Public water system record

Calera PWA

Serves Calera, Bryan County, OK · 2,815 people served

Federal records show 33 health-based violations and 9 monitoring/reporting issues for Calera PWA in the last ten years. The most serious issue in this window was a resolved LEAD AND COPPER RULE REVISIONS violation.

OK2000702
CALERA
OK
2,815 served

System profile

Source water Groundwater

ZIP 74730

EPA system ID OK2000702

Verify this system on EPA ECHO →

Health-based violations, last 10 years: 33
Resolved: 33
Unresolved: 0
Any acute record: No
Monitoring issues, last 10 years: 9

Key facts

Calera PWA draws water from 4 wells.
Highest measured level in the last 10 years: Haloacetic Acids (HAA5), 0.121 mg/L, federal limit 0.06 mg/L (2 times the limit), 2023.
Most recent formal enforcement: compliance order with a penalty by Oklahoma, May 2023.
Record on file since 1992, with 2 health-based violations before October 19, 2016.

Check whether Calera PWA serves your address

Health-based violations

Since October 2016

Violation 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	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.073 mg/L, federal limit 0.06 mg/L (1.2 times the limit)	220	Apr 1, 2023	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Apr 1, 2023	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.12 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Jan 1, 2023	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.118 mg/L, federal limit 0.08 mg/L (1.5 times the limit)	220	Jan 1, 2023	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.117 mg/L, federal limit 0.06 mg/L (2 times the limit)	220	Jan 1, 2023	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.121 mg/L, federal limit 0.06 mg/L (2 times the limit)	220	Jan 1, 2023	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.102 mg/L, federal limit 0.08 mg/L (1.3 times the limit)	220	Oct 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.098 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Oct 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.092 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Oct 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.098 mg/L, federal limit 0.06 mg/L (1.6 times the limit)	220	Oct 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Jul 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Jul 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.079 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jul 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jul 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Apr 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.087 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Apr 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.077 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Apr 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.075 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Apr 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Jan 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.078 mg/L, federal limit 0.06 mg/L (1.3 times the limit)	220	Jan 1, 2022	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.085 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Jan 1, 2022	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.092 mg/L, federal limit 0.08 mg/L (1.2 times the limit)	220	Oct 1, 2021	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.085 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Oct 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.092 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Oct 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.093 mg/L, federal limit 0.06 mg/L (1.6 times the limit)	220	Oct 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Jul 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.089 mg/L, federal limit 0.06 mg/L (1.5 times the limit)	220	Jul 1, 2021	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.089 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Jul 1, 2021	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.086 mg/L, federal limit 0.08 mg/L (1.1 times the limit)	220	Jul 1, 2021	Resolved	No
Total Trihalomethanes (TTHMs) Contaminant limit exceeded Measured 0.082 mg/L, federal limit 0.08 mg/L (at or just above the limit)	220	Apr 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Apr 1, 2021	Resolved	No
Haloacetic Acids (HAA5) Contaminant limit exceeded Measured 0.081 mg/L, federal limit 0.06 mg/L (1.4 times the limit)	220	Apr 1, 2021	Resolved	No

Monitoring and reporting issues

Since October 2016

Missed tests or reports, not contaminants found above a limit.

Issue	Start date	Status
LEAD AND COPPER RULE REVISIONS RPT	Oct 17, 2024	Resolved
Revised Total Coliform Rule Monitoring violation	Aug 1, 2023	Resolved
Chlorine Monitoring and reporting	Jul 1, 2023	Resolved
Revised Total Coliform Rule Monitoring violation	Jul 1, 2023	Resolved
Chlorine Monitoring and reporting	Jul 1, 2023	Resolved
Revised Total Coliform Rule Monitoring violation	Jun 1, 2023	Resolved
Chlorine Monitoring and reporting	Apr 1, 2023	Resolved
Haloacetic Acids (HAA5) Monitoring and reporting	Sep 29, 2022	Resolved
Total Trihalomethanes (TTHMs) Monitoring and reporting	Sep 29, 2022	Resolved

Full record since 1992

EPA's records for Calera PWA go back to 1992. Before October 19, 2016 they list 2 health-based violations (2 resolved) and 4 monitoring or reporting violations.

Violations that began in	Health-based	Monitoring and reporting
1990s	2	2
2000s	0	1
2010 to October 18, 2016	0	1
2020s	33	9

Most recent health-based violation before October 19, 2016: Total Coliform, began August 1994, Resolved.

Show all 2 health-based violations before October 19, 2016

Contaminant	Start date	Status
Total Coliform Contaminant limit exceeded	Aug 1, 1994	Resolved
Total Coliform (acute) Contaminant limit exceeded	Jul 1, 1992	Resolved

Enforcement actions

Oklahoma regulators took 9 formal enforcement actions against Calera PWA between 2021 and 2023. The most recent was a compliance order with a penalty in May 2023.

Date	By	Action	Violations covered
May 18, 2023	Oklahoma	Compliance order with a penalty	32 violations (32 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Apr 12, 2023	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Feb 3, 2023	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Nov 15, 2022	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jun 29, 2022	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Apr 20, 2022	Oklahoma	Compliance order (no penalty)	3 violations (3 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jan 6, 2022	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Nov 5, 2021	Oklahoma	Compliance order (no penalty)	4 violations (4 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)
Jul 2, 2021	Oklahoma	Compliance order (no penalty)	3 violations (3 health-based): Haloacetic Acids (HAA5), Total Trihalomethanes (TTHMs)

What the violations mean

Haloacetic Acids (HAA5)

18 incidents

Haloacetic acid byproducts exceeded the federal limit

Long-term exposure to HAAs may increase cancer risk

Total Trihalomethanes (TTHMs)

14 incidents

Disinfection byproduct levels exceeded the federal limit

Long-term TTHM exposure may increase bladder cancer risk

LEAD AND COPPER RULE REVISIONS

1 incident

The 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

Calera PWA draws water from 4 wells.

Annual water quality report

Calera PWA 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