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Tap water quality report

Lone Rock Water Assn

EPA monitoring tested this supplier for 58 contaminants and detected 4. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

58
contaminants tested
4
detected
39
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Private
Counties served
Kitsap

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.

0
health-based violations
32
violations on file
1
still open
ViolationTypeStatusPeriod
Other Monitoring Unaddressed 2025-07-01
MR Monitoring Resolved 2022-01-01 → 2022-12-31
MR Monitoring Resolved 2019-01-01
Other Monitoring Resolved 2016-07-01
MR Monitoring Resolved 2016-01-01 → 2016-01-31
MR Monitoring Resolved 2009-01-01
MR Monitoring Resolved 2009-01-01
MR Monitoring Resolved 2009-01-01
MR Monitoring Resolved 2009-01-01
MR Monitoring Resolved 2009-01-01

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
250 µg/L 2.5%
of the EPA limit 10000 µg/L
 14/18 SYR4 2012–2019
Lead
0.0105 mg/L 70%
of the EPA limit 0.0150 mg/L
 7/7 LCR 2025
Arsenic
1 µg/L 10%
of the EPA limit 10 µg/L
 1/2 SYR4 2016–2019
Nitrate-Nitrite
220 µg/L 2.2%
of the EPA limit 10000 µg/L
 1/2 SYR4 2016–2019
54 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, TotalBhc-GammaBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneFluorideHeptachlorHeptachlor EpoxideLassoLeadMercuryMethoxychlorNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Clarke Whitney

Frequently asked questions about Lone Rock Water Assn

Is Lone Rock Water Assn tap water safe to drink?

EPA monitoring detected 4 contaminants in Lone Rock Water Assn'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 Lone Rock Water Assn's water?

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

How many people does Lone Rock Water Assn serve?

Lone Rock Water Assn reports serving 39 people in Washington, per its EPA record.

Has Lone Rock Water Assn had any water quality violations?

The EPA has 32 violations on file for Lone Rock Water Assn, of which 0 are health-based (a contaminant limit or required treatment was breached) and 1 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.