POTEAU VALLEY IMPROVEMENT AUTHORITY
PWSID: OK1020104 · Wister, OK · Serves 10 people
According to EPA Safe Drinking Water Information System (SDWIS), POTEAU VALLEY IMPROVEMENT AUTHORITY (PWSID OK1020104) in Wister, OK is listed as a CWS water system covering about 10 people. The same extract lists 21 health-based violation records spanning 1984-2025. Those 21 health-based rows for POTEAU VALLEY IMPROVEMENT AUTHORITY cover contaminants such as TTHM, Total Haloacetic Acids (HAA5), Interim Enhanced Surface Water Treatment Rule; they remain historical EPA registry entries, not a current compliance or drinkability score.
POTEAU VALLEY IMPROVEMENT AUTHORITY has 21 health-based violation records in this historical extract. Monitoring and reporting records are not included.
PlainEnviro's health-based SDWIS extract covers monitoring and reporting violations only -- it does not include unresolved enforcement actions in progress or corrective steps a utility has taken since the extract date. 7 distinct EPA contaminant codes appear in this system's record, including TTHM, Total Haloacetic Acids (HAA5), Interim Enhanced Surface Water Treatment Rule. Recorded violations span 1984–2025. Day-to-day primacy enforcement for this system runs through the Oklahoma drinking-water program, not EPA directly.
A historical health-based record does not necessarily describe current water quality or compliance. The most authoritative current source is the utility's annual Consumer Confidence Report. For enforcement history and corrective-action orders, consult EPA ECHO and the Oklahoma state drinking-water program's public portal.
System Details
- EPA ID (PWSID)
- OK1020104
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Wister, OK
- Population Served
- 10
- Health Violations
- Yes (21)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| TTHM | 9 | 9 |
| Total Haloacetic Acids (HAA5) | 5 | 5 |
| Interim Enhanced Surface Water Treatment Rule | 2 | 2 |
| Coliform (Pre-TCR) | 2 | 2 |
| LEAD AND COPPER RULE REVISIONS | 1 | 1 |
| Surface Water Treatment Rule | 1 | 1 |
| Coliform (TCR) | 1 | 1 |
Violation History (21)
| Contaminant | Health | Date |
|---|---|---|
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2025 |
| Total Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Yes | Feb 1, 2025 |
| Interim Enhanced Surface Water Treatment Rule | Yes | Feb 1, 2025 |
| LEAD AND COPPER RULE REVISIONS | Yes | Oct 17, 2024 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Jan 1, 2023 |
| TTHM | Yes | Oct 1, 2022 |
| TTHM | Yes | Oct 1, 2022 |
| TTHM | Yes | Oct 1, 2022 |
| TTHM | Yes | Oct 1, 2022 |
| Total Haloacetic Acids (HAA5) | Yes | Jul 1, 2019 |
| Surface Water Treatment Rule | Yes | Aug 1, 2018 |
| TTHM | Yes | Jul 1, 2013 |
| Coliform (TCR) | Yes | Jul 1, 1993 |
| Coliform (Pre-TCR) | Yes | May 1, 1990 |
| Coliform (Pre-TCR) | Yes | Nov 1, 1988 |
| TTHM | Yes | Dec 1, 1984 |
Frequently Asked Questions
What does EPA SDWIS list for POTEAU VALLEY IMPROVEMENT AUTHORITY?
How many people does POTEAU VALLEY IMPROVEMENT AUTHORITY serve?
What violations does POTEAU VALLEY IMPROVEMENT AUTHORITY have?
What contaminants have been found in POTEAU VALLEY IMPROVEMENT AUTHORITY water?
Compare beyond Oklahoma
Nationwide peers by violations & population served
Cross-state SDWIS systems nearest POTEAU VALLEY IMPROVEMENT AUTHORITY on cumulative violation count (21) and EPA-reported population served (10). Violation-count peers include Dishchii Bikoh Community School - BIA Charter, NEW STUYAHOK WATER SYSTEM, MOUNTAIN VILLAGE WATER SYSTEM.
Similar violation count
Nearest cross-state community systems (500+ served) by SDWIS violations on record.
Nearby Water Systems
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About This Data
POTEAU VALLEY IMPROVEMENT AUTHORITY (OK1020104) is drawn from EPA SDWIS. Nearby county systems in this extract include LEFLORE CO. RWD #14; POTEAU PWA; LEFLORE CO. RWD #2; LEFLORE CO. RWD #18. Health-based rows (21 MCL/TT) are historical registry state, not a current drinkability score.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.