Public water system record
Tishomingo Municipal Authority
Serves Tishomingo, Johnston County, OK · 3,000 people served
Federal records show 14 health-based violations and 8 monitoring/reporting issues for Tishomingo Municipal Authority in the last ten years. The most serious issue in this window was a Long Term 2 Enhanced Surface Water Treatment Rule violation that EPA lists as archived, not resolved.
System profile
- Health-based violations, last 10 years
- 14
- Resolved
- 9
- Unresolved
- 0
- Archived by EPA
- 5
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 8
Key facts
- Tishomingo Municipal Authority draws water from 1 surface water intake.
- Most recent formal enforcement: compliance order (no penalty) by Oklahoma, May 2025.
- Record on file since 1993, with 25 health-based violations before October 19, 2016.
- Lead pipe inventory: 0 lead and 1,219 unknown out of 1,219 service lines.
Check whether Tishomingo Municipal Authority 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 |
|---|---|---|---|---|
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jan 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Long Term 2 Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Nov 1, 2024 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2024 | Resolved | Yes |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2024 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2024 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2024 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Apr 1, 2022 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2022 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Feb 1, 2021 | Resolved | Yes |
Monitoring and reporting issues
Since October 2016Missed tests or reports, not contaminants found above a limit.
| Issue | Start date | Status |
|---|---|---|
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Chlorine
Monitoring and reporting
|
Nov 1, 2025 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
|
Consumer Confidence Rule
OTHER
|
Jul 1, 2025 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule
Monitoring and reporting
|
Jun 1, 2025 | Resolved |
|
Lead and Copper Rule
Monitoring and reporting
|
Jan 1, 2025 | Resolved |
|
Revised Total Coliform Rule
Monitoring violation
|
Nov 1, 2021 | Resolved |
|
Chlorine
Monitoring and reporting
|
Oct 1, 2021 | Resolved |
|
Asbestos
Monitoring and reporting
|
Jan 1, 2021 | Resolved |
Full record since 1993
EPA's records for Tishomingo Municipal Authority go back to 1993. Before October 19, 2016 they list 25 health-based violations (24 resolved, 1 archived by EPA without a recorded fix) and 33 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 4 | 7 |
| 2000s | 2 | 19 |
| 2010 to October 18, 2016 | 19 | 7 |
| 2020s | 14 | 8 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began July 2014, Resolved.
Show all 25 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.085 mg/L, federal limit 0.06 mg/L (1.4 times the limit)
|
Jul 1, 2014 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Feb 1, 2014 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Feb 1, 2014 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2014 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Dec 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2013 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 2013 | Resolved |
|
Total Coliform (acute)
Contaminant limit exceeded
|
Sep 1, 2013 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jul 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2013 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2012 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.07 mg/L, federal limit 0.06 mg/L (1.2 times the limit)
|
Oct 1, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jul 1, 2011 | Resolved |
|
Lead and Copper Rule
Treatment technique failure
|
Apr 11, 2011 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.061 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Apr 1, 2010 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
Measured 0.062 mg/L, federal limit 0.06 mg/L (at or just above the limit)
|
Jan 1, 2010 | Resolved |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Dec 1, 2006 | Resolved |
|
Haloacetic Acids (HAA5)
Contaminant limit exceeded
|
Oct 1, 2004 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Mar 1, 1995 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Sep 1, 1994 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 1994 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 1993 | Archived |
Enforcement actions
Oklahoma regulators took 20 formal enforcement actions against Tishomingo Municipal Authority and issued 1 boil water order between 1997 and 2025, filed as 23 records in EPA's data. The most recent was a compliance order (no penalty) in May 2025.
| Date | By | Action | Violations covered |
|---|---|---|---|
| May 8, 2025 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Long Term 2 Enhanced Surface Water Treatment Rule |
| Apr 3, 2025 | Oklahoma | Compliance order (no penalty) | 3 violations (3 health-based): Long Term 2 Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule |
| Jan 7, 2025 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Long Term 2 Enhanced Surface Water Treatment Rule |
| Aug 30, 2024 | Oklahoma | Compliance order (no penalty) | 4 violations (4 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule |
| Jun 22, 2022 | Oklahoma | Compliance order (no penalty) | 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule |
| Nov 5, 2021 | Oklahoma | Compliance order (no penalty) | 3 violations (3 health-based): Interim Enhanced Surface Water Treatment Rule |
| Dec 4, 2014 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Jun 20, 2014 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| May 5, 2014 | Oklahoma | Compliance order with a penalty | 3 violations (3 health-based): Interim Enhanced Surface Water Treatment Rule |
| Mar 17, 2014 | Oklahoma | Compliance order with a penalty | 3 violations (3 health-based): CARBON, TOTAL, Haloacetic Acids (HAA5) |
| Sep 20, 2013 | Oklahoma | Boil water order | 1 violation (1 health-based): Total Coliform |
| Jul 24, 2013 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| May 31, 2013 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Jan 31, 2013 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Feb 10, 2012 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Nov 3, 2011 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| May 18, 2010 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Haloacetic Acids (HAA5) |
| Feb 2, 2007 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Jan 10, 2006 | Oklahoma | Compliance order with a penalty | 1 violation: Chlorine |
| Jul 26, 2005 | Oklahoma | Compliance order with a penalty | 3 violations (1 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL, Haloacetic Acids (HAA5) |
| Nov 7, 1997 | Oklahoma | Compliance order (no penalty) | 1 violation: Lead and Copper Rule |
What the violations mean
Interim Enhanced Surface Water Treatment Rule
8 incidentsThe system did not meet a filtration or treatment requirement for surface water
Inadequate treatment of surface water can let pathogens such as Cryptosporidium and Giardia through
Long Term 2 Enhanced Surface Water Treatment Rule
3 incidentsThe system failed required surface water treatment or filtration standards
Untreated or inadequately treated surface water can contain bacteria and viruses
Surface Water Treatment Rule
3 incidentsThe system did not complete a treatment step or action that the Surface Water Treatment Rule requires (a treatment technique violation).
The utility had to notify customers about each of these violations.
Where the water comes from
Tishomingo Municipal Authority draws water from 1 surface water intake.
Annual water quality report
Tishomingo Municipal Authority 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