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Tap water quality report

Tukwila Water Department

EPA monitoring tested this supplier for 41 contaminants and detected 11. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

41
contaminants tested
11
detected
36,298
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
SWP
Ownership
Local government
Counties served
King

Compliance record

No violations on file. The EPA has no formal drinking-water violations recorded for this supplier.

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
Chloroform
41.285 µg/L
No EPA limit set
worst single sample: 53.2 µg/L
124/124 SYR4 2012–2019
TTHM
43.834 µg/L 55%
of the EPA limit 80 µg/L
worst single sample: 55.5 µg/L
124/124 SYR4 2012–2019
Trichloroacetic Acid
25.5 µg/L
No EPA limit set
worst single sample: 34.5 µg/L
124/124 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
42.865 µg/L 71%
of the EPA limit 60 µg/L
worst single sample: 62.5 µg/L
120/120 SYR4 2012–2019
Bromodichloromethane
2.521 µg/L
No EPA limit set
worst single sample: 10.7 µg/L
118/119 SYR4 2012–2019
Dichloroacetic Acid
19.58 µg/L
No EPA limit set
worst single sample: 28 µg/L
118/118 SYR4 2012–2019
Monochloroacetic Acid
4.511 µg/L
No EPA limit set
worst single sample: 5.31 µg/L
48/124 SYR4 2012–2019
Bromoform
1.018 µg/L
No EPA limit set
worst single sample: 1.04 µg/L
2/124 SYR4 2012–2019
Dibromoacetic Acid
1.31 µg/L
No EPA limit set
 1/124 SYR4 2012–2019
Dibromochloromethane
4.8 µg/L
No EPA limit set
 1/124 SYR4 2012–2019
Monobromoacetic Acid
1.69 µg/L
No EPA limit set
 1/124 SYR4 2012–2019
30 contaminants tested, none detected
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Utility contact

Contact
Bryan Still

Frequently asked questions about Tukwila Water Department

Is Tukwila Water Department tap water safe to drink?

EPA monitoring detected 11 contaminants in Tukwila Water Department'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 Tukwila Water Department's water?

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

How many people does Tukwila Water Department serve?

Tukwila Water Department reports serving 36,298 people in Washington, per its EPA record.

Has Tukwila Water Department had any water quality violations?

The EPA has no formal drinking-water violations on file for Tukwila Water Department.

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.