County · Wisconsin

Dane County, Wisconsin: drinking water records

Name: Drinking water records for Dane County, Wisconsin
Creator: U.S. Environmental Protection Agency
License: https://www.usa.gov/government-works

Explore EPA records for 46 community water systems across 35 ZIP codes in Dane County, then find water-testing resources and available recent monitoring-station readings.

In focus46Community water systems

Public records. Clearer context.

Data as of EPA UCMR 5 final release, August 2026 (file dated Aug 28, 2026) · EPA SDWIS 2026Q2 (file dated Jul 9, 2026). How we build these pages

Drinking-water records

EPA survey and compliance records are historical reports. UCMR 5 results are available for 15 of the 46 listed systems in this snapshot. A system with no reported PFAS detection is not a test of every tap or every contaminant.

systems in EPA's PFAS survey

systems where PFAS was found

systems at or above the PFOA or PFOS limit, on the yearly-average basis EPA uses

systems that have reached the lead action level

systems with a health-based violation since 2016

System population figures are summed from EPA registry records and can overlap where wholesalers and retail systems serve the same people. They are not a Census county-population estimate.

Water systems in this county

All 46 active community systems in the available county records, sorted by record completeness. Scroll the table to explore more systems.

Water system	People served	PFAS survey results	PFAS found	Health-based violations	Lead, 9 in 10 homes at or below
Madison Water Utility WI1130224	272,000	1,200	2	1	1.8 ppbbelow the action level
Sun Prairie Utilities WI1130258	39,300	420	0	1	2.8 ppbbelow the action level
Middleton Waterworks WI1130242	23,868	360	0	1	4 ppbbelow the action level
Verona Waterworks WI1130259	14,030	300	1	1	2.9 ppbbelow the action level
Deforest Waterworks WI1130221	10,500	240	0	1	6.0 ppbbelow the action level
Cottage Grove Waterworks WI1130218	9,345	180	0	1	2.3 ppbbelow the action level
Marshall Waterworks WI1130237	3,862	180	0	1	0.3 ppbbelow the action level
Fitchburg Utility Dist 1 WI1130231	24,500	240	0	0	2.3 ppbbelow the action level
Waunakee Waterworks WI1130265	14,879	240	0	0	1.7 ppbbelow the action level
Stoughton Waterworks WI1130078	13,078	240	1	0	4.2 ppbbelow the action level
Oregon Waterworks WI1130251	11,200	180	0	0	5.0 ppbbelow the action level
Mcfarland Waterworks WI1130241	9,676	180	1	0	2.1 ppbbelow the action level
Monona Waterworks WI1130245	8,624	180	5	0	2.8 ppbbelow the action level
Mt Horeb Waterworks WI1130247	7,756	240	2	0	3 ppbbelow the action level
Cross Plains Waterworks WI1130219	4,100	180	0	0	4.8 ppbbelow the action level
Cambridge Water & Sewer Utility WI1130074	1,638	0	0	1	1.2 ppbbelow the action level
Black Earth Waterworks WI1130211	1,493	0	0	1	2.4 ppbbelow the action level
Oakhill Correctional Inst WI1130250	1,096	0	0	1	0 ppbbelow the action level
Bay View Heights INC WI1130253	450	0	0	1	0.7 ppbbelow the action level
Lake Forest Water Coop WI1130232	400	0	0	2	8.1 ppbbelow the action level
Country View Mobile Home Community LLC WI1130248	80	0	0	3	0.3 ppbbelow the action level
Country Vineyard 4 WI1130603	28	0	0	1	7.5 ppbbelow the action level
Windsor Water Utility South WI1130267	4,607	0	0	0	5.5 ppbbelow the action level
Mendota Mental Health Inst WI1130235	2,787	0	0	0	7 ppbbelow the action level
Deerfield Waterworks WI1130223	2,510	0	0	0	1.7 ppbbelow the action level
Mazomanie Waterworks WI1130239	1,744	0	0	0	0 ppbbelow the action level
Shorewood Hills Waterworks WI1130236	1,670	0	0	0	1.7 ppbbelow the action level
Maple Bluff Waterworks WI1130234	1,342	0	0	0	2.8 ppbbelow the action level
Dane Waterworks WI1130220	1,117	0	0	0	3.1 ppbbelow the action level
Blue Mounds Waterworks WI1130023	950	0	0	0	0.9 ppbbelow the action level
Westport Water Utility WI1132442	800	0	0	0	1.0 ppbbelow the action level
Windsor Water Utility North WI1130246	400	0	0	0	4.8 ppbbelow the action level
Fitchburg Utility Dist 1 South WI1131004	350	0	0	0	5.2 ppbbelow the action level
Dons Mobile Manor WI1130266	160	0	0	0	3.8 ppbbelow the action level
Danville Drive Service Area WI1134098	150	0	0	0	1.3 ppbbelow the action level
Rimrock Road Neighborhood WI1132759	135	0	0	0	1.5 ppbbelow the action level
Applewood Hill WI1130244	125	0	0	0	1.8 ppbbelow the action level
Mazomanie MHP WI1130240	85	0	0	0	0 ppbbelow the action level
East Bristol Utility Coop WI1130278	80	0	0	0	3.6 ppbbelow the action level
Westport Bishops Bay Area WI1134103	80	0	0	0	0 ppbbelow the action level
Country View Estates WI1130214	65	0	0	0	3.1 ppbbelow the action level
Lake Pointe Apts - Well 1 5320-5326 WI1132499	60	0	0	0	0.8 ppbbelow the action level
Lake Pointe Apts - Well 2 5312-5318 WI1132500	60	0	0	0	0 ppbbelow the action level
Lake Pointe/Marina Bay WI1132557	50	0	0	0	0.6 ppbbelow the action level
Woodbridge Estates WI1133471	48	0	0	0	0.4 ppbbelow the action level
Pine Ridge Apts WI1132627	45	0	0	0	0.2 ppbbelow the action level

USGS · Monitoring stations

The water, more recently.

