Is Chanhassen Tap Water Safe? Quality Report

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

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
RPT	Monitoring	Resolved	2025-07-02
RPT	Monitoring	Resolved	2025-07-02

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	1175.5 µg/L 90% of the EPA limit 1300 µg/L worst single sample: 8020 µg/L	90/90	SYR4	2013–2019
Chloroform	17.6 µg/L No EPA limit set worst single sample: 19 µg/L	35/43	SYR4	2012–2019
Bromodichloromethane	7.3 µg/L No EPA limit set worst single sample: 7.8 µg/L	33/43	SYR4	2012–2019
Fluoride	1100 µg/L 28% of the EPA limit 4000 µg/L	33/33	SYR4	2012–2019
Lead	5.04 µg/L 34% of the EPA limit 15 µg/L worst single sample: 314 µg/L	33/90	SYR4	2013–2019
Dibromochloromethane	2.91 µg/L No EPA limit set worst single sample: 3.3 µg/L	27/43	SYR4	2012–2019
Dichloroacetic Acid	7.06 µg/L No EPA limit set worst single sample: 9 µg/L	25/29	SYR4	2012–2019
Trichloroacetic Acid	6.88 µg/L No EPA limit set worst single sample: 8.8 µg/L	25/29	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	17/17	LCR	2025
Barium	155.65 µg/L 7.8% of the EPA limit 2000 µg/L worst single sample: 163 µg/L	8/8	SYR4	2012–2018
Nitrate-Nitrite	100 µg/L 1% of the EPA limit 10000 µg/L	8/76	SYR4	2012–2019
Arsenic	1.245 µg/L 12% of the EPA limit 10 µg/L worst single sample: 1.28 µg/L	6/13	SYR4	2012–2018
Chromium	0.2200 µg/L 0.2% of the EPA limit 100 µg/L	4/14	SYR4	2012–2018
Gross Alpha, Excl. Radon And U	5.035 pCi/L 34% of the EPA limit 15 pCi/L worst single sample: 5.2 pCi/L	4/8	SYR4	2013–2019
Lithium	9.7 µg/L No EPA limit set	3/4	UCMR-5	2024
Bromoform	0.7000 µg/L No EPA limit set	1/43	SYR4	2012–2019

86 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, TotalChlorobenzeneCyanideCadmiumCarbofuranCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitriteOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone: 9522271100
Email: [email protected]

Frequently asked questions about Chanhassen

Is Chanhassen tap water safe to drink?

EPA monitoring detected 16 contaminants in Chanhassen'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 Chanhassen's water?

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

How many people does Chanhassen serve?

Chanhassen reports serving 24,951 people in Minnesota, per its EPA record.

Has Chanhassen had any water quality violations?

The EPA has 2 violations on file for Chanhassen, 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.