Public water system record
Mayes Co RWD # 3
Serves an area of Mayes County and Delaware County, OK that includes Disney · 2,400 people served
Federal records show 2 health-based violations and 27 monitoring/reporting issues for Mayes Co RWD # 3 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
- 2
- Resolved
- 1
- Unresolved
- 0
- Archived by EPA
- 1
- Any acute record
- No
- Monitoring issues, last 10 years
- 27
Key facts
- Mayes Co RWD # 3 draws water from 1 surface water intake.
- 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, November 2025.
- Record on file since 2003, with 20 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 664 unknown out of 1,386 service lines.
Check whether Mayes Co RWD # 3 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 |
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 | Resolved | 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 REVISIONS
RPT
|
Oct 17, 2024 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Oct 1, 2024 | Resolved |
|
Atrazine
Monitoring and reporting
|
Apr 1, 2024 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Sep 1, 2021 | Resolved |
|
Haloacetic Acids (HAA5)
Monitoring and reporting
|
Sep 29, 2019 | Resolved |
|
Total Trihalomethanes (TTHMs)
Monitoring and reporting
|
Sep 29, 2019 | Resolved |
|
Styrene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Ethylbenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Toluene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Benzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
CHLOROBENZENE
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Tetrachloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1,2-Trichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Trichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2-Dichloropropane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Carbon tetrachloride
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1,1-Trichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2-Dichloroethane
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
trans-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,1-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Vinyl chloride
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
p-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
o-Dichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
DICHLOROMETHANE
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
Xylenes, Total
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
cis-1,2-Dichloroethylene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
|
1,2,4-Trichlorobenzene
Monitoring and reporting
|
Jan 1, 2014 | Resolved |
Full record since 2003
EPA's records for Mayes Co RWD # 3 go back to 2003. Before October 19, 2016 they list 20 health-based violations (20 resolved) and 24 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 2000s | 2 | 3 |
| 2010 to October 18, 2016 | 18 | 21 |
| October 19, 2016 to 2019 | 0 | 2 |
| 2020s | 2 | 4 |
Most recent health-based violation before October 19, 2016: CARBON, TOTAL, began July 2016, Resolved.
Show all 20 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2016 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2016 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2016 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jul 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Apr 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jan 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.112 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jan 1, 2015 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Oct 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Oct 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.112 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jul 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Jan 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.069 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Oct 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.068 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Apr 1, 2012 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Jan 1, 2010 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.064 mg/L, federal limit 0.06 mg/L (1.1 times the limit)
|
Jul 1, 2008 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2003 | Resolved |
Enforcement actions
Oklahoma regulators took 16 formal enforcement actions against Mayes Co RWD # 3 between 2003 and 2025. The most recent was a compliance order (no penalty) in November 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Nov 18, 2025 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Feb 14, 2017 | Oklahoma | Compliance order with a penalty | 3 violations (3 health-based): CARBON, TOTAL |
| Mar 14, 2016 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): CARBON, TOTAL, Total Trihalomethanes (TTHMs) |
| Dec 8, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Sep 11, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Jun 12, 2015 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| Mar 16, 2015 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Total Trihalomethanes (TTHMs), Haloacetic Acids (HAA5) |
| Nov 14, 2014 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs) |
| May 28, 2013 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Jan 15, 2013 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Dec 6, 2012 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Aug 21, 2012 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Mar 1, 2010 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| May 18, 2009 | Oklahoma | Compliance order with a penalty | 1 violation: Nitrate-Nitrite |
| Feb 12, 2009 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Sep 11, 2003 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Surface Water Treatment Rule |
What the violations mean
Haloacetic Acids (HAA5)
1 incidentHaloacetic acid byproducts exceeded the federal limit
Long-term exposure to HAAs may increase cancer risk
LEAD AND COPPER RULE REVISIONS
1 incidentThe system did not complete a treatment step or action that the LEAD AND COPPER RULE REVISIONS requires (a treatment technique violation).
The utility had to notify customers about this violation.
Where the water comes from
Mayes Co RWD # 3 draws water from 1 surface water intake. 1 other public water system has an emergency connection to Mayes Co RWD # 3.
Annual water quality report
Mayes Co RWD # 3 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