Is Lake-O-The-Woods Tap Water Safe? Quality Report

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

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	1999-11-01 → 1999-11-30
MCL	Health-based	Archived	1999-11-01 → 1999-11-30
MCL	Health-based	Archived	1999-11-01 → 1999-11-30
MCL	Health-based	Archived	1999-09-01 → 1999-09-30
MCL	Health-based	Archived	1999-09-01 → 1999-09-30
MCL	Health-based	Archived	1999-09-01 → 1999-09-30
MCL	Health-based	Archived	1999-02-01 → 1999-02-28
MCL	Health-based	Archived	1999-02-01 → 1999-02-28
MCL	Health-based	Archived	1999-02-01 → 1999-02-28
MCL	Health-based	Archived	1997-05-01 → 1997-05-31

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
Lead	0.0045 mg/L 30% of the EPA limit 0.0150 mg/L	11/11	LCR	2023
Nitrate	110 µg/L 1.1% of the EPA limit 10000 µg/L	2/12	SYR4	2013–2018
Arsenic	3.3 µg/L 33% of the EPA limit 10 µg/L	1/1	SYR4	2014
Copper	37 µg/L 2.8% of the EPA limit 1300 µg/L	1/1	SYR4	2014
Lead	2.2 µg/L 15% of the EPA limit 15 µg/L	1/1	SYR4	2014

43 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, TotalBariumBenzeneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCyanideCadmiumCarbon TetrachlorideChloroformChromiumDichloromethaneDalaponDibromochloromethaneDinosebEthylbenzeneFluorideMercuryNitrate-NitriteNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Andrew Campbell

Frequently asked questions about Lake-O-The-Woods

Is Lake-O-The-Woods tap water safe to drink?

EPA monitoring detected 5 contaminants in Lake-O-The-Woods'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 Lake-O-The-Woods's water?

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

How many people does Lake-O-The-Woods serve?

Lake-O-The-Woods reports serving 108 people in Washington, per its EPA record.

Has Lake-O-The-Woods had any water quality violations?

The EPA has 25 violations on file for Lake-O-The-Woods, of which 16 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.