What was found in Tooele'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 | 4518.34 µg/L 45% of the EPA limit 10000 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 2/2 | SYR4 |
| Nitrate-Nitrite | 2895 µg/L 29% of the EPA limit 10000 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2014 | 1/2 | SYR4 |
| Fluoride | 200 µg/L 5% of the EPA limit 4000 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 2/2 | SYR4 |
| Copper | 186.59 µg/L 14% of the EPA limit 1300 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2017 | 2/2 | SYR4 |
| Barium | 116.5 µg/L 5.8% of the EPA limit 2000 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 2/2 | SYR4 |
| Lithium | 36.1 µg/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2025 | 1/2 | UCMR-5 |
| Lead | 5.46 µg/L 36% of the EPA limit 15 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2017
Highest in the city: 10.1 µg/L — OPHIR CANYON WATER ASSOCIATION · 108 people · 2017 | 2/2 | SYR4 |
| TTHM | 7.04 µg/L 8.8% of the EPA limit 80 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 6.67 pCi/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Bromoform | 6.47 µg/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.9 pCi/L 33% of the EPA limit 15 pCi/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Selenium | 2.335 µg/L 4.7% of the EPA limit 50 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019
Highest in the city: 3.8 µg/L — OPHIR CANYON WATER ASSOCIATION · 108 people · 2019 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 3.75 µg/L 63% of the EPA limit 6 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 2.52 pCi/L 50% of the EPA limit 5 pCi/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Cyanide | 2.285 µg/L 1.1% of the EPA limit 200 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Thallium, Total | 1.9 µg/L 95% of the EPA limit 2 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 1.595 µg/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 1.47 µg/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Arsenic | 1.4 µg/L 14% of the EPA limit 10 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 0.6950 µg/L No EPA limit set Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Mercury | 0.2000 µg/L 10% of the EPA limit 2 µg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0026 mg/L 17% of the EPA limit 0.0150 mg/L Main supplier: TOOELE CITY WATER SYSTEM · 37,100 people · 2023
Highest in the city: 0.0041 mg/L — OPHIR CANYON WATER ASSOCIATION · 108 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 Tooele
| Supplier | Population served |
|---|---|
| TOOELE CITY WATER SYSTEM | 37,100 |
| OPHIR CANYON WATER ASSOCIATION | 108 |
Frequently asked questions about Tooele tap water
Is Tooele tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Tooele. 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 Tooele?
2 public water suppliers report drinking-water monitoring for Tooele, Utah to the EPA. Each is listed above with its population served.
What contaminants are in Tooele's water?
The contaminants EPA monitoring detected in Tooele 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.