Is North High Rock Estates W.S. Tap Water Safe? Quality Report

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

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	2004-10-01 → 2004-10-31
MCL	Health-based	Archived	2004-09-01 → 2004-09-30
MCL	Health-based	Archived	2004-08-01 → 2004-08-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31
MR	Monitoring	Resolved	2014-10-01 → 2014-12-31

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	3165 µg/L 32% of the EPA limit 10000 µg/L worst single sample: 3200 µg/L	22/26	SYR4	2012–2019
Nitrate-Nitrite	2850 µg/L 28% of the EPA limit 10000 µg/L worst single sample: 3200 µg/L	11/13	SYR4	2012–2019
Lead	0.0058 mg/L 39% of the EPA limit 0.0150 mg/L	9/9	LCR	2025
Bromodichloromethane	2.3995 µg/L No EPA limit set worst single sample: 2.41 µg/L	2/4	SYR4	2013–2017
Chloroform	4.603 µg/L No EPA limit set worst single sample: 4.64 µg/L	2/7	SYR4	2013–2017
Dibromochloromethane	0.5475 µg/L No EPA limit set worst single sample: 0.5500 µg/L	2/4	SYR4	2013–2017
Dichloroacetic Acid	3.3035 µg/L No EPA limit set worst single sample: 3.34 µg/L	2/3	SYR4	2013–2017
TTHM	7.55 µg/L 9.4% of the EPA limit 80 µg/L worst single sample: 7.6 µg/L	2/3	SYR4	2013–2017
Total Haloacetic Acids (HAA5)	5.9285 µg/L 9.9% of the EPA limit 60 µg/L worst single sample: 6 µg/L	2/3	SYR4	2013–2017
Trichloroacetic Acid	2.625 µg/L No EPA limit set worst single sample: 2.66 µg/L	2/3	SYR4	2013–2017
Arsenic	3 µg/L 30% of the EPA limit 10 µg/L	1/3	SYR4	2015–2019

60 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 AcidDinosebEndrinEthylbenzeneFluorideHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Chris Gott

Frequently asked questions about North High Rock Estates W.S.

Is North High Rock Estates W.S. tap water safe to drink?

EPA monitoring detected 11 contaminants in North High Rock Estates W.S.'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 North High Rock Estates W.S.'s water?

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

How many people does North High Rock Estates W.S. serve?

North High Rock Estates W.S. reports serving 68 people in Washington, per its EPA record.

Has North High Rock Estates W.S. had any water quality violations?

The EPA has 31 violations on file for North High Rock Estates W.S., of which 3 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.