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Tap water quality report

Mauston, WI

EPA monitoring detected 20 contaminants across the 6 water suppliers serving Mauston. 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.

6
water suppliers
4,858
people served
20
contaminants found
Wisconsin rankings Lead in Wisconsin PFAS in Wisconsin

What was found in Mauston'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
3460 µg/L 35%
of the EPA limit 10000 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
Highest in the city: 12000 µg/L — MAUSTON GREEN ACRES · 40 people · 2019
6/6 SYR4
Nitrate-Nitrite
2717.5 µg/L 27%
of the EPA limit 10000 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
Highest in the city: 10075.3 µg/L — MAUSTON GREEN ACRES · 40 people · 2018
6/6 SYR4
Copper
265.45 µg/L 20%
of the EPA limit 1300 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
Highest in the city: 1217 µg/L — PEARCES MOBILE HOME ESTATES · 37 people · 2019
6/6 SYR4
Fluoride
1169.5 µg/L 29%
of the EPA limit 4000 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
4/6 SYR4
Lead
106.125 µg/L 708%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
6/6 SYR4
Barium
34.35 µg/L 1.7%
of the EPA limit 2000 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
Highest in the city: 55 µg/L — KOUNTRY AIRE EST MHP I · 90 people · 2018
6/6 SYR4
Total Haloacetic Acids (HAA5)
16.0308 µg/L 27%
of the EPA limit 60 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Monochloroacetic Acid
13.6175 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
TTHM
11.6424 µg/L 15%
of the EPA limit 80 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Gross Alpha, Excl. Radon And U
5.935 pCi/L 40%
of the EPA limit 15 pCi/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
5/6 SYR4
Dibromochloromethane
4.8665 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Combined Radium (-226 And -228)
3.8025 pCi/L 76%
of the EPA limit 5 pCi/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
6/6 SYR4
Bromoform
3.565 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Bromodichloromethane
2.738 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Trichloroacetic Acid
2.44 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Gross Beta Particle Activity
2.4 pCi/L
No EPA limit set
Highest in the city: KOUNTRY AIRE EST MHP I · 90 people · 2012
2/6 SYR4
Chloroform
1.574 µg/L
No EPA limit set
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2019
1/6 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
1/6 SYR4
Combined Uranium
0.7200 µg/L 2.4%
of the EPA limit 30 µg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2017
4/6 SYR4
Lead
0.00094 mg/L 6.3%
of the EPA limit 0.0150 mg/L
Main supplier: MAUSTON WATERWORKS · 4,456 people · 2023
Highest in the city: 0.0075 mg/L — KOUNTRY AIRE EST MHP I · 90 people · 2024
6/6 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 Mauston

SupplierPopulation served
MAUSTON WATERWORKS 4,456
KOUNTRY AIRE EST MHP III 210
KOUNTRY AIRE EST MHP I 90
MAUSTON GREEN ACRES 40
PEARCES MOBILE HOME ESTATES 37
KOUNTRY AIRE EST MHP II 25

Frequently asked questions about Mauston tap water

Is Mauston tap water safe to drink?

EPA testing detected 20 contaminants in the water serving Mauston. 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 Mauston?

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

What contaminants are in Mauston's water?

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