Is Afton, WY Tap Water Safe? Quality & Contaminants

What was found in Afton'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	5600 µg/L 56% of the EPA limit 10000 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2013	2/6	SYR4
Nitrate-Nitrite	3890 µg/L 39% of the EPA limit 10000 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	6/6	SYR4
Fluoride	400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019 Highest in the city: 470 µg/L — WESTVIEW VILLAGE · 83 people · 2019	4/6	SYR4
Copper	443 µg/L 34% of the EPA limit 1300 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	5/6	SYR4
Barium	100 µg/L 5% of the EPA limit 2000 µg/L Highest in the city: OSMOND I&S DISTRICT · 315 people · 2019	1/6	SYR4
Lead	6.1 µg/L 41% of the EPA limit 15 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019 Highest in the city: 13.4 µg/L — OSMOND I&S DISTRICT · 315 people · 2019	5/6	SYR4
Gross Alpha, Excl. Radon And U	4.1 pCi/L 27% of the EPA limit 15 pCi/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019 Highest in the city: 5.1 pCi/L — FAIRVIEW WATER & SEWER DISTRICT · 230 people · 2019	5/6	SYR4
TTHM	3.65 µg/L 4.6% of the EPA limit 80 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Chloroform	3.075 µg/L No EPA limit set Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Total Haloacetic Acids (HAA5)	2.29 µg/L 3.8% of the EPA limit 60 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Dichloroacetic Acid	1.79 µg/L No EPA limit set Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Combined Uranium	1.2963 µg/L 4.3% of the EPA limit 30 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	5/6	SYR4
Combined Radium (-226 And -228)	0.7000 pCi/L 14% of the EPA limit 5 pCi/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019 Highest in the city: 1.1 pCi/L — WESTVIEW VILLAGE · 83 people · 2019	4/6	SYR4
Thallium, Total	0.7000 µg/L 35% of the EPA limit 2 µg/L Highest in the city: WESTVIEW VILLAGE · 83 people · 2019	2/6	SYR4
Trichloroacetic Acid	0.5670 µg/L No EPA limit set Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Bromodichloromethane	0.5385 µg/L No EPA limit set Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Ethylene Dibromide	0.0342 µg/L 68% of the EPA limit 0.0500 µg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2019	1/6	SYR4
Lead	0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: AFTON, BOARD OF PUB UTILITIES · 2,000 people · 2025 Highest in the city: 0.0050 mg/L — FAIRVIEW WATER & SEWER DISTRICT · 230 people · 2024	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 Afton

Supplier	Population served
AFTON, BOARD OF PUB UTILITIES	2,000
OSMOND I&S DISTRICT	315
FAIRVIEW WATER & SEWER DISTRICT	230
STAR VIEW ESTATES	84
WESTVIEW VILLAGE	83
STAR VALLEY TRAILER COURT	72

Frequently asked questions about Afton tap water

Is Afton tap water safe to drink?

EPA testing detected 18 contaminants in the water serving Afton. 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 Afton?

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

What contaminants are in Afton's water?

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