Is Colville Water Department Tap Water Safe? Quality Report

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

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
MCL	Health-based	Archived	1994-07-01 → 1994-07-31
MCL	Health-based	Archived	1993-10-01 → 1993-10-31
MCL	Health-based	Archived	1993-07-01 → 1993-07-31
MCL	Health-based	Archived	1992-11-01 → 1992-11-30
Other	Monitoring	Resolved	2024-07-01
MR	Monitoring	Archived	1979-10-01 → 1979-10-31

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
Bromodichloromethane	2.806 µg/L No EPA limit set worst single sample: 2.91 µg/L	14/19	SYR4	2012–2019
Dibromochloromethane	2.453 µg/L No EPA limit set worst single sample: 2.57 µg/L	14/19	SYR4	2012–2019
Lead	0.0011 mg/L 7.3% of the EPA limit 0.0150 mg/L	14/14	LCR	2023
TTHM	7.52 µg/L 9.4% of the EPA limit 80 µg/L worst single sample: 7.91 µg/L	14/14	SYR4	2013–2019
Chloroform	2.6045 µg/L No EPA limit set worst single sample: 2.61 µg/L	12/19	SYR4	2012–2019
Nitrate	810 µg/L 8.1% of the EPA limit 10000 µg/L	10/40	SYR4	2012–2019
Bromoform	1.215 µg/L No EPA limit set worst single sample: 1.27 µg/L	3/19	SYR4	2012–2019
Barium	119.5 µg/L 6% of the EPA limit 2000 µg/L worst single sample: 120 µg/L	2/3	SYR4	2012–2017
Dichloroacetic Acid	1.4485 µg/L No EPA limit set worst single sample: 1.45 µg/L	2/14	SYR4	2013–2019
Fluoride	287.5 µg/L 7.2% of the EPA limit 4000 µg/L worst single sample: 290 µg/L	2/3	SYR4	2012–2017
Total Haloacetic Acids (HAA5)	1.4485 µg/L 2.4% of the EPA limit 60 µg/L worst single sample: 1.45 µg/L	2/12	SYR4	2013–2018
Nitrate-Nitrite	790 µg/L 7.9% of the EPA limit 10000 µg/L	1/3	SYR4	2012–2017

76 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, TotalArsenicBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEndothallEthylbenzeneHfpo-DaLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Joe Merrill

Frequently asked questions about Colville Water Department

Is Colville Water Department tap water safe to drink?

EPA monitoring detected 12 contaminants in Colville Water Department'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 Colville Water Department's water?

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

How many people does Colville Water Department serve?

Colville Water Department reports serving 4,945 people in Washington, per its EPA record.

Has Colville Water Department had any water quality violations?

The EPA has 6 violations on file for Colville Water Department, of which 4 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.