Public water system record
Chickasha Municipal Authority
Serves Chickasha, Grady County, OK · 16,036 people served
Federal records show 24 health-based violations and 5 monitoring/reporting issues for Chickasha Municipal Authority in the last ten years, including an unresolved LEAD AND COPPER RULE REVISIONS violation.
System profile
Source water
Surface water
ZIP
73018
EPA system ID
OK1010821
- Health-based violations, last 10 years
- 24
- Resolved
- 19
- Unresolved
- 1
- Archived by EPA
- 4
- Any acute record
- Yes
- Monitoring issues, last 10 years
- 5
Key facts
- Chickasha Municipal Authority draws water from 1 surface water intake.
- Highest measured level in the last 10 years: Total Trihalomethanes (TTHMs), 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit), 2016.
- Most recent formal enforcement: compliance order (no penalty) by EPA, March 2026.
- Record on file since 1992, with 38 health-based violations before October 19, 2016.
Check whether Chickasha 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 |
|---|---|---|---|---|
|
LEAD AND COPPER RULE REVISIONS
Treatment technique failure
|
350 | Oct 17, 2024 |
Active
Enforcement action in place
|
No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2023 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2022 | Resolved | Yes |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2021 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2021 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jul 1, 2021 | Resolved | Yes |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2020 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Sep 1, 2020 | Resolved | Yes |
|
Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2020 | Resolved | No |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2020 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Oct 1, 2019 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Aug 1, 2019 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2019 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Jun 1, 2019 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | May 1, 2019 | Resolved | Yes |
|
Interim Enhanced Surface Water Treatment Rule
Treatment technique failure
|
120 | Mar 1, 2019 | Resolved | Yes |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
220 | Oct 1, 2016 | 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 |
Active
Enforcement action in place
|
|
Revised Total Coliform Rule
Monitoring violation
|
Mar 1, 2024 | Resolved |
|
Chlorine
Monitoring and reporting
|
Jan 1, 2024 | Resolved |
|
Consumer Confidence Rule
OTHER
|
Oct 2, 2023 | Resolved |
|
Nitrate-Nitrite
Monitoring and reporting
|
Jan 1, 2016 |
Archived
Violation period ended. EPA no longer counts it toward current compliance, but no fix was formally recorded.
|
Full record since 1992
EPA's records for Chickasha Municipal Authority go back to 1992. Before October 19, 2016 they list 38 health-based violations (35 resolved, 3 archived by EPA without a recorded fix) and 18 monitoring or reporting violations.
| Violations that began in | Health-based | Monitoring and reporting |
|---|---|---|
| 1990s | 5 | 6 |
| 2000s | 18 | 3 |
| 2010 to October 18, 2016 | 15 | 9 |
| October 19, 2016 to 2019 | 6 | 0 |
| 2020s | 17 | 4 |
Most recent health-based violation before October 19, 2016: Total Trihalomethanes (TTHMs), began October 2016, Resolved.
Show all 38 health-based violations before October 19, 2016
| Contaminant | Start date | Status |
|---|---|---|
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Oct 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.1 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Jul 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Apr 1, 2016 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Jan 1, 2016 | 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 |
|
Interim Enhanced Surface Water Treatment Rule (acute)
Treatment technique failure
|
Aug 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.097 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jul 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.084 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Apr 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.115 mg/L, federal limit 0.08 mg/L (1.4 times the limit)
|
Jan 1, 2015 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.103 mg/L, federal limit 0.08 mg/L (1.3 times the limit)
|
Oct 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.09 mg/L, federal limit 0.08 mg/L (1.1 times the limit)
|
Jul 1, 2014 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jul 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.124 mg/L, federal limit 0.08 mg/L (1.6 times the limit)
|
Apr 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.095 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Jan 1, 2014 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)
|
Oct 1, 2013 | Resolved |
|
Total Trihalomethanes (TTHMs)
Contaminant limit exceeded
Measured 0.081 mg/L, federal limit 0.08 mg/L (at or just above the limit)
|
Oct 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2007 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2007 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Aug 1, 2006 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2004 | Archived |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2004 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2004 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Oct 1, 2003 | 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, 2003 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jul 1, 2003 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2003 | Resolved |
|
Total Coliform
Contaminant limit exceeded
|
Jun 1, 2003 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Apr 1, 2003 | Resolved |
|
CARBON, TOTAL
Treatment technique failure
|
Jan 1, 2003 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 2002 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jun 1, 2002 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Feb 1, 2002 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jan 1, 2002 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Dec 1, 1993 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Nov 1, 1993 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Oct 1, 1993 | Resolved |
|
Surface Water Treatment Rule
Treatment technique failure
|
Aug 1, 1993 | Archived |
|
Surface Water Treatment Rule
Treatment technique failure
|
Jul 1, 1993 | Archived |
Enforcement actions
Oklahoma regulators and EPA took 33 formal enforcement actions against Chickasha Municipal Authority between 1994 and 2026. The most recent was a compliance order (no penalty) in March 2026.
