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Tap water quality report

West Linn, City of

EPA monitoring tested this supplier for 35 contaminants and detected 5. A detection doesn't automatically mean the water is unsafe — the level and EPA source for each is below.

35
contaminants tested
5
detected
28,000
people served
0
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
SWP
Ownership
Local government
Counties served
Clackamas

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
MR Monitoring Resolved 2016-07-01 → 2016-09-30
MR Monitoring Resolved 2016-07-01 → 2016-09-30
MR Monitoring Resolved 1995-06-01 → 1995-06-30
MR Monitoring Resolved 1995-05-01 → 1995-05-31

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
44.325 µg/L 55%
of the EPA limit 80 µg/L
worst single sample: 47.4 µg/L
128/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
47.265 µg/L 79%
of the EPA limit 60 µg/L
worst single sample: 51 µg/L
128/128 SYR4 2012–2019
Lead
0.0018 mg/L 12%
of the EPA limit 0.0150 mg/L
 27/27 LCR 2024
Copper
90.8 µg/L 7%
of the EPA limit 1300 µg/L
worst single sample: 95 µg/L
13/92 SYR4 2012–2018
Lead
12.2 µg/L 81%
of the EPA limit 15 µg/L
worst single sample: 14 µg/L
10/92 SYR4 2012–2018
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
WEST LINN, CITY OF
Phone
503-742-6083
Email
[email protected]

Frequently asked questions about West Linn, City of

Is West Linn, City of tap water safe to drink?

EPA monitoring detected 5 contaminants in West Linn, 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 West Linn, City of's water?

EPA monitoring detected TTHM, Total Haloacetic Acids (HAA5), Lead, Copper, Lead. The full list with the level and data source for each is above.

How many people does West Linn, City of serve?

West Linn, City of reports serving 28,000 people in Oregon, per its EPA record.

Has West Linn, City of had any water quality violations?

The EPA has 4 violations on file for West Linn, 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.