What was found in Running Springs'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 | 952000 µg/L 9520% of the EPA limit, at the 95th percentile of samples — 10000 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Nitrate | 1514.2 µg/L 15% of the EPA limit 10000 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Fluoride | 185 µg/L 4.6% of the EPA limit 4000 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019
Highest in the city: 229 µg/L — SMILEY PARK COUNTRY CLUB · 370 people · 2017 | 2/2 | SYR4 |
| Lithium | 106 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Combined Uranium | 84.93 µg/L 283% of the EPA limit, at the 95th percentile of samples — 30 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 2/2 | SYR4 |
| TTHM | 42.845 µg/L 54% of the EPA limit 80 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Bromoform | 27.12 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Dibromochloromethane | 12.8 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Arsenic | 9.56 µg/L 96% of the EPA limit 10 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 6.025 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.975 µg/L 10% of the EPA limit 60 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Chloroform | 5.2 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 4.4 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 1.08 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2019 | 1/2 | SYR4 |
| Dichloromethane | 0.9600 µg/L 19% of the EPA limit 5 µg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2018 | 1/2 | SYR4 |
| PFOS | 0.2365 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| PFHXS | 0.0955 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Pfhxa | 0.0190 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| PFOA | 0.0159 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Pfpea | 0.0144 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Pfhpa | 0.0128 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| PFBS | 0.0117 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Pfpes | 0.0108 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Lead | 0.0081 mg/L 54% of the EPA limit 0.0150 mg/L Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 2/2 | LCR |
| Pfba | 0.0056 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | UCMR-5 |
| Pfhps | 0.0055 µg/L No EPA limit set Main supplier: RUNNING SPRINGS WATER DISTRICT · 5,268 people · 2025 | 1/2 | 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 Running Springs
| Supplier | Population served |
|---|---|
| RUNNING SPRINGS WATER DISTRICT | 5,268 |
| SMILEY PARK COUNTRY CLUB | 370 |
Frequently asked questions about Running Springs tap water
Is Running Springs tap water safe to drink?
EPA testing detected 26 contaminants in the water serving Running Springs. 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 Running Springs?
2 public water suppliers report drinking-water monitoring for Running Springs, California to the EPA. Each is listed above with its population served.
What contaminants are in Running Springs's water?
The contaminants EPA monitoring detected in Running Springs include Nitrate-Nitrite, Nitrate, Fluoride, Lithium, Combined Uranium. 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.