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Tap water quality report

King County Water District 119

EPA monitoring tested this supplier for 41 contaminants and detected 8. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

41
contaminants tested
8
detected
3,800
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
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
3
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2021-07-01
Other Monitoring Resolved 2017-07-01
Other Monitoring Resolved 2012-07-01

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
Bromodichloromethane
3.2255 µg/L
No EPA limit set
worst single sample: 5.29 µg/L
62/62 SYR4 2012–2019
Chloroform
48.39 µg/L
No EPA limit set
worst single sample: 54.4 µg/L
62/62 SYR4 2012–2019
TTHM
50.876 µg/L 64%
of the EPA limit 80 µg/L
worst single sample: 56.67 µg/L
62/62 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
40.595 µg/L 68%
of the EPA limit 60 µg/L
worst single sample: 53.8 µg/L
58/62 SYR4 2012–2019
Trichloroacetic Acid
21.7 µg/L
No EPA limit set
worst single sample: 44.7 µg/L
56/62 SYR4 2012–2019
Dichloroacetic Acid
18.55 µg/L
No EPA limit set
worst single sample: 25.8 µg/L
51/62 SYR4 2012–2019
Monochloroacetic Acid
4.448 µg/L
No EPA limit set
worst single sample: 4.77 µg/L
15/62 SYR4 2012–2019
Dibromochloromethane
0.8640 µg/L
No EPA limit set
worst single sample: 0.8900 µg/L
3/62 SYR4 2012–2019
33 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
Thomas Shobert Jr

Frequently asked questions about King County Water District 119

Is King County Water District 119 tap water safe to drink?

EPA monitoring detected 8 contaminants in King County Water District 119'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 King County Water District 119's water?

EPA monitoring detected Bromodichloromethane, Chloroform, TTHM, 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 King County Water District 119 serve?

King County Water District 119 reports serving 3,800 people in Washington, per its EPA record.

Has King County Water District 119 had any water quality violations?

The EPA has 3 violations on file for King County Water District 119, 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.