What was found in ZIP 59457
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 |
|---|---|---|---|
| Fluoride | 595 µg/L 15% of the EPA limit 4000 µg/L Main supplier: LEWISTOWN CITY OF · 5,923 people · 2017 | 1/1 | SYR4 |
| Nitrate-Nitrite | 190 µg/L 1.9% of the EPA limit 10000 µg/L Main supplier: LEWISTOWN CITY OF · 5,923 people · 2019 | 1/1 | SYR4 |
| Copper | 91.6 µg/L 7% of the EPA limit 1300 µg/L Main supplier: LEWISTOWN CITY OF · 5,923 people · 2019 | 1/1 | SYR4 |
| Lead | 1.9 µg/L 13% of the EPA limit 15 µg/L Main supplier: LEWISTOWN CITY OF · 5,923 people · 2019 | 1/1 | SYR4 |
| Lead | 0.0 mg/L 0% of the EPA limit 0.0150 mg/L Main supplier: LEWISTOWN CITY OF · 5,923 people · 2025 | 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 59457
| Supplier | State | Population served |
|---|---|---|
| LEWISTOWN CITY OF | MT | 5,923 |
Frequently asked questions about ZIP 59457 tap water
Is the tap water in ZIP 59457 safe to drink?
EPA testing detected 5 contaminants across the water suppliers serving ZIP 59457. 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 59457?
1 public water supplier report EPA drinking-water monitoring for ZIP 59457. Each is listed above with its population served.
What contaminants are in ZIP 59457's water?
EPA monitoring detected Fluoride, Nitrate-Nitrite, Copper, Lead, Lead across this ZIP's suppliers. The full list with levels and sources is above.