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Tap water quality report

Three Lakes, WI

EPA monitoring detected 21 contaminants across the 2 water suppliers serving Three Lakes. 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.

2
water suppliers
815
people served
21
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Three Lakes'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-Nitrite
3780 µg/L 38%
of the EPA limit 10000 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2017
1/2 SYR4
Nitrate
3670 µg/L 37%
of the EPA limit 10000 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2019
1/2 SYR4
Copper
302 µg/L 23%
of the EPA limit 1300 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2017
2/2 SYR4
Fluoride
110 µg/L 2.8%
of the EPA limit 4000 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2018
1/2 SYR4
Barium
48.9 µg/L 2.4%
of the EPA limit 2000 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2017
2/2 SYR4
TTHM
11.7815 µg/L 15%
of the EPA limit 80 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Chloroform
7.73 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Lead
5.23 µg/L 35%
of the EPA limit 15 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2017
2/2 SYR4
Xylenes, Total
5.08 µg/L 0.1%
of the EPA limit 10000 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Total Haloacetic Acids (HAA5)
4.792 µg/L 8%
of the EPA limit 60 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Dichloroacetic Acid
3.7675 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Arsenic
3.65 µg/L 37%
of the EPA limit 10 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2018
1/2 SYR4
Dibromochloromethane
3.525 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Bromodichloromethane
3.11 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Trichloroacetic Acid
2.06 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Combined Radium (-226 And -228)
1.41 pCi/L 28%
of the EPA limit 5 pCi/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2014
Highest in the city: 1.5 pCi/L — NORTHERNAIRE SANITARY DISTRICT · 315 people · 2015
2/2 SYR4
Ethylbenzene
1.28 µg/L 0.2%
of the EPA limit 700 µg/L
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Chromium
1.195 µg/L 1.2%
of the EPA limit 100 µg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2017
1/2 SYR4
Bromoform
1.076 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Dibromoacetic Acid
0.6500 µg/L
No EPA limit set
Highest in the city: NORTHERNAIRE SANITARY DISTRICT · 315 people · 2019
1/2 SYR4
Lead
0.0112 mg/L 75%
of the EPA limit 0.0150 mg/L
Main supplier: THREE LAKES SANITARY DISTRICT · 500 people · 2023
2/2 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 Three Lakes

SupplierPopulation served
THREE LAKES SANITARY DISTRICT 500
NORTHERNAIRE SANITARY DISTRICT 315

Frequently asked questions about Three Lakes tap water

Is Three Lakes tap water safe to drink?

EPA testing detected 21 contaminants in the water serving Three Lakes. 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 Three Lakes?

2 public water suppliers report drinking-water monitoring for Three Lakes, Wisconsin to the EPA. Each is listed above with its population served.

What contaminants are in Three Lakes's water?

The contaminants EPA monitoring detected in Three Lakes include Nitrate-Nitrite, Nitrate, Copper, Fluoride, 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.