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Tap water quality report

West Richland City of

EPA monitoring tested this supplier for 104 contaminants and detected 21. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

104
contaminants tested
21
detected
21,231
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Local government
Counties served
Benton

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.

1
health-based violations
62
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1996-04-01 → 1996-04-30
MR Monitoring Resolved 2021-01-01 → 2021-12-31
MR Monitoring Resolved 2020-01-01 → 2020-03-31
MR Monitoring Resolved 2020-01-01 → 2020-03-31
Other Monitoring Resolved 2015-07-01
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30
MR Monitoring Resolved 2008-07-01 → 2008-09-30

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
TTHM
71.97 µg/L 90%
of the EPA limit 80 µg/L
worst single sample: 79 µg/L
130/130 SYR4 2012–2019
Chloroform
64.2 µg/L
No EPA limit set
worst single sample: 72.3 µg/L
125/139 SYR4 2012–2019
Bromodichloromethane
8.8 µg/L
No EPA limit set
worst single sample: 10.9 µg/L
124/136 SYR4 2012–2019
Dibromochloromethane
11.65 µg/L
No EPA limit set
worst single sample: 16.1 µg/L
116/130 SYR4 2012–2019
Bromoform
7.29 µg/L
No EPA limit set
worst single sample: 10.9 µg/L
112/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
47.5 µg/L 79%
of the EPA limit 60 µg/L
worst single sample: 60.3 µg/L
109/128 SYR4 2012–2019
Dichloroacetic Acid
21.05 µg/L
No EPA limit set
worst single sample: 23.7 µg/L
91/130 SYR4 2012–2019
Trichloroacetic Acid
28.845 µg/L
No EPA limit set
worst single sample: 36.6 µg/L
72/130 SYR4 2012–2019
Dibromoacetic Acid
6.4 µg/L
No EPA limit set
worst single sample: 8.3 µg/L
66/126 SYR4 2012–2019
Nitrate
3400 µg/L 34%
of the EPA limit 10000 µg/L
worst single sample: 3600 µg/L
54/84 SYR4 2012–2019
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
 14/14 LCR 2024
Fluoride
3190.5 µg/L 80%
of the EPA limit 4000 µg/L
worst single sample: 3600 µg/L
4/4 SYR4 2012–2019
Lithium
31.9 µg/L
No EPA limit set
 4/8 UCMR-5 2024
Arsenic
3.9 µg/L 39%
of the EPA limit 10 µg/L
worst single sample: 4 µg/L
3/6 SYR4 2012–2019
Barium
77.355 µg/L 3.9%
of the EPA limit 2000 µg/L
worst single sample: 79 µg/L
2/4 SYR4 2012–2019
Chromium
1.019 µg/L 1%
of the EPA limit 100 µg/L
worst single sample: 1.02 µg/L
2/4 SYR4 2012–2019
Monochloroacetic Acid
2.29 µg/L
No EPA limit set
worst single sample: 2.3 µg/L
2/131 SYR4 2012–2019
Nitrate-Nitrite
3012 µg/L 30%
of the EPA limit 10000 µg/L
worst single sample: 3100 µg/L
2/4 SYR4 2012–2019
Antimony, Total
0.0500 µg/L 0.8%
of the EPA limit 6 µg/L
 1/6 SYR4 2012–2019
Copper
1.71 µg/L 0.1%
of the EPA limit 1300 µg/L
 1/4 SYR4 2012–2019
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
 1/6 SYR4 2012–2019
83 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) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorMonobromoacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneTetrachloroethyleneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Roscoe Slade III

Frequently asked questions about West Richland City of

Is West Richland City of tap water safe to drink?

EPA monitoring detected 21 contaminants in West Richland 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 West Richland City of's water?

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

How many people does West Richland City of serve?

West Richland City of reports serving 21,231 people in Washington, per its EPA record.

Has West Richland City of had any water quality violations?

The EPA has 62 violations on file for West Richland City of, of which 1 is 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.