WASHINGTON CO RWD #7
PWSID: OK3007415 · Dewey, OK · Serves 258 people
WASHINGTON CO RWD #7 has 20 health-based violations out of 20 total. Health violations indicate contaminant levels exceeded EPA limits or required treatment was not followed.
WASHINGTON CO RWD #7 (PWSID OK3007415) is a cws water system drawing from a surface water source, regulated by the EPA Safe Drinking Water Information System (SDWIS) under the Safe Drinking Water Act. It serves approximately 258 people in Dewey, OK, and is subject to primacy enforcement by the Oklahoma drinking-water program.
The system's federal compliance record contains 20 total violations, with 20 classified as health-based (MCL exceedances or treatment-technique failures). 4 distinct contaminants have been cited, including Total Trihalomethanes (TTHM), Haloacetic Acids (HAA5), Combined Radium 226/228. Recorded violations span 2014–2025.
A historical violation does not necessarily describe current water quality, systems must notify customers and remediate, and monitoring-type violations often reflect reporting lapses rather than contamination. The most authoritative real-time 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)
- OK3007415
- System Type
- CWS
- Water Source
- Surface Water
- Location
- Dewey, OK
- Population Served
- 258
- Health Violations
- Yes (20)
What contaminants are in this water system?
| Contaminant | Violations | Health-Based |
|---|---|---|
| Total Trihalomethanes (TTHM) | 15 | 15 |
| Haloacetic Acids (HAA5) | 2 | 2 |
| Combined Radium 226/228 | 2 | 2 |
| Gross Alpha | 1 | 1 |
Violation History (20)
| Contaminant | Health | Date |
|---|---|---|
| Haloacetic Acids (HAA5) | Yes | Apr 1, 2025 |
| Haloacetic Acids (HAA5) | Yes | Jan 1, 2025 |
| Gross Alpha | Yes | Oct 17, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2024 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2022 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2022 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2022 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2021 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2021 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2018 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2018 |
| Combined Radium 226/228 | Yes | Jun 10, 2017 |
| Total Trihalomethanes (TTHM) | Yes | Apr 1, 2016 |
| Total Trihalomethanes (TTHM) | Yes | Jan 1, 2016 |
| Combined Radium 226/228 | Yes | Dec 7, 2015 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2015 |
| Total Trihalomethanes (TTHM) | Yes | Oct 1, 2014 |
| Total Trihalomethanes (TTHM) | Yes | Jul 1, 2014 |
Frequently Asked Questions
Is WASHINGTON CO RWD #7 water safe to drink?
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What violations does WASHINGTON CO RWD #7 have?
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About This Data
Water system data is from the EPA Safe Drinking Water Information System (SDWIS). Health-based violations include Maximum Contaminant Level (MCL) and Treatment Technique (TT) violations that may pose a direct risk to public health. Violation records may span multiple years.
Source: U.S. Environmental Protection Agency, SDWIS Federal Reporting Services U.S. Environmental Protection Agency, SDWIS Federal Reporting Services
Read our methodology - how this data is sourced, computed, and verified.