What was found in Laurel'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 | 390 µg/L 3.9% of the EPA limit 10000 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 2250 µg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 2/5 | SYR4 |
| Fluoride | 495 µg/L 12% of the EPA limit 4000 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2018
Highest in the city: 597 µg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 2/5 | SYR4 |
| Copper | 138 µg/L 11% of the EPA limit 1300 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 302 µg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2018 | 4/5 | SYR4 |
| Lithium | 69.5 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2025 | 1/5 | UCMR-5 |
| TTHM | 55.15 µg/L 69% of the EPA limit 80 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 68.28 µg/L — SUNHAVEN MOBILE HOME PARK · 160 people · 2019 | 3/5 | SYR4 |
| Chloroform | 44.45 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 57.36 µg/L — SUNHAVEN MOBILE HOME PARK · 160 people · 2019 | 3/5 | SYR4 |
| Total Haloacetic Acids (HAA5) | 53.75 µg/L 90% of the EPA limit 60 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019 | 3/5 | SYR4 |
| Trichloroacetic Acid | 30.2 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019 | 3/5 | SYR4 |
| Dichloroacetic Acid | 21.55 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 29.62 µg/L — SUNHAVEN MOBILE HOME PARK · 160 people · 2019 | 3/5 | SYR4 |
| Barium | 26.89 µg/L 1.3% of the EPA limit 2000 µg/L Highest in the city: RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 1/5 | SYR4 |
| Dibromochloromethane | 2.6 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 14.6 µg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 3/5 | SYR4 |
| Arsenic | 14.2 µg/L 142% of the EPA limit, at the 95th percentile of samples — 10 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019 | 2/5 | SYR4 |
| Lead | 10.8 µg/L 72% of the EPA limit 15 µg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019 | 3/5 | SYR4 |
| Bromodichloromethane | 8.575 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 10.08 µg/L — SUNHAVEN MOBILE HOME PARK · 160 people · 2019 | 3/5 | SYR4 |
| Dibromoacetic Acid | 0.6600 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 6.4 µg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2018 | 3/5 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.16 pCi/L 34% of the EPA limit 15 pCi/L Highest in the city: RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2016 | 1/5 | SYR4 |
| Bromoform | 4.8 µg/L No EPA limit set Highest in the city: RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 1/5 | SYR4 |
| Monochloroacetic Acid | 3.02 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019
Highest in the city: 4.62 µg/L — SUNHAVEN MOBILE HOME PARK · 160 people · 2019 | 3/5 | SYR4 |
| Monobromoacetic Acid | 2.15 µg/L No EPA limit set Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2019 | 2/5 | SYR4 |
| Selenium | 1.9415 µg/L 3.9% of the EPA limit 50 µg/L Highest in the city: RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 1/5 | SYR4 |
| Combined Radium (-226 And -228) | 0.9000 pCi/L 18% of the EPA limit 5 pCi/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2013 | 2/5 | SYR4 |
| Chromium | 0.6600 µg/L 0.7% of the EPA limit 100 µg/L Highest in the city: RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2019 | 1/5 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Main supplier: LAUREL MUNICIPAL WATER SYSTEM · 6,339 people · 2025
Highest in the city: 0.0030 mg/L — RIO VISTA ESTATES HOA ASSOC INC · 50 people · 2027 | 5/5 | 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 Laurel
| Supplier | Population served |
|---|---|
| LAUREL MUNICIPAL WATER SYSTEM | 6,339 |
| GO 2 U WATER DELIVERY | 200 |
| SUNHAVEN MOBILE HOME PARK | 160 |
| FOX WATER SERVICE INCORPORATED | 60 |
| RIO VISTA ESTATES HOA ASSOC INC | 50 |
Frequently asked questions about Laurel tap water
Is Laurel tap water safe to drink?
EPA testing detected 23 contaminants in the water serving Laurel. 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 Laurel?
5 public water suppliers report drinking-water monitoring for Laurel, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Laurel's water?
The contaminants EPA monitoring detected in Laurel include Nitrate-Nitrite, Fluoride, Copper, Lithium, TTHM. 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.