discouraging seagulls and geese from congregating near the water, preventing manure runoff, and detecting and fixing leaky sanitary sewers.

Beach managers often take action to deter congregating waterfowl. These actions include replacing lawns with taller native grasses and wildflowers near the water’s edge, erecting geese barriers, and raking sand to remove feces and expose bacteria to sunlight. Diverting potentially contaminated stormwater into rain gardens or retention ponds is another good practice. This helps the water soak into the ground than runoff into the lakes.

Clean Lakes Alliance promotes these actions, partners with local organizations to help farmers reduce manure runoff, and advocates for smart beach design, including features like native vegetated buffers. Native plantings help absorb and filter runoff before it reaches the lakes, and are effective at discouraging geese that favor clear sight lines to the water.

Dane County has also installed “Clean Beach Corridors” at several county parks. These chemical-free treatment systems filter lake water through sand, expose it to pathogen-killing ultraviolet light, and then return the water to the designated swimming area.

Pick up pet waste to help our lakes
Pick up pet waste to help our beaches and lakes

How can I help?

  • Pick up after your dog and encourage others to do the same
  • Build a pollinator-friendly rain garden to catch stormwater runoff at your home
  • When at the beach or a park, refrain from feeding wildlife like geese and ducks. Feeding encourages them to congregate and disrupts their natural foraging behaviors.
  • Keep sanitary sewers in good working condition by only flushing toilet paper. If you have a septic system, schedule regular maintenance. 
  • Support community plans to incorporate “green infrastructure,” such as rain gardens and water-permeable hardscapes, into street reconstructions and park designs

To report a suspected problem:

  • Public Health Madison & Dane County at 608-243-0356 for the following beaches: BB Clarke Beach, Bernie’s Beach, Brittingham Beach, Esther Beach, Frost Woods Beach, Goodland County Park, Hudson Park Lake Access Point, James Madison Beach, Lake Mendota County Park, Marshall Beach, Memorial Union Pier, Olbrich Beach, Olin Beach, Schluter Beach, Spring Harbor Beach, Tenney Beach, Vilas Beach, and Warner Beach.
  • Wisconsin DNR Office of Great Waters at 608-266-1926 for the following beaches: Governor Nelson State Park Beach and Lake Kegonsa State Park Beach.
  • Village of McFarland at 608-838-3153 for McDaniel Beach.
  • Village of Maple Bluff at 608-244-3048 for Maple Bluff Beach Park.

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About the Clean Lakes Community Awards

The Clean Lakes Community Awards recognizes the outstanding accomplishments of individuals, volunteers, businesses, farmers, and other groups working to protect our Yahara lakes. The awards honor the dedication of individuals and groups making a difference in our watershed.

Award Categories

  • New Lake Partner of the Year (business/organization): A new Lake Partner for Clean Lakes Alliance showing a level of commitment that goes beyond a first-time financial contribution.
  • Volunteer of the Year (individual/group): A dedicated individual or group of volunteers working to restore and preserve our Yahara lakes.
  • Lake Leadership (individual/group): An individual or business, government entity, or organization leading by example and demonstrating their commitment to being a catalyst for healthy lakes.
  • Project of the Year (individual/group): An initiative or project that improves the health of the Yahara Watershed
  • Founders Award (individual/business/organization): A devoted individual, business, or organization that has provided foundational support to Clean Lakes Alliance and our Yahara lakes.
Clean Lakes Community Awards
2018 Community Awards

Note: Awards may not be handed out in each category ever year. The selection committee reserves the right to move a nominee to a different category.

Congratulations to our 2020 Clean Lakes Community Awards recipients!

CleanLakesCommunityAwardWinners 2020
2020 Clean Lakes Community Awards Recipients

In addition, we recognized volunteer water quality monitors who have served for five years. Thank you to Kitty Brussock, Ada Hazen, Arlene and Jeff Koziol, Tim Lechmaier, Terri Lefebvre and Joe Campshure, Allan Levin!

Clean Lakes Community Awards History:

  • New Lake Partner of the Year - Patrick Ellestad of Edward Jones
  • Individual Lake Leadership Award - Jackie Hering of the Big Swell Swim series
  • Business Lake Leadership Award - Highland Spring Farm
  • Volunteer of the Year - MSCR Pontoon Program
  • Founders Award - Greg Dombrowski
  • Urban Project of the Year - Trash Talkers
  • Rural Project of the Year - Yahara Pride Farms' manure composting program
  • Lake Champion - Joanna Burish
    In addition, we recognized volunteer water quality monitors who have served for five years. Thank you to Jill Storms Ball, George Benton, Mark Jung, Zak Redding, Kim Sprecher, Janet Van Vleck, and Ken Walz! Read more about our 2019 award recipients.2019 Clean Lakes Community Awards Recipients

    2019 Clean Lakes Community Awards Recipients

  • Lake Stewardship Lumley Leadership Award - Lloyd Eagan
  • Volunteerism Lumley Leadership Award - Marta Gialamas, Chas Martin, and Tina Noel
  • Organizational Commitment Lumley Leadership Award - Madison Metropolitan Sewerage District

Volunteer of the Year - Marilee Gorman

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Volunteers test beaches for E. coli

Once a week during the beach season, Public Health Madison & Dane County tests our beaches for E. coli bacteria, which is an indicator for pathogens that might pose a human health risk.

These tests are important, because they help to close our beaches when it isn’t safe to swim. However, the labor involved with collecting samples and processing them in the lab makes testing expensive. While water conditions may change on a daily or even hourly basis, it usually isn’t feasible to test that frequently.

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Carp Barrier

Can bubble barriers stop carp?

Carp harvesting efforts have been underway for years in the Yahara River watershed, but more could be done to manage the population of invasive fish. In this month’s Clean Lakes Grants spotlight, we’re sharing the efforts of our partners at Friends of Pheasant Branch Conservancy, who are ready to tackle the challenge.

Friends of Pheasant Branch Conservancy is a not-for-profit organization devoted to protecting and restoring Pheasant Branch Conservancy on the northwest shore of Lake Mendota. Through a $8,750 grant awarded for 2018, the group will evaluate the feasibility of installing a new carp “bubble barrier” system on Pheasant Branch Creek to ultimately craft a recommendation and action plan for implementation.

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