Public Service Commission of Wisconsin

Wisconsin water loss

585 systems, 5,765 filed years. Compared against the rest of the state and against each system's own record.

Median loss, FY2025
16.6%
Half of Wisconsin's systems are above this. The 90th percentile is 36.1%.
Too unstable to act on
142
The reported figure moves more than three quarters of the state's do — describing measurement rather than water. Filter to these.

Sort by any column. The cohorts above are filters, not separate lists. This table carries every system in a cohort, plus the 100 with the largest annual cost — 195 of 585. The rest are listed under every system, and every system's own page carries its full filed history.

SystemLoss (FY2025)vs stateMovement/yr
Exeland Municipal Water82.2%100%16.8 pts 14%→84% FY2018
Phillips Municipal77.8%100%16.3 pts 5%→78% FY2025
Coloma Municipal Water71.8%100%6.4 pts 61%→72% FY2025
Westboro San Dist Wtr71.3%99%16.1 pts 16%→71% FY2025
North Cape Sanitary District69.6%99%
Glidden Sanitary District63.8%99%6.9 pts 39%→54% FY2024
Stone Lake Sanitary District63.2%99%8.9 pts 37%→63% FY2025
Potosi Municipal Water59.4%99%5.7 pts 34%→47% FY2018
Goodman Sanitary District #159.1%99%14.8 pts 17%→43% FY2021
Kendall Municipal Water58.2%99%8.2 pts 36%→56% FY2024
St Joseph Sanitary District #156.1%98%3.8 pts 46%→56% FY2025
Bear Creek Water54.6%98%10.7 pts 13%→55% FY2025
Hancock Municipal Water53.8%98%19 pts 25%→54% FY2025
Wabeno Sanitary District No 150.9%98%6.8 pts 32%→51% FY2025
Schofield Municipal Water And Sewer50.6%98%8.5 pts 27%→48% FY2020
Butternut Municipal50.1%98%8.7 pts 19%→42% FY2024
Wheeler Municipal Water49.9%97%9.5 pts 36%→60% FY2017
Manawa Municipal Water49.7%97%9.7 pts 34%→15% FY2019
Star Prairie Municipal Water49.3%97%5.7 pts 76%→61% FY2021
Pepin Municipal Water49.2%97%10.9 pts 28%→51% FY2021
Browntown Municipal Water48.9%97%15.3 pts 49%→76% FY2017
Eagle Municipal Water48.5%96%9.2 pts 21%→39% FY2022
Kellnersville Water48.2%96%4.9 pts 58%→46% FY2021
Columbus Water And Light48.1%96%6.2 pts 15%→36% FY2022
Union Center Water47.6%96%15.9 pts 25%→64% FY2020
Alma Municipal Water47.6%96%19.8 pts 0%→51% FY2019
St Cloud Water And Sewer47.2%96%22 pts 50%→10% FY2017
Mattoon Municipal Water46.8%96%9.1 pts 29%→47% FY2024
Seneca Tn Of Sanitary District 146.8%95%9.9 pts 15%→34% FY2024
Knight Municipal Water45.5%95%12.8 pts 88%→51% FY2019
Evansville Water And Light44.4%95%10.4 pts 12%→35% FY2023
Chetek Municipal Water43.1%95%5.8 pts 28%→44% FY2022
Fox Lake Water43.0%95%5.9 pts 21%→36% FY2020
Glen Flora Water42.5%94%15.6 pts 54%→100% FY2020
La Valle Municipal Water42.3%94%4 pts 40%→32% FY2017
Laona Sanitary District No 142.1%94%10.5 pts 15%→44% FY2023
Frederic Water Commission41.8%94%6.1 pts 27%→42% FY2025
Ridgeway Municipal Water41.5%94%6.9 pts 21%→42% FY2025
Tomahawk Municipal Water And Sewer41.3%94%8.6 pts 3%→44% FY2018
Niagara Municipal Water41.2%93%10.4 pts 50%→20% FY2022
White Lake Water41.2%93%6.5 pts 41%→27% FY2021
Haugen Water41.2%93%7.4 pts 15%→31% FY2021
Cassville Water And Sewer41.0%93%5.1 pts 48%→36% FY2023
