Is Osage, WY Tap Water Safe? Quality & Contaminants

What was found in Osage'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
Fluoride	490 µg/L 12% of the EPA limit 4000 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Nitrate-Nitrite	250 µg/L 2.5% of the EPA limit 10000 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2019	1/1	SYR4
Copper	173.15 µg/L 13% of the EPA limit 1300 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2017	1/1	SYR4
Barium	120 µg/L 6% of the EPA limit 2000 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Lead	4.75 µg/L 32% of the EPA limit 15 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2017	1/1	SYR4
Gross Alpha, Excl. Radon And U	3.33 pCi/L 22% of the EPA limit 15 pCi/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Arsenic	2.9 µg/L 29% of the EPA limit 10 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Combined Radium (-226 And -228)	2.14 pCi/L 43% of the EPA limit 5 pCi/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Combined Uranium	1.9639 µg/L 6.5% of the EPA limit 30 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Selenium	1.9 µg/L 3.8% of the EPA limit 50 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
TTHM	1.78 µg/L 2.2% of the EPA limit 80 µg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Bromodichloromethane	0.6700 µg/L No EPA limit set Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Dibromochloromethane	0.6500 µg/L No EPA limit set Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Chloroform	0.5960 µg/L No EPA limit set Main supplier: OSAGE WATER DISTRICT · 200 people · 2018	1/1	SYR4
Lead	0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: OSAGE WATER DISTRICT · 200 people · 2023	1/1	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 Osage

Supplier	Population served
OSAGE WATER DISTRICT	200

Frequently asked questions about Osage tap water

Is Osage tap water safe to drink?

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

1 public water supplier report drinking-water monitoring for Osage, Wyoming to the EPA. Each is listed above with its population served.

What contaminants are in Osage's water?

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