Is Willmar Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Local government
Counties served: Kandiyohi

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	2025-01-01 → 2025-06-30
MR	Monitoring	Resolved	2025-01-01 → 2025-06-30
MR	Monitoring	Resolved	2020-10-01
MR	Monitoring	Resolved	2020-10-01
MR	Monitoring	Resolved	2020-10-01

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
Copper	1535.5 µg/L 118% of the EPA limit, at the 95th percentile of samples — 1300 µg/L worst single sample: 1900 µg/L	150/150	SYR4	2013–2019
Lead	8.8 µg/L 59% of the EPA limit 15 µg/L worst single sample: 39.4 µg/L	104/150	SYR4	2013–2019
Fluoride	1200 µg/L 30% of the EPA limit 4000 µg/L worst single sample: 1300 µg/L	33/33	SYR4	2012–2019
Chloroform	2.625 µg/L No EPA limit set worst single sample: 4.4 µg/L	32/32	SYR4	2012–2019
Dichloroacetic Acid	7.05 µg/L No EPA limit set worst single sample: 7.4 µg/L	31/31	SYR4	2012–2019
Lead	0.0020 mg/L 13% of the EPA limit 0.0150 mg/L	23/23	LCR	2025
Nitrate-Nitrite	100 µg/L 1% of the EPA limit 10000 µg/L	16/48	SYR4	2012–2019
Trichloroacetic Acid	1.57 µg/L No EPA limit set worst single sample: 1.6 µg/L	7/31	SYR4	2012–2019
Chromium	0.2820 µg/L 0.3% of the EPA limit 100 µg/L worst single sample: 0.2900 µg/L	3/8	SYR4	2013–2015
Lithium	35.7 µg/L No EPA limit set	3/4	UCMR-5	2024
Arsenic	1.1985 µg/L 12% of the EPA limit 10 µg/L worst single sample: 1.2 µg/L	2/2	SYR4	2015
Barium	325.45 µg/L 16% of the EPA limit 2000 µg/L worst single sample: 328 µg/L	2/2	SYR4	2015
Bromodichloromethane	1.6 µg/L No EPA limit set	1/32	SYR4	2012–2019

88 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateGross Alpha, Excl. Radon And UHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone: 3202354913
Email: [email protected]

Frequently asked questions about Willmar

Is Willmar tap water safe to drink?

EPA monitoring detected 13 contaminants in Willmar'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 Willmar's water?

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

How many people does Willmar serve?

Willmar reports serving 21,045 people in Minnesota, per its EPA record.

Has Willmar had any water quality violations?

The EPA has 5 violations on file for Willmar, 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.