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Tap water quality report

West Slope Water District

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
11,000
people served
11
health-based violations
Oregon rankingsLead in OregonPFAS in Oregon
Water source
SWP
Ownership
Local government
Counties served
Washington

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.

11
health-based violations
28
violations on file
0
still open
ViolationTypeStatusPeriod
TT Health-based Resolved 2018-03-11
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2011-10-01 → 2011-10-31
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 2010-10-01 → 2010-10-31
MCL Health-based Resolved 1995-11-01 → 1995-11-30

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
Copper
402 µg/L 31%
of the EPA limit 1300 µg/L
worst single sample: 941 µg/L
1738/1821 SYR4 2012–2019
Lead
22.545 µg/L 150%
of the EPA limit, at the 95th percentile of samples — 15 µg/L
worst single sample: 648 µg/L
1672/1821 SYR4 2012–2019
TTHM
48.265 µg/L 60%
of the EPA limit 80 µg/L
worst single sample: 55.5 µg/L
128/128 SYR4 2012–2019
Total Haloacetic Acids (HAA5)
48.52 µg/L 81%
of the EPA limit 60 µg/L
worst single sample: 53.1 µg/L
128/128 SYR4 2012–2019
Lead
0.0049 mg/L 33%
of the EPA limit 0.0150 mg/L
 62/62 LCR 2025
30 contaminants tested, none detected
11Cl-PF3OUdS4:2 Fts6:2 Fts8:2 Fts9Cl-PF3ONSAdonaHfpo-DaNetfosaaNfdhaNmefosaaPfbaPFBSPfdaPfdoaPfeesaPfhpaPfhpsPfhxaPFHXSPfmbaPfmpaPFNAPFOAPFOSPfpeaPfpesPftaPftrdaPfunaLithium

Utility contact

Contact
WEST SLOPE WATER DISTRICT
Phone
503-292-2777
Email
[email protected]

Frequently asked questions about West Slope Water District

Is West Slope Water District tap water safe to drink?

EPA monitoring detected 5 contaminants in West Slope Water 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 West Slope Water District's water?

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

How many people does West Slope Water District serve?

West Slope Water District reports serving 11,000 people in Oregon, per its EPA record.

Has West Slope Water District had any water quality violations?

The EPA has 28 violations on file for West Slope Water District, of which 11 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.