Is Rainier, OR Tap Water Safe? Quality & Contaminants

What was found in Rainier'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.

Contaminant	Level vs EPA limit	Suppliers	Source
Nitrate	270 µg/L 2.7% of the EPA limit 10000 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019 Highest in the city: 2900 µg/L — GOBLE WATER ASSOCIATION · 85 people · 2019	5/6	SYR4
Nitrate-Nitrite	110 µg/L 1.1% of the EPA limit 10000 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2013 Highest in the city: 2294 µg/L — GOBLE WATER ASSOCIATION · 85 people · 2019	2/6	SYR4
Copper	57.95 µg/L 4.5% of the EPA limit 1300 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2018 Highest in the city: 279.9 µg/L — WESTERN HILLS MH ESTATES · 375 people · 2017	5/6	SYR4
Fluoride	139.5 µg/L 3.5% of the EPA limit 4000 µg/L Highest in the city: GOBLE WATER ASSOCIATION · 85 people · 2019	2/6	SYR4
Barium	76 µg/L 3.8% of the EPA limit 2000 µg/L Highest in the city: PRESCOTT, CITY OF · 70 people · 2013	2/6	SYR4
TTHM	66.6155 µg/L 83% of the EPA limit 80 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019	4/6	SYR4
Endothall	47 µg/L 47% of the EPA limit 100 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019	1/6	SYR4
Total Haloacetic Acids (HAA5)	15.64 µg/L 26% of the EPA limit 60 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019 Highest in the city: 17.9 µg/L — WESTERN HILLS MH ESTATES · 375 people · 2019	4/6	SYR4
Lead	5.4 µg/L 36% of the EPA limit 15 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2018 Highest in the city: 11.1 µg/L — GOBLE WATER ASSOCIATION · 85 people · 2018	5/6	SYR4
Arsenic	10.2 µg/L 102% of the EPA limit, at the 95th percentile of samples — 10 µg/L Highest in the city: PRESCOTT, CITY OF · 70 people · 2019	1/6	SYR4
Gross Alpha, Excl. Radon And U	7.18 pCi/L 48% of the EPA limit 15 pCi/L Highest in the city: DEER VIEW COOPERATIVE · 90 people · 2019	2/6	SYR4
Diquat	2.6 µg/L 13% of the EPA limit 20 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019	1/6	SYR4
Xylenes, Total	1.3 µg/L 0% of the EPA limit 10000 µg/L Main supplier: CITY OF RAINIER · 1,932 people · 2019	1/6	SYR4
Combined Radium (-226 And -228)	0.9000 pCi/L 18% of the EPA limit 5 pCi/L Highest in the city: PRESCOTT, CITY OF · 70 people · 2019	1/6	SYR4
Lead	0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: CITY OF RAINIER · 1,932 people · 2026 Highest in the city: 0.0041 mg/L — DEER VIEW COOPERATIVE · 90 people · 2026	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 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 Rainier

Supplier	Population 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 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.