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Tap water quality report

Wallula Water District

EPA monitoring tested this supplier for 68 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

68
contaminants tested
8
detected
200
people served
2
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
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.

2
health-based violations
72
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Resolved 2010-01-01 → 2010-03-31
MCL Health-based Archived 2006-09-01 → 2006-09-30
Other Monitoring Resolved 2025-07-01
MR Monitoring Resolved 2024-01-01 → 2024-03-31
MR Monitoring Resolved 2022-01-01 → 2022-03-31
MR Monitoring Resolved 2022-01-01 → 2022-03-31
MR Monitoring Resolved 2021-10-01 → 2021-12-31
MR Monitoring Resolved 2021-10-01 → 2021-12-31
MR Monitoring Resolved 2021-07-01 → 2021-09-30
MR Monitoring Archived 2020-01-01 → 2025-12-31

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.
ContaminantLevel vs EPA limitDetection rateSourcePeriod
Nitrate
7900 µg/L 79%
of the EPA limit 10000 µg/L
worst single sample: 9400 µg/L
246/262 SYR4 2013–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 8/8 LCR 2025
Barium
45.75 µg/L 2.3%
of the EPA limit 2000 µg/L
worst single sample: 46 µg/L
2/2 SYR4 2013–2016
Fluoride
2659 µg/L 66%
of the EPA limit 4000 µg/L
worst single sample: 2710 µg/L
2/2 SYR4 2013–2016
Gross Beta Particle Activity
15.0385 pCi/L
No EPA limit set
worst single sample: 15.6 pCi/L
2/2 SYR4 2017
Nitrate-Nitrite
2133.5 µg/L 21%
of the EPA limit 10000 µg/L
worst single sample: 2230 µg/L
2/2 SYR4 2013–2016
Arsenic
4 µg/L 40%
of the EPA limit 10 µg/L
 1/2 SYR4 2013–2016
Nitrite
110 µg/L 11%
of the EPA limit 1000 µg/L
 1/2 SYR4 2013–2016
60 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, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalBromodichloromethaneBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChlordaneChloroformChromiumDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromochloromethaneDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorPentachlorophenolPicloramSeleniumSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Dennis Anderson

Frequently asked questions about Wallula Water District

Is Wallula Water District tap water safe to drink?

EPA monitoring detected 8 contaminants in Wallula Water District'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 Wallula Water District's water?

EPA monitoring detected Nitrate, Lead, Barium, Fluoride, Gross Beta Particle Activity, and others. The full list with the level and data source for each is above.

How many people does Wallula Water District serve?

Wallula Water District reports serving 200 people in Washington, per its EPA record.

Has Wallula Water District had any water quality violations?

The EPA has 72 violations on file for Wallula Water District, of which 2 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.