Dorchester Water40.0%93%4.4 pts 29%→40% FY2025
Ellsworth Municipal Water And Sewer39.8%93%6.9 pts 12%→40% FY2025
Birnamwood Municipal Water39.3%92%8 pts 10%→37% FY2021
Sheldon Municipal Water39.2%92%6.6 pts 51%→39% FY2025
Phelps Sanitary Dist 138.9%92%9.1 pts 58%→39% FY2025
Dalton Sanitary District38.8%93%7.4 pts 27%→39% FY2018
Gratiot Municipal Water38.5%92%11.9 pts 34%→67% FY2022
Independence Municipal Water38.4%92%5 pts 19%→36% FY2024
Cameron Municipal Water37.8%91%6.2 pts 38%→24% FY2021
Montfort Municipal Water37.5%91%8.8 pts 18%→36% FY2023
Wauzeka Municipal Water37.4%91%10.9 pts 57%→27% FY2023
Gresham Municipal Water And Sewer37.4%91%8.7 pts 41%→19% FY2022
Birchwood Municipal Water36.9%91%14.5 pts 59%→28% FY2017
Brokaw Village Of Water36.8%91%4.2 pts 45%→37% FY2018
Colfax Municipal Water And Sewer36.8%91%3 pts 38%→30% FY2017
Florence Utility Commission36.8%90%5.5 pts 38%→21% FY2018
Waterford Water And Sewer36.5%90%6.4 pts 16%→27% FY2022
Reeseville Water36.3%91%10.5 pts 19%→47% FY2023
Bruce Municipal Water And Sewer36.1%90%5 pts 27%→39% FY2018
Dousman Water35.8%90%4.6 pts 19%→36% FY2025
Darlington Municipal Water And Sewer35.3%90%5.5 pts 10%→25% FY2022
Lawrence Water34.4%90%5.1 pts 11%→32% FY2024
Kimberly Municipal Water34.4%89%4 pts 39%→29% FY2023
Lone Rock33.8%89%15.4 pts 22%→51% FY2017
Delafield Municipal Water33.7%89%4.9 pts 6%→32% FY2024
Genoa Municipal Water And Sewer33.6%89%13.4 pts 30%→8% FY2021
Wilson Municipal Water33.6%89%22.4 pts 75%→14% FY2017
Pigeon Falls Municipal Water33.5%88%2.9 pts 24%→30% FY2023
Thorp Municipal Water And Sewer33.5%88%6.3 pts 15%→24% FY2019
Bloomington Municipal Water33.2%88%8.8 pts 8%→29% FY2024
Galesville Municipal Water And Sewer33.0%88%3.9 pts 12%→27% FY2017
Mondovi Municipal Water And Sewer32.9%88%10.5 pts 27%→53% FY2020
Sussex Water Public32.6%88%2.5 pts 26%→34% FY2024
Sturgeon Bay32.4%87%4.5 pts 16%→25% FY2023
Green Lake Water32.4%87%13.4 pts 7%→32% FY2025
Fountain City Water31.7%87%11 pts 33%→13% FY2022
Dallas Municipal Water31.5%87%6.5 pts 26%→7% FY2020
Amherst Water31.3%87%10.2 pts 0%→21% FY2022
Winneconne Water31.1%86%5.2 pts 39%→25% FY2017
Shorewood Municipal Water31.1%86%4.4 pts 22%→31% FY2025
Gays Mills Municipal Water31.0%86%6.3 pts 21%→36% FY2024
Pulaski30.8%86%6.4 pts 55%→41% FY2021
Eleva Municipal Water30.8%86%7.3 pts 26%→47% FY2022
Hortonville30.7%86%8.1 pts 12%→32% FY2024
Radisson Water And Sewer30.7%85%22.8 pts 83%→5% FY2020
Montello Water30.6%85%5 pts 46%→33% FY2018
Brockway Sanitary District 130.6%85%3.8 pts 8%→21% FY2024
Rice Lake Municipal Water And Electric30.5%85%3.5 pts 38%→32% FY2020
Hilbert Municipal Water30.5%85%7.7 pts 3%→23% FY2022
Bagley Municipal Water30.3%85%7 pts 59%→26% FY2018
Tony Municipal Water30.3%84%16.6 pts 57%→4% FY2020
Hatley Water30.2%86%6.1 pts 45%→25% FY2020
Slinger30.1%84%7.2 pts 11%→30% FY2025
Grand Chute Sanitary District 129.9%84%2.6 pts 24%→34% FY2017
Nelson29.9%84%17.7 pts 55%→20% FY2022
Milwaukee29.6%84%1.7 pts 21%→25% FY2021
Merrill Water29.5%83%5.5 pts 19%→30% FY2025
Park Falls Municipal Water28.9%82%16.2 pts 81%→26% FY2024
