Is Grand Mound Tap Water Safe? Quality Report

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

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
MON	Monitoring	Resolved	2018-02-01 → 2018-02-28
Other	Monitoring	Resolved	2016-07-01
Other	Monitoring	Resolved	2015-07-01
MR	Monitoring	Resolved	2009-01-01 → 2009-12-31

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	3355 µg/L 34% of the EPA limit 10000 µg/L worst single sample: 3400 µg/L	30/30	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	13/13	LCR	2024
TTHM	1.926 µg/L 2.4% of the EPA limit 80 µg/L worst single sample: 1.98 µg/L	5/5	SYR4	2014–2019
Dibromochloromethane	0.9735 µg/L No EPA limit set worst single sample: 0.9900 µg/L	4/9	SYR4	2014–2019
Chloroform	0.3910 µg/L No EPA limit set worst single sample: 0.4000 µg/L	3/11	SYR4	2014–2019
Bromodichloromethane	0.7190 µg/L No EPA limit set worst single sample: 0.7200 µg/L	2/9	SYR4	2014–2019
Lead	2.185 µg/L 15% of the EPA limit 15 µg/L worst single sample: 2.2 µg/L	2/2	SYR4	2012
Nitrate-Nitrite	2444.65 µg/L 24% of the EPA limit 10000 µg/L worst single sample: 2467 µg/L	2/2	SYR4	2012

47 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-Dichloroethane1,2-Dichloropropane2,4,5-TP2,4-DAntimony, TotalArsenicBariumBenzeneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDichloroacetic AcidDinosebEthylbenzeneFluorideMercuryMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Trichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Kevin Patching

Frequently asked questions about Grand Mound

Is Grand Mound tap water safe to drink?

EPA monitoring detected 8 contaminants in Grand Mound'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 Grand Mound's water?

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

How many people does Grand Mound serve?

Grand Mound reports serving 3,764 people in Washington, per its EPA record.

Has Grand Mound had any water quality violations?

The EPA has 4 violations on file for Grand Mound, 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.