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Tap water quality report

Umatilla, OR

EPA monitoring detected 9 contaminants across the 2 water suppliers serving Umatilla. A detection doesn't automatically mean the water is unsafe — see the level at the main supplier for each below, with its EPA source and period.

2
water suppliers
8,326
people served
9
contaminants found
Oregon rankings Lead in Oregon PFAS in Oregon

What was found in Umatilla's water

The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.

ContaminantLevel vs EPA limitSuppliersSource
Fluoride
960 µg/L 24%
of the EPA limit 4000 µg/L
Highest in the city: POWER CITY WATER CO-OP · 70 people · 2019
1/2 SYR4
Copper
88.66 µg/L 6.8%
of the EPA limit 1300 µg/L
Highest in the city: POWER CITY WATER CO-OP · 70 people · 2017
1/2 SYR4
TTHM
25.15 µg/L 31%
of the EPA limit 80 µg/L
Main supplier: UMATILLA, CITY OF · 8,256 people · 2019
Highest in the city: 80.2 µg/L — POWER CITY WATER CO-OP · 70 people · 2018
2/2 SYR4
Lithium
33.2 µg/L
No EPA limit set
Main supplier: UMATILLA, CITY OF · 8,256 people · 2023
1/2 UCMR-5
Total Haloacetic Acids (HAA5)
1.856 µg/L 3.1%
of the EPA limit 60 µg/L
Main supplier: UMATILLA, CITY OF · 8,256 people · 2019
Highest in the city: 31.91 µg/L — POWER CITY WATER CO-OP · 70 people · 2018
2/2 SYR4
Lead
2 µg/L 13%
of the EPA limit 15 µg/L
Main supplier: UMATILLA, CITY OF · 8,256 people · 2018
2/2 SYR4
Arsenic
1.18 µg/L 12%
of the EPA limit 10 µg/L
Highest in the city: POWER CITY WATER CO-OP · 70 people · 2019
1/2 SYR4
Selenium
1 µg/L 2%
of the EPA limit 50 µg/L
Highest in the city: POWER CITY WATER CO-OP · 70 people · 2019
1/2 SYR4
Lead
0.0 mg/L 0%
of the EPA limit 0.0150 mg/L
Main supplier: UMATILLA, CITY OF · 8,256 people · 2024
2/2 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 95th percentile of the system's samples — 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 Umatilla

SupplierPopulation served
UMATILLA, CITY OF 8,256
POWER CITY WATER CO-OP 70

Frequently asked questions about Umatilla tap water

Is Umatilla tap water safe to drink?

EPA testing detected 9 contaminants in the water serving Umatilla. 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 Umatilla?

2 public water suppliers report drinking-water monitoring for Umatilla, Oregon to the EPA. Each is listed above with its population served.

What contaminants are in Umatilla's water?

The contaminants EPA monitoring detected in Umatilla include Fluoride, Copper, TTHM, Lithium, Total Haloacetic Acids (HAA5). The full list, with the level at the main supplier 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.