Is Shirona Water 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	2025-10-01 → 2025-12-31
MCL	Health-based	Archived	1998-05-01 → 1998-05-31
MCL	Health-based	Archived	1998-05-01 → 1998-05-31
MCL	Health-based	Archived	1998-05-01 → 1998-05-31
MCL	Health-based	Archived	1998-02-01 → 1998-02-28
MCL	Health-based	Archived	1998-02-01 → 1998-02-28
MCL	Health-based	Archived	1998-02-01 → 1998-02-28
MCL	Health-based	Archived	1994-09-01 → 1994-09-30
MCL	Health-based	Archived	1994-01-01 → 1994-01-31
MCL	Health-based	Archived	1992-10-01 → 1992-10-31

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
Dibromochloromethane	41.485 µg/L No EPA limit set worst single sample: 42 µg/L	22/22	SYR4	2012–2019
TTHM	93.525 µg/L 117% of the EPA limit, at the 95th percentile of samples — 80 µg/L worst single sample: 116.1 µg/L	22/22	SYR4	2012–2019
Bromodichloromethane	19 µg/L No EPA limit set worst single sample: 35.1 µg/L	21/22	SYR4	2012–2019
Bromoform	30.64 µg/L No EPA limit set worst single sample: 36.4 µg/L	19/22	SYR4	2012–2019
Chloroform	9.14 µg/L No EPA limit set worst single sample: 21.2 µg/L	19/22	SYR4	2012–2019
Dibromoacetic Acid	11.94 µg/L No EPA limit set worst single sample: 12.3 µg/L	19/19	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	40.24 µg/L 67% of the EPA limit 60 µg/L worst single sample: 77.5 µg/L	19/19	SYR4	2012–2019
Lead	0.0055 mg/L 37% of the EPA limit 0.0150 mg/L	15/15	LCR	2023
Dichloroacetic Acid	7.375 µg/L No EPA limit set worst single sample: 8.2 µg/L	12/19	SYR4	2012–2019
Trichloroacetic Acid	26.6 µg/L No EPA limit set worst single sample: 31 µg/L	11/19	SYR4	2012–2019
Monobromoacetic Acid	23.9 µg/L No EPA limit set worst single sample: 29.8 µg/L	6/19	SYR4	2012–2019
Gross Beta Particle Activity	4.42 pCi/L No EPA limit set	2/2	SYR4	2017
Monochloroacetic Acid	1.2 µg/L No EPA limit set	1/19	SYR4	2012–2019

45 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, TotalArsenicBariumBenzeneBeryllium, TotalChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDinosebEthylene DibromideEthylbenzeneFluorideLeadMercuryNitrateNitrate-NitriteNitritePentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Joanne Skaar

Frequently asked questions about Shirona Water

Is Shirona Water tap water safe to drink?

EPA monitoring detected 13 contaminants in Shirona Water'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 Shirona Water's water?

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

How many people does Shirona Water serve?

Shirona Water reports serving 243 people in Washington, per its EPA record.

Has Shirona Water had any water quality violations?

The EPA has 40 violations on file for Shirona Water, 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.