What was found in Park City'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 | 1670 µg/L 17% of the EPA limit 10000 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 3500 µg/L — HIGH VALLEY WATER CO · 850 people · 2019 | 6/6 | SYR4 |
| Nitrate-Nitrite | 1825 µg/L 18% of the EPA limit 10000 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2012 | 4/6 | SYR4 |
| Fluoride | 200 µg/L 5% of the EPA limit 4000 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 714.24 µg/L — SUMMIT COUNTY SERVICE AREA #3 · 600 people · 2018 | 6/6 | SYR4 |
| Copper | 324.9 µg/L 25% of the EPA limit 1300 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 492.1 µg/L — WANSHIP WATER CO. LLC · 79 people · 2019 | 6/6 | SYR4 |
| Barium | 94.3 µg/L 4.7% of the EPA limit 2000 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 335.8 µg/L — HIGH VALLEY WATER CO · 850 people · 2019 | 6/6 | SYR4 |
| TTHM | 47.025 µg/L 59% of the EPA limit 80 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 5/6 | SYR4 |
| Chloroform | 39.435 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 4/6 | SYR4 |
| Total Haloacetic Acids (HAA5) | 29.4 µg/L 49% of the EPA limit 60 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 5/6 | SYR4 |
| Lead | 5.65 µg/L 38% of the EPA limit 15 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 26.5 µg/L — WANSHIP WATER CO. LLC · 79 people · 2019 | 6/6 | SYR4 |
| Lithium | 12 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025
Highest in the city: 24 µg/L — GORGOZA MUTUAL WATER CO · 4,305 people · 2025 | 3/6 | UCMR-5 |
| Arsenic | 7.6 µg/L 76% of the EPA limit 10 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 20.15 µg/L — SUMMIT COUNTY SERVICE AREA #3 · 600 people · 2019 | 5/6 | SYR4 |
| Cyanide | 7.1 µg/L 3.6% of the EPA limit 200 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 17.35 µg/L — MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2019 | 5/6 | SYR4 |
| Trichloroacetic Acid | 16.1 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 4/6 | SYR4 |
| Dichloroacetic Acid | 14.1 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 4/6 | SYR4 |
| Bromodichloromethane | 8.98 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 9.545 µg/L — WANSHIP WATER CO. LLC · 79 people · 2019 | 5/6 | SYR4 |
| Dibromochloromethane | 1.9 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 8.32 µg/L — WANSHIP WATER CO. LLC · 79 people · 2019 | 5/6 | SYR4 |
| Selenium | 3.73 µg/L 7.5% of the EPA limit 50 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 8.255 µg/L — MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2019 | 6/6 | SYR4 |
| Chromium | 3.2 µg/L 3.2% of the EPA limit 100 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 8.24 µg/L — SUMMIT COUNTY SERVICE AREA #3 · 600 people · 2018 | 2/6 | SYR4 |
| Gross Beta Particle Activity | 6.29 pCi/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 8.17 pCi/L — MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2019 | 6/6 | SYR4 |
| Antimony, Total | 7.8 µg/L 130% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 2/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.04 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019
Highest in the city: 7.12 pCi/L — GORGOZA MUTUAL WATER CO · 4,305 people · 2019 | 6/6 | SYR4 |
| Cadmium | 3.35 µg/L 67% of the EPA limit 5 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 1/6 | SYR4 |
| Bromoform | 3.03 µg/L No EPA limit set Highest in the city: MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2019 | 4/6 | SYR4 |
| Dibromoacetic Acid | 2.67 µg/L No EPA limit set Highest in the city: GORGOZA MUTUAL WATER CO · 4,305 people · 2019 | 4/6 | SYR4 |
| Combined Radium (-226 And -228) | 1.17 pCi/L 23% of the EPA limit 5 pCi/L Highest in the city: GORGOZA MUTUAL WATER CO · 4,305 people · 2019 | 2/6 | SYR4 |
| Thallium, Total | 0.5000 µg/L 25% of the EPA limit 2 µg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2019 | 2/6 | SYR4 |
| Trichloroethylene | 0.5000 µg/L 10% of the EPA limit 5 µg/L Highest in the city: MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2019 | 1/6 | SYR4 |
| Asbestos | 0.1600 MFL 2.3% of the EPA limit 7 MFL Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2018 | 1/6 | SYR4 |
| 6:2 Fts | 0.0550 µg/L No EPA limit set Highest in the city: MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2023 | 1/6 | UCMR-5 |
| Pfpea | 0.0058 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025
Highest in the city: 0.0140 µg/L — MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2023 | 2/6 | UCMR-5 |
| Lead | 0.0019 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025
Highest in the city: 0.0082 mg/L — GORGOZA MUTUAL WATER CO · 4,305 people · 2025 | 6/6 | LCR |
| Pfhxa | 0.0042 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025
Highest in the city: 0.0081 µg/L — MOUNTAIN REGIONAL WATER SSD · 8,245 people · 2023 | 2/6 | UCMR-5 |
| PFOS | 0.0067 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025 | 1/6 | UCMR-5 |
| PFOA | 0.0048 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025 | 1/6 | UCMR-5 |
| PFBS | 0.0043 µg/L No EPA limit set Main supplier: PARK CITY WATER SYSTEM · 8,875 people · 2025 | 1/6 | 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 Park City
| Supplier | Population served |
|---|---|
| PARK CITY WATER SYSTEM | 8,875 |
| MOUNTAIN REGIONAL WATER SSD | 8,245 |
| GORGOZA MUTUAL WATER CO | 4,305 |
| HIGH VALLEY WATER CO | 850 |
| SUMMIT COUNTY SERVICE AREA #3 | 600 |
| WANSHIP WATER CO. LLC | 79 |
Frequently asked questions about Park City tap water
Is Park City tap water safe to drink?
EPA testing detected 35 contaminants in the water serving Park City. 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 Park City?
6 public water suppliers report drinking-water monitoring for Park City, Utah to the EPA. Each is listed above with its population served.
What contaminants are in Park City's water?
The contaminants EPA monitoring detected in Park City 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.