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Tap water quality report

Onamia, MN

EPA monitoring detected 17 contaminants across the 5 water suppliers serving Onamia. 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
5,586
people served
17
contaminants found
Minnesota rankings Lead in Minnesota PFAS in Minnesota

What was found in Onamia'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
Copper
421.8 µg/L 32%
of the EPA limit 1300 µg/L
Main supplier: VINELAND · 4,220 people · 2017
Highest in the city: 1107.5 µg/L — Onamia · 831 people · 2017
4/5 SYR4
Fluoride
100 µg/L 2.5%
of the EPA limit 4000 µg/L
Main supplier: VINELAND · 4,220 people · 2013
Highest in the city: 1000 µg/L — Onamia · 831 people · 2019
4/5 SYR4
Lead
888.2 µg/L 5921%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
Main supplier: VINELAND · 4,220 people · 2017
4/5 SYR4
Barium
47 µg/L 2.4%
of the EPA limit 2000 µg/L
Main supplier: VINELAND · 4,220 people · 2013
Highest in the city: 208.35 µg/L — Onamia · 831 people · 2018
3/5 SYR4
Cyanide
137 µg/L 69%
of the EPA limit 200 µg/L
Highest in the city: Onamia · 831 people · 2018
2/5 SYR4
TTHM
62.83 µg/L 79%
of the EPA limit 80 µg/L
Main supplier: VINELAND · 4,220 people · 2019
2/5 SYR4
Total Haloacetic Acids (HAA5)
59.76 µg/L 100%
of the EPA limit 60 µg/L
Main supplier: VINELAND · 4,220 people · 2019
2/5 SYR4
Dichloroacetic Acid
14.3 µg/L
No EPA limit set
Highest in the city: Onamia · 831 people · 2019
1/5 SYR4
Chloroform
12.39 µg/L
No EPA limit set
Highest in the city: Onamia · 831 people · 2019
1/5 SYR4
Gross Alpha, Excl. Radon And U
0.4600 pCi/L 3.1%
of the EPA limit 15 pCi/L
Main supplier: VINELAND · 4,220 people · 2013
Highest in the city: 6 pCi/L — Onamia · 831 people · 2018
3/5 SYR4
Monochloroacetic Acid
2.6 µg/L
No EPA limit set
Highest in the city: Onamia · 831 people · 2019
1/5 SYR4
Trichloroacetic Acid
2.48 µg/L
No EPA limit set
Highest in the city: Onamia · 831 people · 2019
1/5 SYR4
Arsenic
2.433 µg/L 24%
of the EPA limit 10 µg/L
Highest in the city: Green Acres Mobile Home Park · 80 people · 2019
2/5 SYR4
Bromodichloromethane
1.05 µg/L
No EPA limit set
Highest in the city: Onamia · 831 people · 2019
1/5 SYR4
Chromium
1 µg/L 1%
of the EPA limit 100 µg/L
Highest in the city: APPLE ORCHARD · 55 people · 2015
1/5 SYR4
Combined Uranium
0.0894 µg/L 0.3%
of the EPA limit 30 µg/L
Highest in the city: APPLE ORCHARD · 55 people · 2017
1/5 SYR4
Lead
0.0080 mg/L 53%
of the EPA limit 0.0150 mg/L
Main supplier: VINELAND · 4,220 people · 2025
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 Onamia

SupplierPopulation served
VINELAND 4,220
Onamia 831
HINCKLEY 400
Green Acres Mobile Home Park 80
APPLE ORCHARD 55

Frequently asked questions about Onamia tap water

Is Onamia tap water safe to drink?

EPA testing detected 17 contaminants in the water serving Onamia. 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 Onamia?

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

What contaminants are in Onamia's water?

The contaminants EPA monitoring detected in Onamia include Copper, Fluoride, Lead, Barium, Cyanide. 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.