Is Yakima Water Division City of Tap Water Safe? Quality Report

Water source: Surface water
Ownership: Local government
Counties served: Yakima

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
TT	Health-based	Archived	1995-01-01 → 1995-01-31
TT	Health-based	Archived	1994-12-01 → 1994-12-31
TT	Health-based	Archived	1994-11-01 → 1994-11-30
Other	Monitoring	Resolved	2024-07-01
MR	Monitoring	Resolved	2020-01-01 → 2020-12-31
Other	Monitoring	Resolved	2016-07-01
MR	Monitoring	Resolved	2014-01-01 → 2019-12-31
MR	Monitoring	Resolved	2014-01-01 → 2019-12-31
MR	Monitoring	Resolved	2014-01-01 → 2019-12-31
MR	Monitoring	Resolved	2014-01-01 → 2019-12-31

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.

Contaminant	Level vs EPA limit	Detection rate	Source	Period
TTHM	64.8 µg/L 81% of the EPA limit 80 µg/L worst single sample: 78.8 µg/L	236/236	SYR4	2012–2019
Chloroform	61.76 µg/L No EPA limit set worst single sample: 73.9 µg/L	235/255	SYR4	2012–2019
Bromodichloromethane	3.995 µg/L No EPA limit set worst single sample: 6 µg/L	202/231	SYR4	2012–2019
Total Haloacetic Acids (HAA5)	44.25 µg/L 74% of the EPA limit 60 µg/L worst single sample: 53.9 µg/L	191/241	SYR4	2012–2019
Trichloroacetic Acid	27.36 µg/L No EPA limit set worst single sample: 34.7 µg/L	183/241	SYR4	2012–2019
Dichloroacetic Acid	19.11 µg/L No EPA limit set worst single sample: 21.9 µg/L	180/240	SYR4	2012–2019
Nitrate	590 µg/L 5.9% of the EPA limit 10000 µg/L worst single sample: 600 µg/L	66/80	SYR4	2012–2019
Dibromochloromethane	1.605 µg/L No EPA limit set worst single sample: 2.6 µg/L	60/246	SYR4	2012–2019
Nitrate-Nitrite	590 µg/L 5.9% of the EPA limit 10000 µg/L worst single sample: 600 µg/L	33/40	SYR4	2012–2019
Fluoride	804 µg/L 20% of the EPA limit 4000 µg/L worst single sample: 860 µg/L	17/17	SYR4	2012–2019
Arsenic	3.4875 µg/L 35% of the EPA limit 10 µg/L worst single sample: 3.6 µg/L	16/17	SYR4	2012–2019
Barium	19.155 µg/L 1% of the EPA limit 2000 µg/L worst single sample: 28.77 µg/L	16/17	SYR4	2012–2019
Copper	14.518 µg/L 1.1% of the EPA limit 1300 µg/L worst single sample: 14.56 µg/L	15/16	SYR4	2012–2019
Thallium, Total	0.9015 µg/L 45% of the EPA limit 2 µg/L worst single sample: 0.9600 µg/L	14/17	SYR4	2012–2019
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L	13/13	LCR	2024
Chromium	3.235 µg/L 3.2% of the EPA limit 100 µg/L worst single sample: 3.66 µg/L	11/17	SYR4	2012–2019
Lead	0.8380 µg/L 5.6% of the EPA limit 15 µg/L worst single sample: 0.8800 µg/L	8/16	SYR4	2012–2019
Monochloroacetic Acid	3.3 µg/L No EPA limit set worst single sample: 3.4 µg/L	6/249	SYR4	2012–2019
Antimony, Total	0.2740 µg/L 4.6% of the EPA limit 6 µg/L worst single sample: 0.2800 µg/L	4/17	SYR4	2012–2019
Bromoform	1.07 µg/L No EPA limit set worst single sample: 1.1 µg/L	2/260	SYR4	2012–2019
Selenium	1.581 µg/L 3.2% of the EPA limit 50 µg/L worst single sample: 1.62 µg/L	2/17	SYR4	2012–2019
Nitrite	50 µg/L 5% of the EPA limit 1000 µg/L	1/40	SYR4	2012–2019

82 contaminants tested, none detected

1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2,4-Trichlorobenzene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChlordaneDichloromethaneDalaponDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDibromoacetic AcidDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact: Daniel Tiliano

Frequently asked questions about Yakima Water Division City of

Is Yakima Water Division City of tap water safe to drink?

EPA monitoring detected 22 contaminants in Yakima Water Division City of'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 Yakima Water Division City of's water?

EPA monitoring detected TTHM, Chloroform, Bromodichloromethane, Total Haloacetic Acids (HAA5), Trichloroacetic Acid, and others. The full list with the level and data source for each is above.

How many people does Yakima Water Division City of serve?

Yakima Water Division City of reports serving 112,858 people in Washington, per its EPA record.

Has Yakima Water Division City of had any water quality violations?

The EPA has 57 violations on file for Yakima Water Division City of, of which 3 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.