Is Chaska 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
MR	Monitoring	Resolved	2001-10-01 → 2001-10-31
MR	Monitoring	Resolved	2001-10-01 → 2001-10-31

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	343.55 µg/L 26% of the EPA limit 1300 µg/L worst single sample: 653 µg/L	90/90	SYR4	2013–2019
Lead	7.675 µg/L 51% of the EPA limit 15 µg/L worst single sample: 36.1 µg/L	66/90	SYR4	2013–2019
Chloroform	25.35 µg/L No EPA limit set worst single sample: 26 µg/L	34/35	SYR4	2012–2019
Fluoride	1440 µg/L 36% of the EPA limit 4000 µg/L worst single sample: 1500 µg/L	33/33	SYR4	2012–2019
Bromodichloromethane	15.5 µg/L No EPA limit set worst single sample: 19 µg/L	31/34	SYR4	2012–2019
Dibromochloromethane	10.5 µg/L No EPA limit set worst single sample: 11 µg/L	31/34	SYR4	2012–2019
Trichloroacetic Acid	3.51 µg/L No EPA limit set worst single sample: 4 µg/L	27/31	SYR4	2012–2019
Bromoform	1.6 µg/L No EPA limit set worst single sample: 1.9 µg/L	26/34	SYR4	2012–2019
Dichloroacetic Acid	5.575 µg/L No EPA limit set worst single sample: 6.5 µg/L	26/31	SYR4	2012–2019
Dibromoacetic Acid	2.24 µg/L No EPA limit set worst single sample: 2.6 µg/L	19/31	SYR4	2012–2019
Nitrate-Nitrite	820 µg/L 8.2% of the EPA limit 10000 µg/L	16/32	SYR4	2012–2019
Lead	0.0060 mg/L 40% of the EPA limit 0.0150 mg/L	14/14	LCR	2025
Chromium	0.2400 µg/L 0.2% of the EPA limit 100 µg/L	3/8	SYR4	2012–2014
Barium	144.56 µg/L 7.2% of the EPA limit 2000 µg/L worst single sample: 150 µg/L	2/2	SYR4	2012
Lithium	15.8 µg/L No EPA limit set	2/2	UCMR-5	2023
Arsenic	1.52 µg/L 15% of the EPA limit 10 µg/L	1/2	SYR4	2012
Gross Alpha, Excl. Radon And U	6 pCi/L 40% of the EPA limit 15 pCi/L	1/2	SYR4	2017

84 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) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGlyphosateHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaOxamylPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Phone: 9524489200
Email: [email protected]

Frequently asked questions about Chaska

Is Chaska tap water safe to drink?

EPA monitoring detected 17 contaminants in Chaska'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 Chaska's water?

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

How many people does Chaska serve?

Chaska reports serving 30,000 people in Minnesota, per its EPA record.

Has Chaska had any water quality violations?

The EPA has 2 violations on file for Chaska, 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.