What was found in ZIP 59105
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 |
|---|---|---|---|
| Nitrate-Nitrite | 593 µg/L 5.9% of the EPA limit 10000 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Fluoride | 550 µg/L 14% of the EPA limit 4000 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Nitrate | 390 µg/L 3.9% of the EPA limit 10000 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Copper | 282.1 µg/L 22% of the EPA limit 1300 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2017 | 2/2 | SYR4 |
| TTHM | 70.8 µg/L 89% of the EPA limit 80 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 60.94 µg/L 102% of the EPA limit, at the 95th percentile of samples — 60 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Barium | 59.5 µg/L 3% of the EPA limit 2000 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Chloroform | 58 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Lithium | 57 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2023 | 2/2 | UCMR-5 |
| Trichloroacetic Acid | 35.85 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 23.925 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Bromodichloromethane | 12 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019
Highest in the ZIP: 13 µg/L — BILLINGS HEIGHTS CO WATER DIST OF · 12,000 people · 2019 | 2/2 | SYR4 |
| Lead | 10.4 µg/L 69% of the EPA limit 15 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2017 | 2/2 | SYR4 |
| Arsenic | 7 µg/L 70% of the EPA limit 10 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Monochloroacetic Acid | 2.5 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019
Highest in the ZIP: 5.48 µg/L — BILLINGS HEIGHTS CO WATER DIST OF · 12,000 people · 2019 | 2/2 | SYR4 |
| Dibromochloromethane | 3.2 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019
Highest in the ZIP: 4.37 µg/L — BILLINGS HEIGHTS CO WATER DIST OF · 12,000 people · 2019 | 2/2 | SYR4 |
| Monobromoacetic Acid | 1.125 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 0.7970 µg/L No EPA limit set Main supplier: BILLINGS CITY OF · 114,000 people · 2019 | 2/2 | SYR4 |
| Lead | 0.0050 mg/L 33% of the EPA limit 0.0150 mg/L Main supplier: BILLINGS CITY OF · 114,000 people · 2023 | 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.
Water suppliers serving ZIP 59105
| Supplier | State | Population served |
|---|---|---|
| BILLINGS CITY OF | MT | 114,000 |
| BILLINGS HEIGHTS CO WATER DIST OF | MT | 12,000 |
Frequently asked questions about ZIP 59105 tap water
Is the tap water in ZIP 59105 safe to drink?
EPA testing detected 20 contaminants across the water suppliers serving ZIP 59105. 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 59105?
2 public water suppliers report EPA drinking-water monitoring for ZIP 59105. Each is listed above with its population served.
What contaminants are in ZIP 59105's water?
EPA monitoring detected Nitrate-Nitrite, Fluoride, Nitrate, Copper, TTHM, and others across this ZIP's suppliers. The full list with levels and sources is above.