Is Onamia Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Mille Lacs

Compliance record

Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.

health-based violations

violations on file

still open

Violation	Type	Status	Period
MR	Monitoring	Resolved	2021-01-01

Other contaminants detected

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 this system's samples — over 100% is worth reading, but is not by itself a violation. Where a single sample came in higher than that percentile, it is noted under the bar. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Fluoride	1000 µg/L 25% of the EPA limit 4000 µg/L worst single sample: 1100 µg/L	33/33	SYR4	2012–2019
Copper	1107.5 µg/L 85% of the EPA limit 1300 µg/L worst single sample: 1250 µg/L	20/20	SYR4	2014–2017
Lead	15.805 µg/L 105% of the EPA limit, at the 95th percentile of samples — 15 µg/L worst single sample: 18.1 µg/L	18/20	SYR4	2014–2017
Chloroform	12.39 µg/L No EPA limit set worst single sample: 14 µg/L	8/15	SYR4	2013–2019
Dichloroacetic Acid	14.3 µg/L No EPA limit set worst single sample: 15 µg/L	8/8	SYR4	2013–2019
Trichloroacetic Acid	2.48 µg/L No EPA limit set worst single sample: 2.6 µg/L	7/8	SYR4	2013–2019
Bromodichloromethane	1.05 µg/L No EPA limit set worst single sample: 1.1 µg/L	6/15	SYR4	2013–2019
Monochloroacetic Acid	2.6 µg/L No EPA limit set	5/8	SYR4	2013–2019
Barium	208.35 µg/L 10% of the EPA limit 2000 µg/L worst single sample: 210 µg/L	2/2	SYR4	2017–2018
Cyanide	137 µg/L 69% of the EPA limit 200 µg/L worst single sample: 140 µg/L	2/3	SYR4	2017–2018
Gross Alpha, Excl. Radon And U	6 pCi/L 40% of the EPA limit 15 pCi/L	1/5	SYR4	2014–2018
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L	1/1	LCR	2023

60 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCadmiumCarbofuranCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNitrate-NitriteNitriteOxamylPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone: 3205323311
Email: [email protected]

Frequently asked questions about Onamia

Is Onamia tap water safe to drink?

EPA monitoring detected 12 contaminants in Onamia's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.

What contaminants were detected in Onamia's water?

EPA monitoring detected Fluoride, Copper, Lead, Chloroform, Dichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Onamia serve?

Onamia reports serving 831 people in Minnesota, per its EPA record.

Has Onamia had any water quality violations?

The EPA has 1 violation on file for Onamia, of which 0 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.

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.