Available station readings in Dane County, Wisconsin. Each measurement keeps its time, unit and original source.

These readings describe water at a monitoring station. They do not test your tap, measure PFAS or lead, or determine whether water is safe to drink or swim in.

Recent observations load when this section comes into view.

How these readings update

We check for updates every 10 minutes while this section is visible and show supported observations from the last 48 hours. The time beside a reading is when USGS measured it; the checked time is when our service retrieved the response. We mark a reading more than 6 hours old as older. Provisional observations can change after USGS review. A missing reading does not mean zero or clean water.

Temperature, pH, dissolved oxygen, turbidity, conductivity, streamflow and water level are shown only where a station reports them. Different measurements have different units and sampling intervals. USGS data and documentation.

Your next step

Water testing, reports & local help.

Use these official directories to find your drinking-water agency, a certified laboratory and public water records. We have not yet added an individually reviewed local resource list for this county.

Official national directories

Water testing

Find your state’s private-well program

EPA’s state directory points well owners to local program information. Services and eligibility vary by state and county.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-05

Water testing

Find a certified drinking-water laboratory

Use EPA’s directory to reach your state’s laboratory certification program. EPA does not provide on-request testing of residential drinking water.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-08-11

Public records

Find your utility’s Consumer Confidence Report

EPA links to community water-system reports and explains how to read them. Look for your actual supplier rather than assuming every address in a county shares one system.

U.S. Environmental Protection Agency
Source reviewed 2026-09-15 · Source updated 2026-09-09

Public records

Explore USGS water observations

Find current and historical observations from USGS monitoring locations, including available stream, lake, and groundwater data. Measurements vary by station and do not replace a test of your household water.

U.S. Geological Survey
Source reviewed 2026-09-15

A county overview cannot identify every property’s water provider. If you use a public water system, confirm its name on your bill and request its annual Consumer Confidence Report. Private wells need their own testing; public-system records do not describe a private well.

Understand water testing and laboratory reports

Resource descriptions are compiled by Tap Water Lookup. Review dates describe our source check, not a new water sample. How we review sources · Suggest a correction

Explore your area

Local coverage in Dane County

35ZIP areas in this overview

Explore the water-system records, recent station readings and testing resources on this county page. They describe the systems and stations identified in each section; they are not a separate water test for every community.

Towns and communities

Belleville
Black Earth
Blue Mounds
Cottage Grove
Cross Plains
Dane
Deerfield
Fitchburg
Lake Ripley
Madison
Marshall
Mazomanie
McFarland
Middleton
Mount Horeb
Stoughton
Sun Prairie
Verona
Waunakee
Windsor

Explore water-system records Find water-testing resources

View ZIP areas and understand coverage

53508Belleville
53515Black Earth
53517Blue Mounds
53523Lake Ripley
53527Cottage Grove
53528Cross Plains
53529Dane
53531Deerfield
53532Windsor
53558McFarland
53559Marshall
53560Mazomanie
53562Middleton
53571Windsor
53572Mount Horeb
53575Fitchburg
53589Stoughton
53590Sun Prairie
53593Verona
53597Waunakee
53598Windsor
53703Madison
53704Madison
53705Madison
53706Madison
53711Fitchburg
53713Madison
53714Madison
53715Madison
53716Madison
53717Madison
53718Madison
53719Madison
53726Madison
53792Madison

These Census ZIP Code Tabulation Areas are grouped here by their largest county overlap. A ZIP area can cross county lines and contain several water suppliers or private wells. Place labels reflect Census geography, not verified postal city names or utility service boundaries.

Records for these areas are currently presented in this county overview rather than individual ZIP reports. An unpublished report does not mean there are no water records. Confirm your supplier on your water bill; if you use a private well, testing your own well is the relevant next step.

Beyond this county page

Keep reading. Compare nearby.

PFASChoosing a PFAS filterPFAS was found in 6 of the 15 systems EPA surveyed here. See how to check a filter’s certified PFAS reduction.LeadChoosing a lead filter13 systems here have reached the lead action level. See how to check a filter’s lead-reduction certification.Your utilityFind your annual water reportConfirm the supplier on your bill, then read its Consumer Confidence Report for local results.

Counties near Dane County

All Wisconsin counties

Sources and scope

EPA UCMR 5 occurrence data, samples collected 2023-01-03 – 2026-06-17, final release, August 2026 (file dated Aug 28, 2026); EPA SDWIS via ECHO, 2026Q2 extract (file dated Jul 9, 2026); EPA service-area boundaries v3.0; Census 2020 ZCTAs. Database prepared 2026-09-03.

Counts cover the systems that report this county to EPA. A water system may cross county lines. "Found" means at least one result at or above the laboratory reporting level; it is not a compliance finding.

Compiled by Tap Water Lookup from the sources identified on this page. Read the methodology and review process.