What was found in Harlowton'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 |
|---|---|---|---|
| Fluoride | 2095 µg/L 52% of the EPA limit 4000 µg/L Highest in the city: SPRINGWATER COLONY · 100 people · 2017 | 2/4 | SYR4 |
| Nitrate-Nitrite | 800 µg/L 8% of the EPA limit 10000 µg/L Highest in the city: DUNCAN RANCH COLONY · 96 people · 2019 | 3/4 | SYR4 |
| Copper | 666.1 µg/L 51% of the EPA limit 1300 µg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2017 | 3/4 | SYR4 |
| TTHM | 26 µg/L 33% of the EPA limit 80 µg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Dibromochloromethane | 9.1 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Bromodichloromethane | 8.4 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Total Haloacetic Acids (HAA5) | 7.8 µg/L 13% of the EPA limit 60 µg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Chloroform | 5.6 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Gross Alpha, Excl. Radon And U | 5.3 pCi/L 35% of the EPA limit 15 pCi/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2018 | 1/4 | SYR4 |
| Lead | 4.2 µg/L 28% of the EPA limit 15 µg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2017 | 2/4 | SYR4 |
| Bromoform | 3.31 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Dichloroacetic Acid | 3.25 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Combined Radium (-226 And -228) | 3.2 pCi/L 64% of the EPA limit 5 pCi/L Highest in the city: DUNCAN RANCH COLONY · 96 people · 2016 | 1/4 | SYR4 |
| Dibromoacetic Acid | 2.85 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Trichloroacetic Acid | 2.45 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Selenium | 1 µg/L 2% of the EPA limit 50 µg/L Highest in the city: DUNCAN RANCH COLONY · 96 people · 2019 | 1/4 | SYR4 |
| Monobromoacetic Acid | 0.5300 µg/L No EPA limit set Highest in the city: HARLOWTON CITY OF · 1,050 people · 2019 | 1/4 | SYR4 |
| Combined Uranium | 0.4000 µg/L 1.3% of the EPA limit 30 µg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2018 | 1/4 | SYR4 |
| Lead | 0.0020 mg/L 13% of the EPA limit 0.0150 mg/L Highest in the city: HARLOWTON CITY OF · 1,050 people · 2025 | 3/4 | LCR |
Water suppliers serving Harlowton
| Supplier | Population served |
|---|---|
| CMRWA MUSSELSHELL JUDITH RURAL WATER SYS | 1,100 |
| HARLOWTON CITY OF | 1,050 |
| SPRINGWATER COLONY | 100 |
| DUNCAN RANCH COLONY | 96 |
Frequently asked questions about Harlowton tap water
Is Harlowton tap water safe to drink?
EPA testing detected 19 contaminants in the water serving Harlowton. 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 Harlowton?
4 public water suppliers report drinking-water monitoring for Harlowton, Montana to the EPA. Each is listed above with its population served.
What contaminants are in Harlowton's water?
The contaminants EPA monitoring detected in Harlowton include Fluoride, Nitrate-Nitrite, Copper, TTHM, Dibromochloromethane. 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.