What was found in Poplar'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 |
|---|---|---|---|
| Copper | 1782.5 µg/L 137% of the EPA limit, at the 95th percentile of samples — 1300 µg/L Main supplier: POPLAR, CITY OF · 3,025 people · 2019
Highest in the city: 2042 µg/L — ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 2/2 | SYR4 |
| Fluoride | 1100 µg/L 28% of the EPA limit 4000 µg/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 1/2 | SYR4 |
| Nitrate-Nitrite | 873 µg/L 8.7% of the EPA limit 10000 µg/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 1/2 | SYR4 |
| Nitrate | 360 µg/L 3.6% of the EPA limit 10000 µg/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2013 | 1/2 | SYR4 |
| TTHM | 80.6 µg/L 101% of the EPA limit, at the 95th percentile of samples — 80 µg/L Main supplier: POPLAR, CITY OF · 3,025 people · 2019
Highest in the city: 92 µg/L — ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 59.1 µg/L 99% of the EPA limit 60 µg/L Main supplier: POPLAR, CITY OF · 3,025 people · 2019
Highest in the city: 78.1 µg/L — ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 2/2 | SYR4 |
| Lead | 18.95 µg/L 126% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: POPLAR, CITY OF · 3,025 people · 2019
Highest in the city: 49.4 µg/L — ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 2/2 | SYR4 |
| Chloroform | 45.7 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Trichloroacetic Acid | 37.5 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 23.1 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019
Highest in the city: 23.2 µg/L — ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 18 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 5.82 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5 pCi/L 33% of the EPA limit 15 pCi/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2014 | 1/2 | SYR4 |
| Monochloroacetic Acid | 3.625 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Combined Uranium | 2.682 µg/L 8.9% of the EPA limit 30 µg/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2014 | 1/2 | SYR4 |
| Selenium | 1.8 µg/L 3.6% of the EPA limit 50 µg/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2019 | 1/2 | SYR4 |
| Monobromoacetic Acid | 1.72 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Dibromoacetic Acid | 1.575 µg/L No EPA limit set Main supplier: POPLAR, CITY OF · 3,025 people · 2019 | 2/2 | SYR4 |
| Combined Radium (-226 And -228) | 1.475 pCi/L 30% of the EPA limit 5 pCi/L Highest in the city: ASSINIBOINE & SIOUX RURAL WATER SYSTEM · 1,726 people · 2014 | 1/2 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: POPLAR, CITY OF · 3,025 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 Poplar
| Supplier | Population served |
|---|---|
| POPLAR, CITY OF | 3,025 |
| ASSINIBOINE & SIOUX RURAL WATER SYSTEM | 1,726 |
Frequently asked questions about Poplar tap water
Is Poplar tap water safe to drink?
EPA testing detected 20 contaminants in the water serving Poplar. 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 Poplar?
2 public water suppliers report drinking-water monitoring for Poplar, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Poplar's water?
The contaminants EPA monitoring detected in Poplar include Copper, Fluoride, Nitrate-Nitrite, Nitrate, 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.