Is Washington, IN Tap Water Safe? Quality & Contaminants

What was found in Washington'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	1040 µg/L 10% of the EPA limit 10000 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2019	1/2	SYR4
Fluoride	892.15 µg/L 22% of the EPA limit 4000 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2017	1/2	SYR4
Copper	172.99999999999994 µg/L 13% of the EPA limit 1300 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2017 Highest in the city: 218.19999999999953 µg/L — DAVIESS COUNTY RURAL WATER · 7,969 people · 2019	2/2	SYR4
TTHM	54.919999999999995 µg/L 69% of the EPA limit 80 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2019	2/2	SYR4
Lead	23.425 µg/L 156% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2017	2/2	SYR4
Total Haloacetic Acids (HAA5)	19.825 µg/L 33% of the EPA limit 60 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2019 Highest in the city: 19.979999999999997 µg/L — DAVIESS COUNTY RURAL WATER · 7,969 people · 2019	2/2	SYR4
Gross Alpha, Excl. Radon And U	3.2 pCi/L 21% of the EPA limit 15 pCi/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2017	1/2	SYR4
Bromodichloromethane	2.9 µg/L No EPA limit set Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2014	1/2	SYR4
Chloroform	2.9 µg/L No EPA limit set Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2014	1/2	SYR4
Dibromochloromethane	1.9 µg/L No EPA limit set Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2014	1/2	SYR4
Combined Uranium	1.0701 µg/L 3.6% of the EPA limit 30 µg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2017	1/2	SYR4
Lead	0.0130 mg/L 87% of the EPA limit 0.0150 mg/L Main supplier: WASHINGTON WATER WORKS · 13,690 people · 2023	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 Washington

Supplier	Population served
WASHINGTON WATER WORKS	13,690
DAVIESS COUNTY RURAL WATER	7,969

Frequently asked questions about Washington tap water

Is Washington tap water safe to drink?

EPA testing detected 12 contaminants in the water serving Washington. 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 Washington?

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

What contaminants are in Washington's water?

The contaminants EPA monitoring detected in Washington include Nitrate, Fluoride, Copper, TTHM, Lead. 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.