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 |
|---|---|---|---|
| TT | Health-based | Resolved | 2019-01-03 |
| TT | Health-based | Resolved | 2019-01-03 |
| TT | Health-based | Resolved | 2004-01-01 |
| TT | Health-based | Resolved | 2004-01-01 |
| MR | Monitoring | Resolved | 2005-10-01 |
| MR | Monitoring | Resolved | 2005-10-01 |
| MR | Monitoring | Resolved | 2005-10-01 |
| MR | Monitoring | Resolved | 2005-10-01 |
| Other | Monitoring | Archived | 2000-02-13 → 2000-03-12 |
| MR | Monitoring | Resolved | 1999-01-01 → 1999-12-31 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Copper | 453.5 µg/L 35% of the EPA limit 1300 µg/L
worst single sample: 520 µg/L | 20/20 | SYR4 | 2014–2017 |
| Lead | 4.175 µg/L 28% of the EPA limit 15 µg/L
worst single sample: 5.6 µg/L | 20/20 | SYR4 | 2014–2017 |
| Lead | 0.0030 mg/L 20% of the EPA limit 0.0150 mg/L | 13/13 | LCR | 2023 |
| TTHM | 25.855 µg/L 32% of the EPA limit 80 µg/L
worst single sample: 26.1 µg/L | 8/8 | SYR4 | 2013–2019 |
| Total Haloacetic Acids (HAA5) | 7.969 µg/L 13% of the EPA limit 60 µg/L
worst single sample: 8.76 µg/L | 8/8 | SYR4 | 2013–2019 |
| Nitrate | 2800 µg/L 28% of the EPA limit 10000 µg/L | 6/6 | SYR4 | 2017–2019 |
| Antimony, Total | 0.2500 µg/L 4.2% of the EPA limit 6 µg/L | 1/1 | SYR4 | 2017 |
| Barium | 133 µg/L 6.7% of the EPA limit 2000 µg/L | 1/1 | SYR4 | 2017 |
| Fluoride | 700 µg/L 18% of the EPA limit 4000 µg/L | 1/1 | SYR4 | 2017 |
| Gross Alpha, Excl. Radon And U | 5 pCi/L 33% of the EPA limit 15 pCi/L | 1/1 | SYR4 | 2014 |
| Selenium | 3.6 µg/L 7.2% of the EPA limit 50 µg/L | 1/1 | SYR4 | 2017 |
10 contaminants tested, none detected
Utility contact
Frequently asked questions about Gregory
Is Gregory tap water safe to drink?
EPA monitoring detected 11 contaminants in Gregory'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 Gregory's water?
EPA monitoring detected Copper, Lead, Lead, TTHM, Total Haloacetic Acids (HAA5), and others. The full list with the level and data source for each is above.
How many people does Gregory serve?
Gregory reports serving 1,221 people in South Dakota, per its EPA record.
Has Gregory had any water quality violations?
The EPA has 69 violations on file for Gregory, of which 4 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.