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Tap water quality report

Northshore Utility District

EPA monitoring tested this supplier for 42 contaminants and detected 9. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

42
contaminants tested
9
detected
99,789
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
4
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2015-07-01
Other Monitoring Resolved 2014-07-01
MR Monitoring Resolved 1992-01-01 → 1993-01-01
MR Monitoring Archived 1979-10-01 → 1979-10-31

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
43.729 µg/L 55%
of the EPA limit 80 µg/L
worst single sample: 57.47 µg/L
247/247 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
40.86 µg/L 68%
of the EPA limit 60 µg/L
worst single sample: 51.6 µg/L
243/243 SYR4 2012–2019
Chloroform
39.515 µg/L
No EPA limit set
worst single sample: 49.2 µg/L
238/238 SYR4 2012–2019
Dichloroacetic Acid
19 µg/L
No EPA limit set
worst single sample: 22.9 µg/L
235/236 SYR4 2012–2019
Trichloroacetic Acid
22.26 µg/L
No EPA limit set
worst single sample: 29.1 µg/L
229/229 SYR4 2012–2019
Bromodichloromethane
3.2095 µg/L
No EPA limit set
worst single sample: 9.44 µg/L
202/202 SYR4 2012–2019
Monochloroacetic Acid
3.215 µg/L
No EPA limit set
worst single sample: 18.6 µg/L
91/237 SYR4 2012–2019
Dibromochloromethane
9.212 µg/L
No EPA limit set
worst single sample: 14 µg/L
9/248 SYR4 2012–2019
Lead
0.0360 mg/L 240%
above the EPA limit of 0.0150 mg/L
 2/2 LCR 1992
33 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaBromoformDibromoacetic AcidHfpo-DaMonobromoacetic AcidNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
Thomas Vane

Frequently asked questions about Northshore Utility District

Is Northshore Utility District tap water safe to drink?

EPA monitoring detected 9 contaminants in Northshore Utility District'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 Northshore Utility District's water?

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

How many people does Northshore Utility District serve?

Northshore Utility District reports serving 99,789 people in Washington, per its EPA record.

Has Northshore Utility District had any water quality violations?

The EPA has 4 violations on file for Northshore Utility District, 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.