Is Maple Grove Tap Water Safe? Quality Report

Water source: Ground water
Ownership: Private
Counties served: Clallam

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	2003-09-01 → 2003-09-30
MCL	Health-based	Archived	2003-07-01 → 2003-07-31
Other	Monitoring	Resolved	2025-07-01
Other	Monitoring	Resolved	2018-07-01
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31
MR	Monitoring	Resolved	2004-10-01 → 2004-12-31

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
Nitrate	280 µg/L 2.8% of the EPA limit 10000 µg/L	20/24	SYR4	2013–2019
Lead	0.0025 mg/L 17% of the EPA limit 0.0150 mg/L	11/11	LCR	2023
Chloroform	0.6000 µg/L No EPA limit set	4/6	SYR4	2012–2018
TTHM	1.885 µg/L 2.4% of the EPA limit 80 µg/L worst single sample: 1.9 µg/L	4/4	SYR4	2012–2018
Bromodichloromethane	0.7000 µg/L No EPA limit set	3/6	SYR4	2012–2018
Dibromochloromethane	0.6000 µg/L No EPA limit set	3/6	SYR4	2012–2018
Nitrate-Nitrite	170 µg/L 1.7% of the EPA limit 10000 µg/L	2/2	SYR4	2013

50 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, TotalArsenicBariumBenzeneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebEthylene DibromideEthylbenzeneFluorideLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Dale Metzger

Frequently asked questions about Maple Grove

Is Maple Grove tap water safe to drink?

EPA monitoring detected 7 contaminants in Maple Grove'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 Maple Grove's water?

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

How many people does Maple Grove serve?

Maple Grove reports serving 132 people in Washington, per its EPA record.

Has Maple Grove had any water quality violations?

The EPA has 44 violations on file for Maple Grove, of which 2 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.