What was found in ZIP 59911
The level at this ZIP's main supplier, the highest level anywhere in it, the EPA limit for each, and where the figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Barium | 320 µg/L 16% of the EPA limit 2000 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2012 | 1/1 | SYR4 |
| Nitrate-Nitrite | 220 µg/L 2.2% of the EPA limit 10000 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2019 | 1/1 | SYR4 |
| Nitrate | 170 µg/L 1.7% of the EPA limit 10000 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2012 | 1/1 | SYR4 |
| Copper | 100.2 µg/L 7.7% of the EPA limit 1300 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2017 | 1/1 | SYR4 |
| Fluoride | 70 µg/L 1.8% of the EPA limit 4000 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2012 | 1/1 | SYR4 |
| Lithium | 12.1 µg/L No EPA limit set Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2025 | 1/1 | UCMR-5 |
| Lead | 8.3 µg/L 55% of the EPA limit 15 µg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2017 | 1/1 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: BIGFORK COUNTY WATER AND SEWER · 6,100 people · 2023 | 1/1 | 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.
Water suppliers serving ZIP 59911
| Supplier | State | Population served |
|---|---|---|
| BIGFORK COUNTY WATER AND SEWER | MT | 6,100 |
Frequently asked questions about ZIP 59911 tap water
Is the tap water in ZIP 59911 safe to drink?
EPA testing detected 8 contaminants across the water suppliers serving ZIP 59911. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and your utility's annual Consumer Confidence Report for the official status.
Which water suppliers serve ZIP 59911?
1 public water supplier report EPA drinking-water monitoring for ZIP 59911. Each is listed above with its population served.
What contaminants are in ZIP 59911's water?
EPA monitoring detected Barium, Nitrate-Nitrite, Nitrate, Copper, Fluoride, and others across this ZIP's suppliers. The full list with levels and sources is above.