Is College Place, WA Tap Water Safe? Quality & Contaminants

What was found in College Place'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	1000 µg/L 10% of the EPA limit 10000 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 Highest in the city: 11150 µg/L — WESTBOURNE ACRES · 94 people · 2019	4/4	SYR4
Nitrate-Nitrite	10048 µg/L 100% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Highest in the city: WESTBOURNE ACRES · 94 people · 2019	3/4	SYR4
Fluoride	605 µg/L 15% of the EPA limit 4000 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 Highest in the city: 3372.5 µg/L — WESTBOURNE ACRES · 94 people · 2019	4/4	SYR4
Nitrite	110 µg/L 11% of the EPA limit 1000 µg/L Highest in the city: WALLULA WATER DISTRICT · 200 people · 2016	1/4	SYR4
Barium	98.911 µg/L 4.9% of the EPA limit 2000 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	4/4	SYR4
Gross Beta Particle Activity	15.0385 pCi/L No EPA limit set Highest in the city: WALLULA WATER DISTRICT · 200 people · 2017	2/4	SYR4
Lithium	14.3 µg/L No EPA limit set Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2024	1/4	UCMR-5
Arsenic	6 µg/L 60% of the EPA limit 10 µg/L Highest in the city: WESTBOURNE ACRES · 94 people · 2019	2/4	SYR4
Copper	2.802 µg/L 0.2% of the EPA limit 1300 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 Highest in the city: 6 µg/L — WESTBOURNE ACRES · 94 people · 2019	2/4	SYR4
Lead	5 µg/L 33% of the EPA limit 15 µg/L Highest in the city: ARTESIAN WATER DISTRICT 8 · 302 people · 2018	1/4	SYR4
TTHM	2.2365 µg/L 2.8% of the EPA limit 80 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Selenium	2 µg/L 4% of the EPA limit 50 µg/L Highest in the city: WESTBOURNE ACRES · 94 people · 2019	1/4	SYR4
Chromium	1.06 µg/L 1.1% of the EPA limit 100 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019 Highest in the city: 1.95 µg/L — WESTBOURNE ACRES · 94 people · 2019	2/4	SYR4
Bromoform	1.33 µg/L No EPA limit set Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Dibromochloromethane	1.004 µg/L No EPA limit set Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Thallium, Total	0.3340 µg/L 17% of the EPA limit 2 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Chloroform	0.2800 µg/L No EPA limit set Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Antimony, Total	0.1600 µg/L 2.7% of the EPA limit 6 µg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2019	1/4	SYR4
Lead	0.0021 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: COLLEGE PLACE WATER DEPT · 8,147 people · 2023 Highest in the city: 0.0067 mg/L — WESTBOURNE ACRES · 94 people · 2025	4/4	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 College Place

Supplier	Population served
COLLEGE PLACE WATER DEPT	8,147
ARTESIAN WATER DISTRICT 8	302
WALLULA WATER DISTRICT	200
WESTBOURNE ACRES	94

Frequently asked questions about College Place tap water

Is College Place tap water safe to drink?

EPA testing detected 19 contaminants in the water serving College Place. 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 College Place?

4 public water suppliers report drinking-water monitoring for College Place, Washington to the EPA. Each is listed above with its population served.

What contaminants are in College Place's water?

The contaminants EPA monitoring detected in College Place include Nitrate, Nitrate-Nitrite, Fluoride, Nitrite, 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.