What was found in Herriman'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 | 4150 µg/L 42% of the EPA limit 10000 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Nitrate-Nitrite | 1000 µg/L 10% of the EPA limit 10000 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2012 | 1/3 | SYR4 |
| Copper | 548.86 µg/L 42% of the EPA limit 1300 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2017 | 3/3 | SYR4 |
| Fluoride | 524.76 µg/L 13% of the EPA limit 4000 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Barium | 267 µg/L 13% of the EPA limit 2000 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| TTHM | 71.815 µg/L 90% of the EPA limit 80 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Chloroform | 55.58 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Total Haloacetic Acids (HAA5) | 44.085 µg/L 73% of the EPA limit 60 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Lithium | 33 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2023 | 1/3 | UCMR-5 |
| Bromoform | 26.22 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Gross Beta Particle Activity | 23.65 pCi/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Trichloroacetic Acid | 22.86 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Dichloroacetic Acid | 21.595 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Gross Alpha, Excl. Radon And U | 9.1 pCi/L 61% of the EPA limit 15 pCi/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019
Highest in the city: 15.39 pCi/L — HI-COUNTRY ESTATES #1 · 373 people · 2019 | 2/3 | SYR4 |
| Bromodichloromethane | 14.46 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Lead | 12.335 µg/L 82% of the EPA limit 15 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2017 | 3/3 | SYR4 |
| Dibromochloromethane | 11.605 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Selenium | 8.16 µg/L 16% of the EPA limit 50 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019
Highest in the city: 8.52 µg/L — HI-COUNTRY ESTATES #1 · 373 people · 2019 | 3/3 | SYR4 |
| Arsenic | 5.795 µg/L 58% of the EPA limit 10 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019
Highest in the city: 7.59 µg/L — HI-COUNTRY ESTATES #1 · 373 people · 2019 | 3/3 | SYR4 |
| Dibromoacetic Acid | 6.7885 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 3/3 | SYR4 |
| Monochloroacetic Acid | 2.646 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 1/3 | SYR4 |
| Combined Radium (-226 And -228) | 2.325 pCi/L 47% of the EPA limit 5 pCi/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 2/3 | SYR4 |
| Cyanide | 2 µg/L 1% of the EPA limit 200 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 1/3 | SYR4 |
| Xylenes, Total | 2 µg/L 0% of the EPA limit 10000 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 1/3 | SYR4 |
| Monobromoacetic Acid | 1.7555 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 1/3 | SYR4 |
| Pentachlorophenol | 0.1520 µg/L 15% of the EPA limit 1 µg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2019 | 1/3 | SYR4 |
| Pfhxa | 0.0085 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2024 | 1/3 | UCMR-5 |
| Lead | 0.0038 mg/L 25% of the EPA limit 0.0150 mg/L Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2025 | 3/3 | LCR |
| Pfpea | 0.0035 µg/L No EPA limit set Main supplier: HERRIMAN CITY MUNICIPAL WATER DEPARTMENT · 60,000 people · 2024 | 1/3 | UCMR-5 |
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 Herriman
| Supplier | Population served |
|---|---|
| HERRIMAN CITY MUNICIPAL WATER DEPARTMENT | 60,000 |
| HI-COUNTRY NUMBER 2 | 722 |
| HI-COUNTRY ESTATES #1 | 373 |
Frequently asked questions about Herriman tap water
Is Herriman tap water safe to drink?
EPA testing detected 29 contaminants in the water serving Herriman. 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 Herriman?
3 public water suppliers report drinking-water monitoring for Herriman, Utah to the EPA. Each is listed above with its population served.
What contaminants are in Herriman's water?
The contaminants EPA monitoring detected in Herriman include Nitrate, Nitrate-Nitrite, Copper, Fluoride, 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.