| Date | By | Action | Violations covered |
|---|---|---|---|
| Mar 12, 2026 | EPA | Compliance order (no penalty) | 2 violations (1 health-based): LEAD AND COPPER RULE REVISIONS |
| Apr 16, 2024 | Oklahoma | Compliance order with a penalty | 4 violations (4 health-based): Interim Enhanced Surface Water Treatment Rule |
| Feb 8, 2024 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Oct 5, 2023 | Oklahoma | Compliance order (no penalty) | 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule |
| Jan 3, 2023 | Oklahoma | Compliance order (no penalty) | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Jan 11, 2022 | Oklahoma | Compliance order (no penalty) | 7 violations (7 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule |
| Nov 20, 2020 | Oklahoma | Compliance order (no penalty) | 4 violations (4 health-based): Interim Enhanced Surface Water Treatment Rule, Surface Water Treatment Rule |
| Dec 4, 2019 | Oklahoma | Compliance order (no penalty) | 2 violations (2 health-based): Interim Enhanced Surface Water Treatment Rule |
| Aug 27, 2019 | Oklahoma | Compliance order (no penalty) | 4 violations (4 health-based): Interim Enhanced Surface Water Treatment Rule |
| Mar 9, 2016 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Dec 2, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Oct 26, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Interim Enhanced Surface Water Treatment Rule |
| Sep 9, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Jun 9, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Mar 11, 2015 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Nov 4, 2014 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| Aug 27, 2014 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Total Trihalomethanes (TTHMs) |
| May 5, 2014 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Total Trihalomethanes (TTHMs) |
| Mar 7, 2008 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Total Trihalomethanes (TTHMs), CARBON, TOTAL |
| Nov 16, 2004 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Sep 7, 2004 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| May 18, 2004 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Apr 27, 2004 | Oklahoma | Compliance order (no penalty) | 7 violations (7 health-based): CARBON, TOTAL, Haloacetic Acids (HAA5) |
| Feb 23, 2004 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Haloacetic Acids (HAA5), CARBON, TOTAL |
| Nov 12, 2003 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Sep 11, 2003 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Surface Water Treatment Rule |
| Aug 12, 2003 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| May 8, 2003 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): CARBON, TOTAL |
| Sep 9, 2002 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Surface Water Treatment Rule |
| Jul 26, 2002 | Oklahoma | Compliance order with a penalty | 1 violation (1 health-based): Surface Water Treatment Rule |
| Apr 19, 2002 | Oklahoma | Compliance order with a penalty | 2 violations (2 health-based): Surface Water Treatment Rule |
| Sep 22, 1994 | Oklahoma | Compliance order (no penalty) | 4 violations (3 health-based): Total Coliform, Surface Water Treatment Rule |
| Sep 13, 1994 | Oklahoma | Compliance order (no penalty) | 4 violations (3 health-based): Total Coliform, Surface Water Treatment Rule |
What the violations mean
Interim Enhanced Surface Water Treatment Rule
19 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
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.
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.
Total Trihalomethanes (TTHMs)
1 incidentDisinfection byproduct levels exceeded the federal limit
Long-term TTHM exposure may increase bladder cancer risk
Where the water comes from
Chickasha Municipal Authority draws water from 1 surface water intake. 1 other community water system buys water from Chickasha Municipal Authority. 1 other public water system has an emergency connection to Chickasha Municipal Authority.
Community systems that buy water from it
- Norge Water and Sewer Co., Inc Chickasha, OK
Annual water quality report
Chickasha 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.
Systems serving 10,000 or more people must mail or deliver the report to every customer, and from 2027 they must send it twice a year.
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