Tap WaterIndex

← Wisconsin

Tap water quality report

Winter, WI

EPA monitoring detected 18 contaminants across the 1 water supplier serving Winter. 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
344
people served
18
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Winter'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
2460 µg/L 25%
of the EPA limit 10000 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Nitrate-Nitrite
2225.5 µg/L 22%
of the EPA limit 10000 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Copper
1199.8 µg/L 92%
of the EPA limit 1300 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Lead
724.75 µg/L 4832%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Fluoride
99.5 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Barium
21.27 µg/L 1.1%
of the EPA limit 2000 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Total Haloacetic Acids (HAA5)
17.4261 µg/L 29%
of the EPA limit 60 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Monochloroacetic Acid
16.652 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
TTHM
8.6569 µg/L 11%
of the EPA limit 80 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Bromodichloromethane
3.168 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Gross Alpha, Excl. Radon And U
2.815 pCi/L 19%
of the EPA limit 15 pCi/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Chloroform
2.7431 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Dibromochloromethane
2.105 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Combined Radium (-226 And -228)
0.7315 pCi/L 15%
of the EPA limit 5 pCi/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Combined Uranium
0.5895 µg/L 2%
of the EPA limit 30 µg/L
Main supplier: WINTER WATERWORKS · 344 people · 2017
1/1 SYR4
Trichloroacetic Acid
0.5830 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Dichloroacetic Acid
0.4290 µg/L
No EPA limit set
Main supplier: WINTER WATERWORKS · 344 people · 2019
1/1 SYR4
Lead
0.0052 mg/L 35%
of the EPA limit 0.0150 mg/L
Main supplier: WINTER WATERWORKS · 344 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 Winter

SupplierPopulation served
WINTER WATERWORKS 344

Frequently asked questions about Winter tap water

Is Winter tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Winter. 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 Winter?

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

What contaminants are in Winter's water?

The contaminants EPA monitoring detected in Winter include Nitrate, Nitrate-Nitrite, Copper, Lead, Fluoride. 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.