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Tap water quality report

Tualatin, OR

EPA monitoring detected 10 contaminants across the 1 water supplier serving Tualatin. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

1
water supplier
28,106
people served
10
contaminants found
Oregon rankings Lead in Oregon PFAS in Oregon

What was found in Tualatin's water

The highest level seen across the city's suppliers, the EPA limit for each, and where the figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Copper
941 µg/L 72%
of the EPA limit 1300 µg/L
 1/1 SYR4
Lead
648 µg/L 4320%
of the EPA limit, in the worst sample — 15 µg/L
 1/1 SYR4
Fluoride
190 µg/L 4.8%
of the EPA limit 4000 µg/L
 1/1 SYR4
Nitrate
109 µg/L 1.1%
of the EPA limit 10000 µg/L
 1/1 SYR4
TTHM
70.9 µg/L 89%
of the EPA limit 80 µg/L
 1/1 SYR4
Total Haloacetic Acids (HAA5)
49.4 µg/L 82%
of the EPA limit 60 µg/L
 1/1 SYR4
Barium
32 µg/L 1.6%
of the EPA limit 2000 µg/L
 1/1 SYR4
Bromate
0.7000 µg/L 7%
of the EPA limit 10 µg/L
 1/1 SYR4
Combined Uranium
0.0830 µg/L 0.3%
of the EPA limit 30 µg/L
 1/1 SYR4
Lead
0.0049 mg/L 33%
of the EPA limit 0.0150 mg/L
 1/1 LCR
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 single worst sample on record — over 100% is worth reading, but is not by itself a violation. Formal violations are listed separately. These are the utilities' own EPA-reported results, not a city-wide average. A detection means the lab measured the substance — it isn't the same as exceeding a legal limit. Hover a source tag to see the EPA program and years behind each figure.

Water suppliers serving Tualatin

SupplierPopulation served
TUALATIN, CITY OF 28,106

Frequently asked questions about Tualatin tap water

Is Tualatin tap water safe to drink?

EPA testing detected 10 contaminants in the water serving Tualatin. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.

How many water suppliers serve Tualatin?

1 public water supplier report drinking-water monitoring for Tualatin, Oregon to the EPA. Each is listed above with its population served.

What contaminants are in Tualatin's water?

The contaminants EPA monitoring detected in Tualatin include Copper, Lead, Fluoride, Nitrate, TTHM. The full list, with the highest level found and the data source, is in the table above.

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.