Mount Sterling Municipal Water28.7%81%9 pts 25%→46% FY2024
St Croix Improvements Inc28.6%81%12.2 pts 4%→29% FY2025
Rome Water28.6%81%8.2 pts 54%→29% FY2021
Spencer Municipal Water28.0%80%9.9 pts 8%→28% FY2025
Tigerton Municipal Water And Sewer27.5%79%20.1 pts 5%→62% FY2020
Kewaunee Municipal Water27.3%79%8.9 pts 5%→26% FY2023
Land O Lakes Sanitary District No 127.3%79%10.2 pts 2%→30% FY2022
Mercer Sanitary District Number One26.1%78%10.8 pts 56%→26% FY2025
Weyerhaeuser Municipal Water26.1%78%9.4 pts 57%→28% FY2017
Balsam Lake Municipal Water25.4%76%7.9 pts 39%→25% FY2025
South Wayne Municipal Water25.4%76%16.4 pts 42%→5% FY2020
Brownsville Water25.2%75%9.6 pts 34%→17% FY2021
Three Lakes Sanitary District No 124.7%74%22 pts 63%→10% FY2023
Hawkins Municipal Water And Sewer24.5%73%10.7 pts 40%→14% FY2021
Shorewood Hills Water24.0%72%15.4 pts 76%→9% FY2019
Strum Municipal23.9%72%7.8 pts 18%→29% FY2022
Bridgeport Sanitary Dist23.5%71%14.5 pts 36%→74% FY2022
Lyndon Station Municipal Water22.5%69%11.4 pts 14%→48% FY2024
Stitzer Sanitary District22.3%69%12.1 pts 9%→33% FY2020
Highland Municipal Water22.3%68%9.8 pts 9%→35% FY2022
Darien Water Works And21.4%66%9.2 pts 45%→21% FY2017
Iola Municipal Water20.9%65%12.2 pts 19%→2% FY2023
Rewey Municipal Water20.4%63%15.8 pts 54%→19% FY2023
Elmwood Municipal Water20.4%63%7.7 pts 40%→20% FY2024
Lake Como Sanitary District #120.4%63%8.7 pts 2%→20% FY2025
Blanchardville Municipal Water19.9%62%12.8 pts 12%→41% FY2022
Blue River Municipal Water And Sewer19.7%60%7.9 pts 11%→23% FY2024
Downsville Sanitary District No 119.3%58%10.1 pts 55%→23% FY2019
Barneveld Municipal Water19.2%58%8.9 pts 46%→24% FY2021
Rib Lake Water19.2%58%11.1 pts 8%→33% FY2018
Shell Lake Municipal19.2%57%7.9 pts 41%→20% FY2019
Sheboygan Tn Of Sanitary Dist #318.7%56%7.8 pts 28%→13% FY2020
Clinton Municipal18.6%56%10.3 pts 38%→14% FY2019
Glenbeulah Municipal Water18.5%56%15.8 pts 64%→10% FY2020
Bristol Water18.4%55%8.4 pts 42%→22% FY2020
Loganville Municipal Water And Sewer18.1%55%14.7 pts 60%→31% FY2017
Bay City Water17.8%54%11.8 pts 28%→3% FY2023
Durand Municipal Water17.6%53%10.7 pts 42%→19% FY2018
Theresa Municipal Water And Sewer17.4%53%7.8 pts 41%→24% FY2020
Drummond Sanitary District 117.2%52%8.8 pts 40%→20% FY2018
Coleman Water17.1%52%15.5 pts 51%→16% FY2019
Milltown Water17.0%52%12.6 pts 43%→8% FY2023
Wind Point Municipal Water16.9%52%9.5 pts 6%→45% FY2022
Genoa City Municipal Water16.8%51%8.6 pts 18%→2% FY2021
Rothschild Municipal Water16.8%51%8.6 pts 13%→31% FY2023
Maplewood Sanitary District No 116.7%51%8.4 pts 33%→16% FY2023
Avoca Municipal Water16.6%50%9.6 pts 32%→11% FY2024
Boscobel Municipal16.6%50%7.9 pts 19%→36% FY2018
Iron Ridge Municipal Water16.5%50%12.7 pts 51%→17% FY2025
Mary Hill Park Sanitary District16.1%49%15.5 pts 4%→44% FY2020
Cleveland Water16.0%48%9.5 pts 30%→8% FY2022
Greenwood Water15.3%46%8.7 pts 16%→38% FY2018
Winter Water15.1%45%10 pts 31%→2% FY2023
Northfield Sanitary District No 115.1%45%11.7 pts 57%→15% FY2018
Ironton Water14.9%44%14 pts 8%→51% FY2018
Adell Municipal Sewer And Water13.4%40%12.5 pts 3%→28% FY2023
