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Tap water quality report

Sequim City of

EPA monitoring tested this supplier for 88 contaminants and detected 13. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

88
contaminants tested
13
detected
14,293
people served
0
health-based violations
Washington rankingsLead in WashingtonPFAS in Washington
Water source
Ground water
Ownership
Local government
Counties served
Clallam

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
11
violations on file
0
still open
ViolationTypeStatusPeriod
Other Monitoring Resolved 2024-07-01
Other Monitoring Resolved 1999-10-19 → 1999-12-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31
MR Monitoring Archived 1979-10-01 → 1979-10-31

PFAS detected

PFAS are industrial “forever chemicals”. These are the EPA's latest nationwide test results (2023–2025).
ContaminantMaxDetection ratePeriod
PFBS 0.0058 µg/L 2/6 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
Nitrate
2820 µg/L 28%
of the EPA limit 10000 µg/L
 62/76 SYR4 2013–2019
Bromodichloromethane
3.58 µg/L
No EPA limit set
worst single sample: 4.1 µg/L
14/21 SYR4 2013–2019
Chloroform
17.1 µg/L
No EPA limit set
worst single sample: 18.4 µg/L
14/21 SYR4 2013–2019
TTHM
19.855 µg/L 25%
of the EPA limit 80 µg/L
worst single sample: 20.7 µg/L
14/14 SYR4 2013–2019
Lead
0.0021 mg/L 14%
of the EPA limit 0.0150 mg/L
 13/13 LCR 2025
Total Haloacetic Acids (HAA5)
5.78 µg/L 9.6%
of the EPA limit 60 µg/L
worst single sample: 6 µg/L
12/14 SYR4 2013–2019
Trichloroacetic Acid
4.08 µg/L
No EPA limit set
worst single sample: 4.3 µg/L
12/14 SYR4 2013–2019
Dibromochloromethane
1.575 µg/L
No EPA limit set
worst single sample: 1.6 µg/L
6/21 SYR4 2013–2019
Dichloroacetic Acid
2.275 µg/L
No EPA limit set
worst single sample: 2.4 µg/L
6/13 SYR4 2013–2019
Arsenic
1.7 µg/L 17%
of the EPA limit 10 µg/L
 4/5 SYR4 2016–2017
Nitrate-Nitrite
450 µg/L 4.5%
of the EPA limit 10000 µg/L
 4/5 SYR4 2016–2017
Fluoride
130 µg/L 3.3%
of the EPA limit 4000 µg/L
 1/5 SYR4 2016–2017
75 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, TotalAsbestosBariumBenzeneBeryllium, TotalBromoformChlorobenzeneCopperCyanideCadmiumCarbon TetrachlorideChromiumDichloromethaneDalaponDibromoacetic AcidDinosebEthylene DibromideEthylbenzeneHfpo-DaLeadMercuryMonobromoacetic AcidMonochloroacetic AcidNetfosaaNfdhaNmefosaaNitritePfbaPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaPentachlorophenolPicloramSeleniumStyreneTetrachloroethyleneThallium, TotalTolueneTrichloroethyleneVinyl ChlorideXylenes, Totalcis-1,2-DichloroethyleneLithiumO-DichlorobenzeneP-Dichlorobenzenetrans-1,2-Dichloroethylene

Utility contact

Contact
John Christenson

Frequently asked questions about Sequim City of

Is Sequim City of tap water safe to drink?

EPA monitoring detected 13 contaminants in Sequim 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 Sequim City of's water?

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

How many people does Sequim City of serve?

Sequim City of reports serving 14,293 people in Washington, per its EPA record.

Has Sequim City of had any water quality violations?

The EPA has 11 violations on file for Sequim 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.