Is Winchester Heights Tap Water Safe? Quality Report

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

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	2006-09-01 → 2006-09-30
MCL	Health-based	Archived	1993-09-01 → 1993-09-30
Other	Monitoring	Resolved	2025-07-01
Other	Monitoring	Resolved	2015-07-01
Other	Monitoring	Resolved	2013-07-01
Other	Monitoring	Resolved	2012-07-01
Other	Monitoring	Resolved	2010-07-01
MR	Monitoring	Resolved	2009-01-01 → 2009-12-31
MR	Monitoring	Archived	1994-02-01 → 1994-02-28

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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
Nitrate	1900 µg/L 19% of the EPA limit 10000 µg/L	18/18	SYR4	2012–2019
Lead	0.0018 mg/L 12% of the EPA limit 0.0150 mg/L	12/12	LCR	2023
Dibromochloromethane	1.2 µg/L No EPA limit set	4/4	SYR4	2013–2017
TTHM	2.8 µg/L 3.5% of the EPA limit 80 µg/L	4/4	SYR4	2013–2017
Chloroform	0.5000 µg/L No EPA limit set	3/4	SYR4	2013–2017
Bromodichloromethane	1.1 µg/L No EPA limit set	2/4	SYR4	2013–2017
Arsenic	1 µg/L 10% of the EPA limit 10 µg/L	1/1	SYR4	2015
Nitrate-Nitrite	1300 µg/L 13% of the EPA limit 10000 µg/L	1/1	SYR4	2015

63 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, TotalAtrazineBhc-GammaBariumBenzeneBenzo(A)PyreneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDichloroacetic AcidDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Sean Vance

Frequently asked questions about Winchester Heights

Is Winchester Heights tap water safe to drink?

EPA monitoring detected 8 contaminants in Winchester Heights'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 Winchester Heights's water?

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

How many people does Winchester Heights serve?

Winchester Heights reports serving 80 people in Washington, per its EPA record.

Has Winchester Heights had any water quality violations?

The EPA has 9 violations on file for Winchester Heights, 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.