What was found in Ashland'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 | 380 µg/L 3.8% of the EPA limit 10000 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019
Highest in the city: 11100 µg/L — ASHLAND WATER AND SEWER DIST · 400 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1845 µg/L 46% of the EPA limit 4000 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019
Highest in the city: 4245 µg/L — ASHLAND WATER AND SEWER DIST · 400 people · 2019 | 2/2 | SYR4 |
| Copper | 745.2 µg/L 57% of the EPA limit 1300 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2018 | 2/2 | SYR4 |
| TTHM | 189 µg/L 236% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Barium | 160 µg/L 8% of the EPA limit 2000 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 74.6 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Bromoform | 53.2 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 51.4 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 32.45 µg/L 54% of the EPA limit 60 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Chloroform | 25.9 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 15.86 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Lead | 10.3 µg/L 69% of the EPA limit 15 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2018 | 2/2 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 8.47 µg/L 141% of the EPA limit, at the 95th percentile of samples — 6 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Dichloroacetic Acid | 8.36 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 8.22 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Trichloroacetic Acid | 7.83 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Chromium | 7 µg/L 7% of the EPA limit 100 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Selenium | 6.75 µg/L 14% of the EPA limit 50 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Gross Beta Particle Activity | 4.7415 pCi/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2013 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.15755 pCi/L 23% of the EPA limit 5 pCi/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2016
Highest in the city: 4.5 pCi/L — ASHLAND WATER AND SEWER DIST · 400 people · 2018 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 2.061 pCi/L 14% of the EPA limit 15 pCi/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2016 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.495 µg/L No EPA limit set Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 2/2 | SYR4 |
| Toluene | 0.6700 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: ST LABRE INDIAN SCHOOL · 650 people · 2025
Highest in the city: 0.0080 mg/L — ASHLAND WATER AND SEWER DIST · 400 people · 2025 | 2/2 | 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 Ashland
| Supplier | Population served |
|---|---|
| ST LABRE INDIAN SCHOOL | 650 |
| ASHLAND WATER AND SEWER DIST | 400 |
Frequently asked questions about Ashland tap water
Is Ashland tap water safe to drink?
EPA testing detected 24 contaminants in the water serving Ashland. 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 Ashland?
2 public water suppliers report drinking-water monitoring for Ashland, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Ashland's water?
The contaminants EPA monitoring detected in Ashland include Nitrate-Nitrite, Fluoride, Copper, TTHM, 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.