Hopi High School - BIA EPA Drinking Water Compliance Record
TapScore summarizes EPA Safe Drinking Water Information System records for public water system 090400395. It does not test household tap water or determine whether water is currently safe to drink.
Frequent health-based records
TapScore compliance-history grade
74 EPA violation records from July 1, 2021 through June 30, 2026
8 classified as health-based
System details
- PWSID
- 090400395
- Population served
- 1,005
- Water source
- Ground Water
- Owner type
- Federal
- State
- Connecticut
- EPA region
- 9
- All historical records
- 238
- Not marked resolved
- 49
How to read this grade
Grade F means “Frequent health-based records” under TapScore's published method. It is a comparison of recent EPA compliance records, not an EPA grade, laboratory result, health recommendation, or guarantee of present water quality.
EPA contaminant categories in violation records
| EPA category | Classification | Records |
|---|---|---|
| Coliform (TCR) | Health-based record | 52 |
| Arsenic | Health-based record | 38 |
| Fluoride | Health-based record | 25 |
| Public Notice | Monitoring/reporting record | 15 |
| Nitrate | Monitoring/reporting record | 10 |
| Chlorine | Monitoring/reporting record | 9 |
| Total Coliform | Monitoring/reporting record | 9 |
| Revised Total Coliform Rule | Monitoring/reporting record | 9 |
| Lead and Copper Rule | Monitoring/reporting record | 8 |
| Haloacetic Acids (HAA5) | Monitoring/reporting record | 7 |
| Total Trihalomethanes (TTHMs) | Monitoring/reporting record | 7 |
| Uranium | Health-based record | 5 |
| Barium | Monitoring/reporting record | 2 |
| Beryllium, Total | Monitoring/reporting record | 2 |
| Groundwater Rule | Health-based record | 2 |
| Consumer Confidence Rule | Monitoring/reporting record | 2 |
| Chromium | Monitoring/reporting record | 2 |
| Cadmium | Monitoring/reporting record | 2 |
| LEAD AND COPPER RULE REVISIONS | Health-based record | 2 |
| 1,2,4-Trichlorobenzene | Monitoring/reporting record | 1 |
Showing the 20 categories with the most records out of 48 categories in this system's history.
These are compliance records associated with an EPA contaminant code, not current tap-water test results or proof that a substance is presently detected.
Violation history by year
Historical counts may include resolved records. For current notices and local sampling results, check the utility's latest Consumer Confidence Report and your state drinking-water agency.