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 | 1985-01-29 → 1985-02-28 |
| MCL | Health-based | Archived | 1985-01-29 → 1985-02-28 |
| MCL | Health-based | Archived | 1985-01-10 → 1985-02-09 |
| MCL | Health-based | Archived | 1985-01-10 → 1985-02-09 |
| MCL | Health-based | Archived | 1985-01-07 → 1985-02-06 |
| MCL | Health-based | Archived | 1985-01-07 → 1985-02-06 |
| Other | Monitoring | Archived | 1981-06-10 → 1981-07-09 |
| Other | Monitoring | Archived | 1981-05-10 → 1981-06-09 |
| Other | Monitoring | Archived | 1981-03-14 → 1981-04-13 |
| Other | Monitoring | Archived | 1981-02-10 → 1981-03-09 |
PFAS detected
| Contaminant | Max | Detection rate | Period |
|---|---|---|---|
| PFHXS | 0.0800 µg/L | 77/115 | 2024 |
| Pfpea | 0.0475 µg/L | 63/115 | 2024 |
| Pfhxa | 0.0371 µg/L | 56/115 | 2024 |
| PFBS | 0.0349 µg/L | 41/115 | 2024 |
| PFOS | 0.1350 µg/L | 37/115 | 2024 |
| Pfhpa | 0.0185 µg/L | 22/115 | 2024 |
| PFOA | 0.0183 µg/L | 9/115 | 2024 |
| Pfba | 0.0181 µg/L | 8/115 | 2024 |
| 6:2 Fts | 0.1482 µg/L | 5/115 | 2024 |
| Pfpes | 0.0099 µg/L | 4/115 | 2024 |
| 8:2 Fts | 0.0075 µg/L | 1/115 | 2024 |
Other contaminants detected
| Contaminant | Level vs EPA limit | Detection rate | Source | Period |
|---|---|---|---|---|
| Lead | 0.0137 mg/L 91% of the EPA limit 0.0150 mg/L | 9/9 | LCR | 2025 |
19 contaminants tested, none detected
Utility contact
Frequently asked questions about Gwa Northern Water
Is Gwa Northern Water tap water safe to drink?
EPA monitoring detected 12 contaminants in Gwa Northern Water'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 Gwa Northern Water's water?
EPA monitoring detected PFHXS, Pfpea, Pfhxa, PFBS, PFOS, and others. The full list with the level and data source for each is above.
How many people does Gwa Northern Water serve?
Gwa Northern Water reports serving 139,207 people in GU, per its EPA record.
Has Gwa Northern Water had any water quality violations?
The EPA has 18 violations on file for Gwa Northern Water, of which 6 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.