What was found in ZIP 59840
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 | 2936 µg/L 29% of the EPA limit 10000 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 2/2 | SYR4 |
| Copper | 1135 µg/L 87% of the EPA limit 1300 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017 | 2/2 | SYR4 |
| Nitrate | 1000 µg/L 10% of the EPA limit 10000 µg/L Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/2 | SYR4 |
| Fluoride | 200 µg/L 5% of the EPA limit 4000 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2013 | 1/2 | SYR4 |
| Lead | 22.1 µg/L 147% of the EPA limit, at the 95th percentile of samples — 15 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017
Highest in the ZIP: 117.19 µg/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Barium | 50 µg/L 2.5% of the EPA limit 2000 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2013 | 1/2 | SYR4 |
| TTHM | 23.565 µg/L 29% of the EPA limit 80 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 2/2 | SYR4 |
| Chloroform | 19.61 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Bromoform | 16.875 µg/L No EPA limit set Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/2 | SYR4 |
| Gross Beta Particle Activity | 5.74 pCi/L No EPA limit set Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/2 | SYR4 |
| Total Haloacetic Acids (HAA5) | 5.6 µg/L 9.3% of the EPA limit 60 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Combined Radium (-226 And -228) | 4.56 pCi/L 91% of the EPA limit 5 pCi/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017 | 1/2 | SYR4 |
| Gross Alpha, Excl. Radon And U | 4.05 pCi/L 27% of the EPA limit 15 pCi/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017
Highest in the ZIP: 4.4 pCi/L — KOHALA RANCH WATER CO. · 850 people · 2019 | 2/2 | SYR4 |
| Dichloroacetic Acid | 3.69 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Bromodichloromethane | 2.92 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Combined Uranium | 2.85 µg/L 9.5% of the EPA limit 30 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017 | 1/2 | SYR4 |
| Trichloroacetic Acid | 2.39 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Chromium | 2.1495 µg/L 2.1% of the EPA limit 100 µg/L Highest in the ZIP: KOHALA RANCH WATER CO. · 850 people · 2019 | 1/2 | SYR4 |
| Arsenic | 2 µg/L 20% of the EPA limit 10 µg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2017 | 1/2 | SYR4 |
| Dibromochloromethane | 1.216 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Dibromoacetic Acid | 0.5700 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2019 | 1/2 | SYR4 |
| Lead | 0.0010 mg/L 6.7% of the EPA limit 0.0150 mg/L Main supplier: HAMILTON CITY OF · 5,660 people · 2023
Highest in the ZIP: 0.0107 mg/L — KOHALA RANCH WATER CO. · 850 people · 2021 | 2/2 | LCR |
| PFBS | 0.0031 µg/L No EPA limit set Main supplier: HAMILTON CITY OF · 5,660 people · 2024 | 1/2 | UCMR-5 |
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 59840
| Supplier | State | Population served |
|---|---|---|
| HAMILTON CITY OF | MT | 5,660 |
| KOHALA RANCH WATER CO. | HI | 850 |
Frequently asked questions about ZIP 59840 tap water
Is the tap water in ZIP 59840 safe to drink?
EPA testing detected 23 contaminants across the water suppliers serving ZIP 59840. 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 59840?
2 public water suppliers report EPA drinking-water monitoring for ZIP 59840. Each is listed above with its population served.
What contaminants are in ZIP 59840's water?
EPA monitoring detected Nitrate-Nitrite, Copper, Nitrate, Fluoride, Lead, and others across this ZIP's suppliers. The full list with levels and sources is above.