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Tap water quality report

Richland City of

EPA monitoring tested this supplier for 105 contaminants and detected 33. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

105
contaminants tested
33
detected
106,499
people served
1
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Surface water
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
45
violations on file
0
still open
ViolationTypeStatusPeriod
MCL Health-based Archived 1993-06-01 → 1993-06-30
MR Monitoring Archived 2019-04-01 → 2019-06-30
MR Monitoring Archived 2019-04-01 → 2019-06-30
MR Monitoring Archived 2019-04-01 → 2019-06-30
MR Monitoring Archived 2019-04-01 → 2019-06-30
MR Monitoring Archived 2019-04-01 → 2019-06-30
MR Monitoring Resolved 2018-10-01 → 2018-12-31
MR Monitoring Resolved 2018-10-01 → 2018-12-31
MR Monitoring Resolved 2018-10-01 → 2018-12-31
MR Monitoring Resolved 2018-10-01 → 2018-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0089 µg/L 2/10 2023
Pfhxa 0.0116 µg/L 2/10 2023
PFHXS 0.0054 µg/L 2/10 2023
PFOA 0.0101 µg/L 2/10 2023
PFOS 0.0170 µg/L 2/10 2023
Pfpea 0.0145 µg/L 2/10 2023
Pfba 0.0066 µg/L 1/10 2023
Pfhpa 0.0058 µg/L 1/10 2023

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
68.353 µg/L 85%
of the EPA limit 80 µg/L
worst single sample: 91.39 µg/L
275/275 SYR4 2012–2019
Chloroform
60.98 µg/L
No EPA limit set
worst single sample: 81.09 µg/L
267/268 SYR4 2012–2019
Bromodichloromethane
7.598 µg/L
No EPA limit set
worst single sample: 8.63 µg/L
265/268 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
51.01 µg/L 85%
of the EPA limit 60 µg/L
worst single sample: 63.39 µg/L
256/256 SYR4 2012–2019
Dichloroacetic Acid
21.55 µg/L
No EPA limit set
worst single sample: 30.6 µg/L
251/251 SYR4 2012–2019
Trichloroacetic Acid
33.29 µg/L
No EPA limit set
worst single sample: 37.9 µg/L
248/248 SYR4 2012–2019
Dibromochloromethane
7.828 µg/L
No EPA limit set
worst single sample: 14.1137 µg/L
185/267 SYR4 2012–2019
Bromoform
6.4 µg/L
No EPA limit set
worst single sample: 14.4165 µg/L
158/263 SYR4 2012–2019
Dibromoacetic Acid
2.28 µg/L
No EPA limit set
worst single sample: 2.48 µg/L
69/256 SYR4 2012–2019
Nitrate
3196 µg/L 32%
of the EPA limit 10000 µg/L
worst single sample: 3300 µg/L
34/46 SYR4 2012–2019
Copper
22.725 µg/L 1.7%
of the EPA limit 1300 µg/L
worst single sample: 46.8 µg/L
16/17 SYR4 2012–2019
Barium
83.11 µg/L 4.2%
of the EPA limit 2000 µg/L
worst single sample: 86.4 µg/L
15/15 SYR4 2012–2019
Lead
0.0024 mg/L 16%
of the EPA limit 0.0150 mg/L
 15/15 LCR 2024
Monochloroacetic Acid
1.425 µg/L
No EPA limit set
worst single sample: 1.59 µg/L
11/256 SYR4 2012–2019
Nitrate-Nitrite
3040 µg/L 30%
of the EPA limit 10000 µg/L
worst single sample: 3140 µg/L
11/15 SYR4 2012–2019
Monobromoacetic Acid
1.1085 µg/L
No EPA limit set
worst single sample: 1.14 µg/L
10/256 SYR4 2012–2019
Arsenic
5.4585 µg/L 55%
of the EPA limit 10 µg/L
worst single sample: 5.56 µg/L
8/15 SYR4 2012–2019
Fluoride
227.25 µg/L 5.7%
of the EPA limit 4000 µg/L
worst single sample: 229 µg/L
8/15 SYR4 2012–2019
Selenium
1.812 µg/L 3.6%
of the EPA limit 50 µg/L
worst single sample: 1.84 µg/L
5/15 SYR4 2012–2019
1,2,4-Trichlorobenzene
0.0994 µg/L 0.1%
of the EPA limit 70 µg/L
worst single sample: 0.1000 µg/L
3/20 SYR4 2012–2019
Chlorobenzene
0.0200 µg/L 0%
of the EPA limit 100 µg/L
 1/20 SYR4 2012–2019
Chromium
1.78 µg/L 1.8%
of the EPA limit 100 µg/L
 1/15 SYR4 2012–2019
Dalapon
1.17 µg/L 0.6%
of the EPA limit 200 µg/L
 1/7 SYR4 2013–2019
Tetrachloroethylene
2.74 µg/L 55%
of the EPA limit 5 µg/L
 1/20 SYR4 2012–2019
Xylenes, Total
0.0700 µg/L 0%
of the EPA limit 10000 µg/L
 1/20 SYR4 2012–2019
72 contaminants tested, none detected
1,1,1-Trichloroethane1,1,2-Trichloroethane1,1-Dichloroethylene1,2-DIBROMO-3-CHLOROPROPANE1,2-Dichloroethane1,2-Dichloropropane11Cl-PF3OUdS2,4,5-TP2,4-D4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaAntimony, TotalAsbestosAtrazineBhc-GammaBenzeneBenzo(A)PyreneBeryllium, TotalCyanideCadmiumCarbon TetrachlorideChlordaneDichloromethaneDi(2-ethylhexyl) AdipateDi(2-ethylhexyl) PhthalateDinosebEthylene DibromideEndrinEthylbenzeneGross Beta Particle ActivityHexachlorobenzeneHfpo-DaHeptachlorHeptachlor EpoxideHexachlorocyclopentadieneLassoLeadMercuryMethoxychlorNetfosaaNfdhaNmefosaaNitritePfdaPfdoaPfeesaPfhpsPfmbaPfmpaPFNAPfpesPftaPftrdaPfunaPentachlorophenolPicloramSimazineStyreneThallium, TotalTolueneTotal Polychlorinated Biphenyls (PCB)ToxapheneTrichloroethyleneVinyl Chloridecis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Thomas (Pat) Everham, Jr

Frequently asked questions about Richland City of

Is Richland City of tap water safe to drink?

EPA monitoring detected 33 contaminants in 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 Richland City of's water?

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

How many people does Richland City of serve?

Richland City of reports serving 106,499 people in Washington, per its EPA record.

Has Richland City of had any water quality violations?

The EPA has 45 violations on file for 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.