TWISP TOWN OF EPA Drinking Water Compliance Record
TapScore summarizes EPA Safe Drinking Water Information System records for public water system WA5390050. It does not test household tap water or determine whether water is currently safe to drink.
Few non-health records
TapScore compliance-history grade
2 EPA violation records from July 1, 2021 through June 30, 2026
System details
- PWSID
- WA5390050
- Population served
- 1,173
- Water source
- Ground Water
- Owner type
- Local Government
- State
- Washington
- EPA region
- 10
- All historical records
- 41
- Not marked resolved
- 19
How to read this grade
Grade B means “Few non-health 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 | 9 |
| Nitrate | Monitoring/reporting record | 7 |
| Endrin | Monitoring/reporting record | 1 |
| BHC-GAMMA | Monitoring/reporting record | 1 |
| Simazine | Monitoring/reporting record | 1 |
| Di(2-ethylhexyl) phthalate | Monitoring/reporting record | 1 |
| Hexachlorocyclopentadiene | Monitoring/reporting record | 1 |
| Atrazine | Monitoring/reporting record | 1 |
| Gross Alpha | Monitoring/reporting record | 1 |
| Selenium | Monitoring/reporting record | 1 |
| Chromium | Monitoring/reporting record | 1 |
| Fluoride | Monitoring/reporting record | 1 |
| Pentachlorophenol | Monitoring/reporting record | 1 |
| Arsenic | Monitoring/reporting record | 1 |
| Heptachlor | Monitoring/reporting record | 1 |
| Benzo(a)pyrene | Monitoring/reporting record | 1 |
| Thallium | Monitoring/reporting record | 1 |
| Toxaphene | Monitoring/reporting record | 1 |
| Barium | Monitoring/reporting record | 1 |
| Heptachlor epoxide | Monitoring/reporting record | 1 |
Showing the 20 categories with the most records out of 27 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.
Reported service area
Cities served
ZIP codes served
County: Okanogan