Arlington Water12.4%35%13.8 pts 32%→67% FY2019
Taylor Water11.3%30%9 pts 38%→8% FY2018
Whitelaw Municipal Water And Sewer11.3%30%9.5 pts 26%→42% FY2019
Mount Calvary Municipal11.2%30%8.8 pts 44%→17% FY2018
Fairwater Municipal Water10.5%27%8.7 pts 25%→8% FY2019
Combined Locks Water10.4%27%7.7 pts 21%→4% FY2020
Roberts Water9.5%24%9.3 pts 27%→10% FY2025
Wyocena Municipal Water And Sewer8.9%22%23.3 pts 99%→9% FY2025
Junction City Water8.9%22%11.2 pts 55%→18% FY2021
Cambria Municipal Water8.8%22%8 pts 27%→9% FY2025
Leroy Sanitary District No 18.6%21%20.9 pts 7%→62% FY2022
Tennyson Water8.1%19%9.5 pts 8%→27% FY2021
Westby Municipal Electric And Water8.1%19%18.7 pts 23%→92% FY2022
Montreal Municipal Water8.0%19%11.6 pts 39%→14% FY2024
Fifield Sanitary District7.9%19%9 pts 24%→8% FY2025
Cazenovia Water7.9%19%19.7 pts 77%→15% FY2024
Wilton Municipal Water And Sewer7.8%17%8.8 pts 29%→9% FY2018
Soldiers Grove Municipal Water7.8%17%8.2 pts 8%→26% FY2023
Kieler Sanitary District #17.3%16%10.2 pts 2%→26% FY2019
New Glarus Light And7.2%14%11.7 pts 19%→7% FY2018
Hollandale Water6.8%15%11.6 pts 35%→7% FY2025
Maine Water6.4%14%22.9 pts 58%→17% FY2022
Sextonville Waterworks San Dist6.2%14%13.6 pts 8%→50% FY2019
Hustler Municipal Water6.0%13%7.7 pts 38%→9% FY2021
Eastman Water6.0%13%9.8 pts 18%→1% FY2021
Somers Water5.4%11%7.8 pts 34%→10% FY2022
Osceola Municipal Water5.4%11%20.3 pts 87%→5% FY2025
Random Lake Municipal5.3%11%9.2 pts 24%→40% FY2017
Bluffview Sanitary District5.0%10%9.5 pts 1%→28% FY2024
Lannon Municipal Water4.0%7%11.6 pts 64%→35% FY2023
Stockbridge Water3.0%6%8 pts 37%→13% FY2023
Campbellsport Municipal Water3.0%5%12.6 pts 50%→3% FY2025
Yuba Municipal2.8%5%11.1 pts 16%→46% FY2021
Elcho Sanitary District No 12.8%6%8.3 pts 0%→17% FY2019
Pence Municipal2.8%5%7.9 pts 24%→8% FY2020
Muscoda Light And Water2.7%4%7.7 pts 35%→3% FY2025
Bloomer Water2.2%4%10.3 pts 26%→2% FY2025
Chaseburg Water And Sewer1.8%3%10.8 pts 40%→13% FY2024

Every system

Names and links only. Each system's own page carries the archived cell every figure was read from, its retrieval date and its citation line; the county pages carry the same figures a few dozen at a time. A figure quoted from an index without that page is a figure without its basis.

Source: Public Service Commission of Wisconsin, as filed by each utility. States differ in what they publish, so these pages differ in what they can show: PSC publishes component volumes and no price of any kind, so a loss here is a volume and never a dollar amount — the comparisons are to the rest of the state and to the system's own record. Report a correction.

Cite as

Municorn.us, “Wisconsin water loss by utility”, Municorn water loss index, https://municorn.us/water-loss/wi/ (source filings retrieved 2026-09-08).

CC BY 4.0 — reuse and redistribution are permitted with attribution to Municorn.us and a link to this page. Terms, and the one caveat that must travel with these figures.

"Water loss" is at least three different quantities depending on the jurisdiction, and nothing here supports a comparison between states.