Compliance record
Formal violations the EPA has on file for this supplier. A health-based violation means a contaminant limit or a required treatment was breached; the rest are monitoring or reporting failures — still violations, but not a measured health risk.
| Violation | Type | Status | Period |
|---|---|---|---|
| MCL | Health-based | Archived | 2006-11-01 → 2006-11-30 |
| MCL | Health-based | Archived | 2006-11-01 → 2006-11-30 |
| MCL | Health-based | Archived | 2006-11-01 → 2006-11-30 |
| MR | Monitoring | Resolved | 2022-07-01 → 2022-09-30 |
| MR | Monitoring | Resolved | 2022-07-01 → 2022-09-30 |
| MR | Monitoring | Resolved | 2022-07-01 → 2022-09-30 |
| MR | Monitoring | Resolved | 2022-07-01 → 2022-09-30 |
| MR | Monitoring | Resolved | 2019-11-20 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 640.7 µg/L 49% of the EPA limit 1300 µg/L
worst single sample: 750 µg/L | 30/30 | SYR4 | 2013–2019 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L | 16/16 | LCR | 2025 |
| Nitrate-Nitrite | 878 µg/L 8.8% of the EPA limit 10000 µg/L
worst single sample: 930 µg/L | 9/9 | SYR4 | 2012–2019 |
| Lead | 4 µg/L 27% of the EPA limit 15 µg/L | 8/30 | SYR4 | 2013–2019 |
| Bromodichloromethane | 1.226 µg/L No EPA limit set
worst single sample: 1.28 µg/L | 7/7 | SYR4 | 2014–2019 |
| Chloroform | 1.604 µg/L No EPA limit set
worst single sample: 1.61 µg/L | 7/7 | SYR4 | 2014–2019 |
| TTHM | 3.543 µg/L 4.4% of the EPA limit 80 µg/L
worst single sample: 3.63 µg/L | 7/7 | SYR4 | 2014–2019 |
| Dibromochloromethane | 0.8340 µg/L No EPA limit set
worst single sample: 0.8800 µg/L | 5/7 | SYR4 | 2014–2019 |
| Dichloroacetic Acid | 1.108 µg/L No EPA limit set
worst single sample: 1.11 µg/L | 3/7 | SYR4 | 2014–2019 |
| Total Haloacetic Acids (HAA5) | 1.108 µg/L 1.8% of the EPA limit 60 µg/L
worst single sample: 1.11 µg/L | 3/7 | SYR4 | 2014–2019 |
| Nitrate | 430 µg/L 4.3% of the EPA limit 10000 µg/L | 2/2 | SYR4 | 2014 |
| Arsenic | 2.01 µg/L 20% of the EPA limit 10 µg/L | 1/1 | SYR4 | 2016 |
| Barium | 3.9 µg/L 0.2% of the EPA limit 2000 µg/L | 1/1 | SYR4 | 2017 |
| Combined Radium (-226 And -228) | 1.95 pCi/L 39% of the EPA limit 5 pCi/L | 1/1 | SYR4 | 2017 |
| Combined Uranium | 0.8500 µg/L 2.8% of the EPA limit 30 µg/L | 1/1 | SYR4 | 2017 |
| Fluoride | 753 µg/L 19% of the EPA limit 4000 µg/L | 1/1 | SYR4 | 2017 |
| Gross Alpha, Excl. Radon And U | 1.09 pCi/L 7.3% of the EPA limit 15 pCi/L | 1/1 | SYR4 | 2017 |
50 contaminants tested, none detected
Utility contact
Frequently asked questions about Hillsboro City of
Is Hillsboro City of tap water safe to drink?
EPA monitoring detected 17 contaminants in Hillsboro City of's water. A detection isn't the same as a violation — most levels are within federal limits. See each level and source above, and the utility's annual Consumer Confidence Report for its official compliance status.
What contaminants were detected in Hillsboro City of's water?
EPA monitoring detected Copper, Lead, Nitrate-Nitrite, Lead, Bromodichloromethane, and others. The full list with the level and data source for each is above.
How many people does Hillsboro City of serve?
Hillsboro City of reports serving 1,603 people in North Dakota, per its EPA record.
Has Hillsboro City of had any water quality violations?
The EPA has 8 violations on file for Hillsboro City of, of which 3 are health-based (a contaminant limit or required treatment was breached) and 0 remain open. The rest are monitoring or reporting failures.
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.