Is Hydro Irrigation District No 9 Tap Water Safe? Quality Report

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

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	1998-09-01 → 1998-09-30
MCL	Health-based	Archived	1998-09-01 → 1998-09-30
MCL	Health-based	Archived	1998-09-01 → 1998-09-30
MCL	Health-based	Archived	1994-08-01 → 1994-08-31
MR	Monitoring	Resolved	1999-01-01 → 2000-01-01
MR	Monitoring	Archived	1997-11-01 → 1997-11-30
MR	Monitoring	Archived	1997-11-01 → 1997-11-30
MR	Monitoring	Archived	1979-10-01 → 1979-10-31

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
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	10/10	LCR	2023
Bromoform	0.5780 µg/L No EPA limit set worst single sample: 0.5800 µg/L	2/4	SYR4	2012–2017
Nitrate	2500 µg/L 25% of the EPA limit 10000 µg/L	2/16	SYR4	2012–2019
TTHM	0.5780 µg/L 0.7% of the EPA limit 80 µg/L worst single sample: 0.5800 µg/L	2/2	SYR4	2012–2017
Barium	17.5 µg/L 0.9% of the EPA limit 2000 µg/L	1/1	SYR4	2012
Fluoride	1020 µg/L 26% of the EPA limit 4000 µg/L	1/1	SYR4	2012

67 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, TotalArsenicAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDibromochloromethaneDichloroacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidMonochloroacetic AcidNitrate-NitriteNitritePentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Haloacetic Acids (HAA5)Total Polychlorinated Biphenyls (PCB)ToxapheneTrichloroacetic AcidTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Robert Berger

Frequently asked questions about Hydro Irrigation District No 9

Is Hydro Irrigation District No 9 tap water safe to drink?

EPA monitoring detected 6 contaminants in Hydro Irrigation District No 9'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 Hydro Irrigation District No 9's water?

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

How many people does Hydro Irrigation District No 9 serve?

Hydro Irrigation District No 9 reports serving 260 people in Washington, per its EPA record.

Has Hydro Irrigation District No 9 had any water quality violations?

The EPA has 8 violations on file for Hydro Irrigation District No 9, of which 4 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.