Public water system record
Mayes Co RWD # 5
Serves an area of Mayes County and Rogers County, OK that includes Chelsea and Sportsmen Acres · 3,360 people served
Federal records show 1 health-based violation and 1 monitoring/reporting issue for Mayes Co RWD # 5 in the last ten years. The most serious issue in this window was a Haloacetic Acids (HAA5) violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 1
- Resolved
- 0
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 1
Key facts
- Mayes Co RWD # 5 buys its water from Okla Ordnance Works Authority and Chelsea Economic Dev. Auth.
- Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit), 2025.
- Most recent formal enforcement: compliance order (no penalty) by Oklahoma, October 2025.
- Record on file since 1991, with 1 health-based violation before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,381 unknown out of 1,749 service lines.
Check whether Mayes Co RWD # 5 serves your address
Health-based violations
Since October 2016Violation data reflects EPA records through March 2026. For the most current status, visit the EPA ECHO database.
| Contaminant | Rule family | Start date | Status | Acute |
|---|---|---|---|---|
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
220 | Jul 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2017 | Resolved |
Full record since 1991
EPA's records for Mayes Co RWD # 5 go back to 1991. Before October 19, 2016 they list 1 health-based violation (1 resolved) and 1 monitoring or reporting violation.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 1 | 1 |
| October 19, 2016 to 2019 | 0 | 1 |
| 2020s | 1 | 0 |
Most recent health-based violation before October 19, 2016: Total Coliform (acute), began September 1992, Resolved.
Show the health-based violation before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 1992 | Resolved |
Enforcement actions
Oklahoma regulators took 2 formal enforcement actions against Mayes Co RWD # 5 and issued 1 boil water order between 1992 and 2025. The most recent was a compliance order (no penalty) in October 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Oct 2, 2025 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Sep 18, 1992 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Total Coliform |
| Sep 18, 1992 | Oklahoma | Boil water order | 1 violation (1 health-based): Total Coliform |
What the violations mean
Haloacetic Acids (HAA5)
1 incidentHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
Where the water comes from
Mayes Co RWD # 5 buys its water from Okla Ordnance Works Authority and Chelsea Economic Dev. Auth. It lists no wells or intakes of its own.
Buys water from
- Okla Ordnance Works Authority Pryor, OK
- Chelsea Economic Dev. Auth. Chelsea, OK
Annual water quality report
Mayes Co RWD # 5 must give its customers an annual water quality report (Consumer Confidence Report) by July 1, with the levels its tests found in the previous year.
Where the state allows it, systems serving fewer than 10,000 people may publish the report in a local newspaper or news site instead of mailing it, and must provide a copy on request.
Find a posted report with EPA's Consumer Confidence Report search
Testing your own water
To test the water at your tap, or a private well this record does not cover, use a laboratory certified for drinking water by Oklahoma.
Certified drinking water labs by state EPA guidance for private wells