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Tap water quality report

Stillwater, MN

EPA monitoring detected 22 contaminants across the 5 water suppliers serving Stillwater. 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.

5
water suppliers
20,273
people served
22
contaminants found
Minnesota rankings Lead in Minnesota PFAS in Minnesota

What was found in Stillwater'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
3700 µg/L 37%
of the EPA limit 10000 µg/L
Main supplier: Stillwater · 19,462 people · 2019
5/5 SYR4
Fluoride
1100 µg/L 28%
of the EPA limit 4000 µg/L
Main supplier: Stillwater · 19,462 people · 2019
2/5 SYR4
Copper
712 µg/L 55%
of the EPA limit 1300 µg/L
Main supplier: Stillwater · 19,462 people · 2019
Highest in the city: 1006.3 µg/L — Cedar Terrace Mobile Home Park · 25 people · 2017
5/5 SYR4
Barium
50.3 µg/L 2.5%
of the EPA limit 2000 µg/L
Highest in the city: Cedar Terrace Mobile Home Park · 25 people · 2019
2/5 SYR4
Lead
5.7 µg/L 38%
of the EPA limit 15 µg/L
Main supplier: Stillwater · 19,462 people · 2019
Highest in the city: 14.945 µg/L — Cedar Terrace Mobile Home Park · 25 people · 2017
5/5 SYR4
Lithium
10.9 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
Chloroform
7.4 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2019
2/5 SYR4
Toluene
3.68 µg/L 0.4%
of the EPA limit 1000 µg/L
Highest in the city: Hugo Estates · 300 people · 2019
1/5 SYR4
Chromium
2.8 µg/L 2.8%
of the EPA limit 100 µg/L
Main supplier: Stillwater · 19,462 people · 2018
1/5 SYR4
Dibromochloromethane
2.1 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2019
2/5 SYR4
Bromodichloromethane
1.875 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2019
Highest in the city: 1.94 µg/L — Indian Hills Development · 156 people · 2019
2/5 SYR4
Bromoform
1.2 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2019
2/5 SYR4
Dibromoacetic Acid
1.18 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2019
1/5 SYR4
Ethylbenzene
0.5200 µg/L 0.1%
of the EPA limit 700 µg/L
Main supplier: Stillwater · 19,462 people · 2018
2/5 SYR4
Benzene
0.4950 µg/L 9.9%
of the EPA limit 5 µg/L
Highest in the city: Hugo Estates · 300 people · 2019
1/5 SYR4
Pfba
0.1180 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
Simazine
0.0700 µg/L 1.8%
of the EPA limit 4 µg/L
Highest in the city: Indian Hills Development · 156 people · 2019
1/5 SYR4
PFOS
0.0081 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
PFHXS
0.0072 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
PFOA
0.0052 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
Pfpea
0.0045 µg/L
No EPA limit set
Main supplier: Stillwater · 19,462 people · 2025
1/5 UCMR-5
Lead
0.0020 mg/L 13%
of the EPA limit 0.0150 mg/L
Main supplier: Stillwater · 19,462 people · 2025
Highest in the city: 0.0030 mg/L — Indian Hills Development · 156 people · 2023
5/5 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 Stillwater

SupplierPopulation served
Stillwater 19,462
Woodlund Mobile Home Park 330
Hugo Estates 300
Indian Hills Development 156
Cedar Terrace Mobile Home Park 25

Frequently asked questions about Stillwater tap water

Is Stillwater tap water safe to drink?

EPA testing detected 22 contaminants in the water serving Stillwater. 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 Stillwater?

5 public water suppliers report drinking-water monitoring for Stillwater, Minnesota to the EPA. Each is listed above with its population served.

What contaminants are in Stillwater's water?

The contaminants EPA monitoring detected in Stillwater include Nitrate-Nitrite, Fluoride, Copper, Barium, 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.