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Tap water quality report

Windsor, WI

EPA monitoring detected 18 contaminants across the 1 water supplier serving Windsor. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

1
water supplier
4,607
people served
18
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Windsor's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Nitrate
2500 µg/L 25%
of the EPA limit 10000 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Nitrate-Nitrite
2000 µg/L 20%
of the EPA limit 10000 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
Fluoride
1070.5 µg/L 27%
of the EPA limit 4000 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Copper
160 µg/L 12%
of the EPA limit 1300 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
Barium
120 µg/L 6%
of the EPA limit 2000 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
TTHM
10.887 µg/L 14%
of the EPA limit 80 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Chloroform
6.24 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
4.42 pCi/L 29%
of the EPA limit 15 pCi/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2014
1/1 SYR4
Bromodichloromethane
2.78 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Lead
2.515 µg/L 17%
of the EPA limit 15 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
Combined Radium (-226 And -228)
2.326 pCi/L 47%
of the EPA limit 5 pCi/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
1.86 µg/L 3.1%
of the EPA limit 60 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Dibromochloromethane
1.54 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Dichloroacetic Acid
1.498 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Chromium
0.8600 µg/L 0.9%
of the EPA limit 100 µg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2017
1/1 SYR4
Trichloroacetic Acid
0.3880 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Dibromoacetic Acid
0.2300 µg/L
No EPA limit set
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2019
1/1 SYR4
Lead
0.0055 mg/L 37%
of the EPA limit 0.0150 mg/L
Main supplier: WINDSOR WATER UTILITY SOUTH · 4,607 people · 2023
1/1 LCR
Each bar shows the measured level as a share of the EPA limit: green is well under, amber is close to it, red is over. For lead and copper the limit applies to exactly the 90th-percentile figure shown, so red there means a real exceedance. For everything else the limit applies to a running annual average while the figure is the 95th percentile of the system's samples — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Windsor

SupplierPopulation served
WINDSOR WATER UTILITY SOUTH 4,607

Frequently asked questions about Windsor tap water

Is Windsor tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Windsor. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Windsor?

1 public water supplier report drinking-water monitoring for Windsor, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in Windsor's water?

The contaminants EPA monitoring detected in Windsor include Nitrate, Nitrate-Nitrite, Fluoride, Copper, Barium. The full list, with the level at the main supplier and the data source, is in the table above.

Where does this data come from?

Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.