What was found in Jackson'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-Nitrite | 1445 µg/L 14% of the EPA limit 10000 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 10000 µg/L — J-W SUBDIVISION ASSOCIATION · 40 people · 2019 | 21/24 | SYR4 |
| Nitrate | 8900 µg/L 89% of the EPA limit 10000 µg/L Highest in the city: SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 3/24 | SYR4 |
| Fluoride | 400 µg/L 10% of the EPA limit 4000 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 1880 µg/L — MELODY RANCH IMPROVEMENT & SERVICE DIST. · 900 people · 2019 | 21/24 | SYR4 |
| Copper | 271 µg/L 21% of the EPA limit 1300 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 1870 µg/L — RIVERMEADOWS WATER DISTRICT · 100 people · 2019 | 21/24 | SYR4 |
| Barium | 390 µg/L 20% of the EPA limit 2000 µg/L Highest in the city: OLD WEST CABINS · 70 people · 2017 | 7/24 | SYR4 |
| TTHM | 3.5715 µg/L 4.5% of the EPA limit 80 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 37.75 µg/L — VALLEY VIEW MUTUAL WATER COMPANY · 100 people · 2018 | 13/24 | SYR4 |
| Bromoform | 1.1685 µg/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 25.9 µg/L — VALLEY VIEW MUTUAL WATER COMPANY · 100 people · 2018 | 8/24 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.45 µg/L 2.4% of the EPA limit 60 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 16.65 µg/L — SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 12/24 | SYR4 |
| Arsenic | 4 µg/L 40% of the EPA limit 10 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 13.8 µg/L — SNAKE RIVER SPORTING CLUB · 332 people · 2019 | 16/24 | SYR4 |
| Lead | 5.7 µg/L 38% of the EPA limit 15 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 11.1 µg/L — SNAKE RIVER SPORTING CLUB · 332 people · 2019 | 19/24 | SYR4 |
| Chloroform | 0.7450 µg/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 11 µg/L — SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 9/24 | SYR4 |
| Dichloroacetic Acid | 10 µg/L No EPA limit set Highest in the city: SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 4/24 | SYR4 |
| Dibromochloromethane | 1.64 µg/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 9.915 µg/L — SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 11/24 | SYR4 |
| Bromodichloromethane | 0.7960 µg/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 9.74 µg/L — SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 11/24 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.08 pCi/L 14% of the EPA limit 15 pCi/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2017
Highest in the city: 7.7 pCi/L — SOUTH PARK VILLAGE SUBDIVISION · 65 people · 2019 | 18/24 | SYR4 |
| Selenium | 7 µg/L 14% of the EPA limit 50 µg/L Highest in the city: J-W SUBDIVISION ASSOCIATION · 40 people · 2018 | 6/24 | SYR4 |
| Trichloroacetic Acid | 6.34 µg/L No EPA limit set Highest in the city: SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 1/24 | SYR4 |
| Dibromoacetic Acid | 0.9310 µg/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2019
Highest in the city: 6.035 µg/L — J-W SUBDIVISION ASSOCIATION · 40 people · 2017 | 11/24 | SYR4 |
| Combined Radium (-226 And -228) | 4.445 pCi/L 89% of the EPA limit 5 pCi/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2017
Highest in the city: 5.215 pCi/L — RIVERMEADOWS WATER DISTRICT · 100 people · 2019 | 15/24 | SYR4 |
| Gross Beta Particle Activity | 5.135 pCi/L No EPA limit set Main supplier: JACKSON, TOWN OF · 24,760 people · 2017 | 1/24 | SYR4 |
| Thallium, Total | 3.4 µg/L 170% of the EPA limit, at the 95th percentile of samples — 2 µg/L Highest in the city: RIVERMEADOWS WATER DISTRICT · 100 people · 2019 | 4/24 | SYR4 |
| Combined Uranium | 0.5900 µg/L 2% of the EPA limit 30 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2017
Highest in the city: 3 µg/L — OLD WEST CABINS · 70 people · 2017 | 16/24 | SYR4 |
| Antimony, Total | 2 µg/L 33% of the EPA limit 6 µg/L Highest in the city: SNAKE RIVER MOBILE HOME PARK · 100 people · 2019 | 1/24 | SYR4 |
| Benzene | 1.8 µg/L 36% of the EPA limit 5 µg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2019 | 1/24 | SYR4 |
| Trichloroethylene | 1.765 µg/L 35% of the EPA limit 5 µg/L Highest in the city: OLD WEST CABINS · 70 people · 2019 | 1/24 | SYR4 |
| cis-1,2-Dichloroethylene | 1.74 µg/L 2.5% of the EPA limit 70 µg/L Highest in the city: OLD WEST CABINS · 70 people · 2019 | 1/24 | SYR4 |
| Tetrachloroethylene | 1.665 µg/L 33% of the EPA limit 5 µg/L Highest in the city: OLD WEST CABINS · 70 people · 2019 | 1/24 | SYR4 |
| Cadmium | 1 µg/L 20% of the EPA limit 5 µg/L Highest in the city: OLD WEST CABINS · 70 people · 2017 | 1/24 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: JACKSON, TOWN OF · 24,760 people · 2026
Highest in the city: 0.0080 mg/L — SQUAW CREEK WATER DISTRICT · 160 people · 2025 | 24/24 | 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 Jackson
Frequently asked questions about Jackson tap water
Is Jackson tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Jackson. 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 Jackson?
24 public water suppliers report drinking-water monitoring for Jackson, Wyoming to the EPA. Each is listed above with its population served.
What contaminants are in Jackson's water?
The contaminants EPA monitoring detected in Jackson include Nitrate-Nitrite, Nitrate, 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.