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Tap water quality report

Rainier, OR

EPA monitoring detected 15 contaminants across the 6 water suppliers serving Rainier. A detection doesn't automatically mean the water is unsafe — see the highest level found for each below, with its EPA source and period.

6
water suppliers
2,597
people served
15
contaminants found
Oregon rankings Lead in Oregon PFAS in Oregon

What was found in Rainier'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
Nitrate
2900 µg/L 29%
of the EPA limit 10000 µg/L
 5/6 SYR4
Nitrate-Nitrite
2350 µg/L 24%
of the EPA limit 10000 µg/L
 2/6 SYR4
Copper
280 µg/L 22%
of the EPA limit 1300 µg/L
 5/6 SYR4
Fluoride
140 µg/L 3.5%
of the EPA limit 4000 µg/L
 2/6 SYR4
Barium
76 µg/L 3.8%
of the EPA limit 2000 µg/L
 2/6 SYR4
TTHM
69.77 µg/L 87%
of the EPA limit 80 µg/L
 4/6 SYR4
Endothall
47 µg/L 47%
of the EPA limit 100 µg/L
 1/6 SYR4
Arsenic
32 µg/L 320%
of the EPA limit, in the worst sample — 10 µg/L
 1/6 SYR4
Total Haloacetic Acids (HAA5)
17.9 µg/L 30%
of the EPA limit 60 µg/L
 4/6 SYR4
Lead
12 µg/L 80%
of the EPA limit 15 µg/L
 5/6 SYR4
Gross Alpha, Excl. Radon And U
7.18 pCi/L 48%
of the EPA limit 15 pCi/L
 2/6 SYR4
Diquat
2.6 µg/L 13%
of the EPA limit 20 µg/L
 1/6 SYR4
Xylenes, Total
1.3 µg/L 0%
of the EPA limit 10000 µg/L
 1/6 SYR4
Combined Radium (-226 And -228)
0.9000 pCi/L 18%
of the EPA limit 5 pCi/L
 1/6 SYR4
Lead
0.0041 mg/L 27%
of the EPA limit 0.0150 mg/L
 6/6 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 Rainier

SupplierPopulation served
CITY OF RAINIER 1,932
WESTERN HILLS MH ESTATES 375
DEER VIEW COOPERATIVE 90
GOBLE WATER ASSOCIATION 85
PRESCOTT, CITY OF 70
J & M MOBILE HOME PARK 45

Frequently asked questions about Rainier tap water

Is Rainier tap water safe to drink?

EPA testing detected 15 contaminants in the water serving Rainier. 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 Rainier?

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

What contaminants are in Rainier's water?

The contaminants EPA monitoring detected in Rainier include Nitrate, Nitrate-Nitrite, Copper, Fluoride, Barium. 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.