What was found in Lolo'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 | 1297 µg/L 13% of the EPA limit 10000 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019
Highest in the city: 3740 µg/L — VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2019 | 6/6 | SYR4 |
| Nitrate | 1220 µg/L 12% of the EPA limit 10000 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019 | 2/6 | SYR4 |
| Barium | 106.5 µg/L 5.3% of the EPA limit 2000 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019
Highest in the city: 300 µg/L — VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2012 | 2/6 | SYR4 |
| Copper | 143.5 µg/L 11% of the EPA limit 1300 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019
Highest in the city: 285 µg/L — VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2019 | 6/6 | SYR4 |
| Fluoride | 120 µg/L 3% of the EPA limit 4000 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019
Highest in the city: 190 µg/L — SHELBY ADDITION WATER DISTRICT · 145 people · 2012 | 6/6 | SYR4 |
| Lead | 5.2 µg/L 35% of the EPA limit 15 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019
Highest in the city: 12.8 µg/L — VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2019 | 6/6 | SYR4 |
| Combined Uranium | 3.9 µg/L 13% of the EPA limit 30 µg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2016 | 2/6 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.03 pCi/L 20% of the EPA limit 15 pCi/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2016
Highest in the city: 3.61 pCi/L — VALLEY WEST TRAILER COURT · 115 people · 2016 | 2/6 | SYR4 |
| Combined Radium (-226 And -228) | 3.37 pCi/L 67% of the EPA limit 5 pCi/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2019 | 3/6 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Highest in the city: VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2017 | 1/6 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: LOLO WATER AND SEWER DIST · 3,315 people · 2027
Highest in the city: 0.0100 mg/L — VALLEY GROVE WATER USERS ASSOCIATION · 30 people · 2019 | 6/6 | LCR |
Water suppliers serving Lolo
| Supplier | Population served |
|---|---|
| LOLO WATER AND SEWER DIST | 3,315 |
| SHELBY ADDITION WATER DISTRICT | 145 |
| BITTERROOT GATEWAY MB PK LOLO | 130 |
| VALLEY WEST TRAILER COURT | 115 |
| BRANCO COURT | 37 |
| VALLEY GROVE WATER USERS ASSOCIATION | 30 |
Frequently asked questions about Lolo tap water
Is Lolo tap water safe to drink?
EPA testing detected 11 contaminants in the water serving Lolo. 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 Lolo?
6 public water suppliers report drinking-water monitoring for Lolo, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Lolo's water?
The contaminants EPA monitoring detected in Lolo include Nitrate-Nitrite, Nitrate, Barium, Copper, Fluoride. 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.