Grand Canyon West EPA Drinking Water Compliance Record
TapScore summarizes EPA Safe Drinking Water Information System records for public water system 090400101. It does not test household tap water or determine whether water is currently safe to drink.
Some recent records
TapScore compliance-history grade
3 EPA violation records from July 1, 2021 through June 30, 2026
1 classified as health-based
System details
- PWSID
- 090400101
- Population served
- 3,120
- Water source
- Ground Water
- Owner type
- Native American
- State
- Connecticut
- EPA region
- 9
- All historical records
- 133
- Not marked resolved
- 0
How to read this grade
Grade C means “Some recent 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 | 21 |
| Lead and Copper Rule | Health-based record | 10 |
| Gross Alpha | Monitoring/reporting record | 9 |
| Uranium | Monitoring/reporting record | 9 |
| Radium-226 | Monitoring/reporting record | 9 |
| Nitrate | Monitoring/reporting record | 8 |
| Consumer Confidence Rule | Monitoring/reporting record | 7 |
| Haloacetic Acids (HAA5) | Monitoring/reporting record | 5 |
| Total Trihalomethanes (TTHMs) | Monitoring/reporting record | 5 |
| Total Coliform | Monitoring/reporting record | 5 |
| Public Notice | Monitoring/reporting record | 2 |
| Arsenic | Monitoring/reporting record | 1 |
| Selenium | Monitoring/reporting record | 1 |
| Cyanide | Monitoring/reporting record | 1 |
| Fluoride | Monitoring/reporting record | 1 |
| Thallium | Monitoring/reporting record | 1 |
| Beryllium | Monitoring/reporting record | 1 |
| Beryllium, Total | Monitoring/reporting record | 1 |
| Thallium, Total | Monitoring/reporting record | 1 |
| BHC-GAMMA | Monitoring/reporting record | 1 |
Showing the 20 categories with the most records out of 53 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.