What was found in Moab'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 | 560.6 µg/L 5.6% of the EPA limit 10000 µg/L Main supplier: MOAB CITY · 9,000 people · 2015
Highest in the city: 8045.5 µg/L — ARCHES NATIONAL PARK HQ · 116 people · 2019 | 3/6 | SYR4 |
| Nitrate | 774.845 µg/L 7.7% of the EPA limit 10000 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 843.2 µg/L — DAY STAR ADVENTIST ACADEMY · 35 people · 2019 | 5/6 | SYR4 |
| Fluoride | 181 µg/L 4.5% of the EPA limit 4000 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 395.76 µg/L — DAY STAR ADVENTIST ACADEMY · 35 people · 2019 | 4/6 | SYR4 |
| Copper | 80.4 µg/L 6.2% of the EPA limit 1300 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 101.96 µg/L — THOMPSON SPECIAL SERVICES DISTRICT · 85 people · 2019 | 5/6 | SYR4 |
| TTHM | 0.5000 µg/L 0.6% of the EPA limit 80 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 84.105 µg/L — SORREL RIVER RANCH WATER · 260 people · 2019 | 4/6 | SYR4 |
| Barium | 74.675 µg/L 3.7% of the EPA limit 2000 µg/L Main supplier: MOAB CITY · 9,000 people · 2019 | 4/6 | SYR4 |
| Chloroform | 65.36 µg/L No EPA limit set Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 3/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 59.55 µg/L 99% of the EPA limit 60 µg/L Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 2/6 | SYR4 |
| Trichloroacetic Acid | 33.07 µg/L No EPA limit set Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 1/6 | SYR4 |
| Dichloroacetic Acid | 28.72 µg/L No EPA limit set Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 2/6 | SYR4 |
| Bromodichloromethane | 25.66 µg/L No EPA limit set Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 2/6 | SYR4 |
| Dibromochloromethane | 11.26 µg/L No EPA limit set Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2019 | 2/6 | SYR4 |
| Gross Beta Particle Activity | 1.975 pCi/L No EPA limit set Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 9.02 pCi/L — SORREL RIVER RANCH WATER · 260 people · 2019 | 4/6 | SYR4 |
| Bromoform | 8.72 µg/L No EPA limit set Highest in the city: THOMPSON SPECIAL SERVICES DISTRICT · 85 people · 2019 | 2/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.375 pCi/L 16% of the EPA limit 15 pCi/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 6.44 pCi/L — SORREL RIVER RANCH WATER · 260 people · 2019 | 5/6 | SYR4 |
| Selenium | 2.125 µg/L 4.3% of the EPA limit 50 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 4.66 µg/L — DAY STAR ADVENTIST ACADEMY · 35 people · 2019 | 4/6 | SYR4 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L Main supplier: MOAB CITY · 9,000 people · 2019 | 5/6 | SYR4 |
| Dibromoacetic Acid | 3.595 µg/L No EPA limit set Highest in the city: THOMPSON SPECIAL SERVICES DISTRICT · 85 people · 2019 | 2/6 | SYR4 |
| Cyanide | 2.6 µg/L 1.3% of the EPA limit 200 µg/L Main supplier: MOAB CITY · 9,000 people · 2019 | 2/6 | SYR4 |
| Arsenic | 0.8000 µg/L 8% of the EPA limit 10 µg/L Main supplier: MOAB CITY · 9,000 people · 2019
Highest in the city: 1.54 µg/L — DAY STAR ADVENTIST ACADEMY · 35 people · 2019 | 4/6 | SYR4 |
| Combined Radium (-226 And -228) | 0.7800 pCi/L 16% of the EPA limit 5 pCi/L Highest in the city: SORREL RIVER RANCH WATER · 260 people · 2018 | 2/6 | SYR4 |
| Xylenes, Total | 0.7000 µg/L 0% of the EPA limit 10000 µg/L Highest in the city: ARCHES NATIONAL PARK HQ · 116 people · 2015 | 1/6 | SYR4 |
| Cadmium | 0.6000 µg/L 12% of the EPA limit 5 µg/L Main supplier: MOAB CITY · 9,000 people · 2019 | 1/6 | SYR4 |
| Mercury | 0.3000 µg/L 15% of the EPA limit 2 µg/L Highest in the city: GRAND WATER AND SEWER AGENCY · 4,099 people · 2019 | 1/6 | SYR4 |
| Ethylbenzene | 0.2200 µg/L 0% of the EPA limit 700 µg/L Highest in the city: ARCHES NATIONAL PARK HQ · 116 people · 2015 | 1/6 | SYR4 |
| Toluene | 0.2000 µg/L 0% of the EPA limit 1000 µg/L Highest in the city: ARCHES NATIONAL PARK HQ · 116 people · 2015 | 1/6 | SYR4 |
| Lead | 0.0031 mg/L 21% of the EPA limit 0.0150 mg/L Main supplier: MOAB CITY · 9,000 people · 2025 | 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 Moab
| Supplier | Population served |
|---|---|
| MOAB CITY | 9,000 |
| GRAND WATER AND SEWER AGENCY | 4,099 |
| SORREL RIVER RANCH WATER | 260 |
| ARCHES NATIONAL PARK HQ | 116 |
| THOMPSON SPECIAL SERVICES DISTRICT | 85 |
| DAY STAR ADVENTIST ACADEMY | 35 |
Frequently asked questions about Moab tap water
Is Moab tap water safe to drink?
EPA testing detected 27 contaminants in the water serving Moab. 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 Moab?
6 public water suppliers report drinking-water monitoring for Moab, Utah to the EPA. Each is listed above with its population served.
What contaminants are in Moab's water?
The contaminants EPA monitoring detected in Moab include Nitrate-Nitrite, Nitrate, Fluoride, Copper, TTHM. 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.