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Tap water quality report

Renton City of

EPA monitoring tested this supplier for 87 contaminants and detected 15. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

87
contaminants tested
15
detected
108,091
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
King

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.

0
health-based violations
58
violations on file
0
still open
ViolationTypeStatusPeriod
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2006-01-01 → 2006-12-31
MR Monitoring Resolved 2002-01-01 → 2004-12-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0030 µg/L 1/6 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
18 µg/L 23%
of the EPA limit 80 µg/L
worst single sample: 21.4 µg/L
89/89 SYR4 2012–2019
Chloroform
9.66 µg/L
No EPA limit set
worst single sample: 13.6 µg/L
88/94 SYR4 2012–2019
Bromodichloromethane
5.68 µg/L
No EPA limit set
worst single sample: 6.7 µg/L
83/88 SYR4 2012–2019
Dibromochloromethane
2.8 µg/L
No EPA limit set
worst single sample: 3.2 µg/L
69/80 SYR4 2012–2019
Nitrate
2200 µg/L 22%
of the EPA limit 10000 µg/L
 64/64 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
7.2 µg/L 12%
of the EPA limit 60 µg/L
worst single sample: 7.7 µg/L
52/87 SYR4 2012–2019
Dichloroacetic Acid
3.15 µg/L
No EPA limit set
worst single sample: 3.9 µg/L
51/87 SYR4 2012–2019
Bromoform
0.9000 µg/L
No EPA limit set
 20/97 SYR4 2012–2019
Trichloroacetic Acid
4.3 µg/L
No EPA limit set
 20/91 SYR4 2012–2019
Lead
0.0019 mg/L 13%
of the EPA limit 0.0150 mg/L
 11/11 LCR 2025
Fluoride
717 µg/L 18%
of the EPA limit 4000 µg/L
worst single sample: 720 µg/L
4/4 SYR4 2016–2019
Arsenic
1.4 µg/L 14%
of the EPA limit 10 µg/L
 1/4 SYR4 2016–2019
Copper
20 µg/L 1.5%
of the EPA limit 1300 µg/L
 1/4 SYR4 2016–2019
Nitrate-Nitrite
2090 µg/L 21%
of the EPA limit 10000 µg/L
 1/4 SYR4 2016–2019
72 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-PF3ONSAdonaAntimony, TotalBariumBenzeneBeryllium, TotalChlorobenzeneCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEthylbenzeneHfpo-DaLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
Joshua ONeill

Frequently asked questions about Renton City of

Is Renton City of tap water safe to drink?

EPA monitoring detected 15 contaminants in Renton 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 Renton City of's water?

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

How many people does Renton City of serve?

Renton City of reports serving 108,091 people in Washington, per its EPA record.

Has Renton City of had any water quality violations?

The EPA has 58 violations on file for Renton City of, of which 0 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.