What was found in Pablo'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 | 238 µg/L 2.4% of the EPA limit 10000 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019
Highest in the city: 1565 µg/L — CHIEF MARTIN CHARLO HOMESITE · 66 people · 2019 | 18/18 | SYR4 |
| Nitrate | 130 µg/L 1.3% of the EPA limit 10000 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019
Highest in the city: 1390 µg/L — ARLEE · 124 people · 2018 | 18/18 | SYR4 |
| Fluoride | 319 µg/L 8% of the EPA limit 4000 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019
Highest in the city: 1190 µg/L — MISSION DAM WATER SYSTEM · 87 people · 2018 | 18/18 | SYR4 |
| Copper | 534 µg/L 41% of the EPA limit 1300 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2017 | 18/18 | SYR4 |
| Barium | 59.5 µg/L 3% of the EPA limit 2000 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019
Highest in the city: 330 µg/L — CHIEF MARTIN CHARLO HOMESITE · 66 people · 2018 | 17/18 | SYR4 |
| Lead | 23.2 µg/L 155% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2017
Highest in the city: 27.6 µg/L — GRAY WOLF VILLAGE · 32 people · 2018 | 12/18 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019
Highest in the city: 21.875 µg/L — DIXON (OLD AGENCY) · 72 people · 2019 | 5/18 | SYR4 |
| Combined Uranium | 14.75 µg/L 49% of the EPA limit 30 µg/L Highest in the city: BIG ARM WATER SYSTEM · 116 people · 2018 | 9/18 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.5 pCi/L 23% of the EPA limit 15 pCi/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2016
Highest in the city: 8.225 pCi/L — BIG ARM WATER SYSTEM · 116 people · 2018 | 7/18 | SYR4 |
| Combined Radium (-226 And -228) | 3.6 pCi/L 72% of the EPA limit 5 pCi/L Highest in the city: HOULE VILLA WATER SYSTEM · 50 people · 2016 | 14/18 | SYR4 |
| Total Haloacetic Acids (HAA5) | 1.6 µg/L 2.7% of the EPA limit 60 µg/L Highest in the city: DIXON (OLD AGENCY) · 72 people · 2018 | 3/18 | SYR4 |
| TTHM | 1.468 µg/L 1.8% of the EPA limit 80 µg/L Highest in the city: ARLEE · 124 people · 2018 | 3/18 | SYR4 |
| Monochloroacetic Acid | 1.4 µg/L No EPA limit set Highest in the city: DIXON (OLD AGENCY) · 72 people · 2018 | 1/18 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.1 µg/L 18% of the EPA limit 6 µg/L Highest in the city: CHIEF MARTIN CHARLO HOMESITE · 66 people · 2018 | 1/18 | SYR4 |
| Toluene | 1.1 µg/L 0.1% of the EPA limit 1000 µg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2019 | 1/18 | SYR4 |
| Dibromoacetic Acid | 0.9120 µg/L No EPA limit set Highest in the city: DIXON (OLD AGENCY) · 72 people · 2018 | 2/18 | SYR4 |
| Dichloroacetic Acid | 0.7800 µg/L No EPA limit set Highest in the city: DIXON (OLD AGENCY) · 72 people · 2018 | 2/18 | SYR4 |
| Bromoform | 0.5700 µg/L No EPA limit set Highest in the city: DIXON (OLD AGENCY) · 72 people · 2019 | 1/18 | SYR4 |
| Bromodichloromethane | 0.5300 µg/L No EPA limit set Highest in the city: ARLEE · 124 people · 2018 | 1/18 | SYR4 |
| Dibromochloromethane | 0.5200 µg/L No EPA limit set Highest in the city: ARLEE · 124 people · 2018 | 1/18 | SYR4 |
| Trichloroacetic Acid | 0.5200 µg/L No EPA limit set Highest in the city: WOODCOCK WATER SYSTEM · 101 people · 2018 | 1/18 | SYR4 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L Main supplier: PABLO LAKE COUNTY WATER AND SEWER DIST · 2,175 people · 2017
Highest in the city: 0.0100 mg/L — DIXON (OLD AGENCY) · 72 people · 2025 | 18/18 | 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 Pablo
| Supplier | Population served |
|---|---|
| PABLO LAKE COUNTY WATER AND SEWER DIST | 2,175 |
| ST IGNATIUS (MISSION) SO.SIDE | 356 |
| PACHE WATER SYSTEM | 276 |
| TURTLE LAKE WATER SYSTEM | 225 |
| ELMO WATER SYSTEM | 220 |
| DIXON, TOWN OF | 200 |
| ARLEE | 124 |
| BIG ARM WATER SYSTEM | 116 |
| WOODCOCK WATER SYSTEM | 101 |
| MISSION DAM WATER SYSTEM | 87 |
| SCHLEY WATER SYSTEM | 85 |
| DIXON (OLD AGENCY) | 72 |
| CHIEF MARTIN CHARLO HOMESITE | 66 |
| HOULE VILLA WATER SYSTEM | 50 |
| EVARO WATER SYSTEM | 40 |
| CLARICE PAUL WATER SYSTEM | 35 |
| GRAY WOLF VILLAGE | 32 |
| DAYTON WATER SYSTEM | 25 |
Frequently asked questions about Pablo tap water
Is Pablo tap water safe to drink?
EPA testing detected 22 contaminants in the water serving Pablo. 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 Pablo?
18 public water suppliers report drinking-water monitoring for Pablo, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Pablo's water?
The contaminants EPA monitoring detected in Pablo include Nitrate-Nitrite, Nitrate, 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.