Coweta Tap Water Quality: Is It Safe to Drink? (2026 Report)
Serving 13,701 residents · Oklahoma
What's In Coweta's Tap Water?
34
Contaminants Tested
0
Exceed EPA Limits
0
Above EPA Goals
EPA Violation History
53
Violations (last 5yr)
34
Unresolved
33
Health-Related
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2025 – September 30, 2025Rule: Stage 2 DBPRVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2025 – September 30, 2025Rule: Stage 2 DBPRVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2025 – September 30, 2025Rule: Stage 2 DBPRVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2025 – September 30, 2025Rule: Stage 2 DBPRVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 30, 2025 – August 5, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 30, 2025 – August 5, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2025 – June 30, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2025 – March 31, 2025Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2024 – March 13, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2024 – March 13, 2025Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 2Resolved
Treatment technique violation
When: October 17, 2024 – July 15, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 3Resolved
Reporting violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 17, 2024 – July 15, 2025Rule: Ground Water RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2024 – December 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Failed treatment technique requirements
When: August 1, 2024 – August 31, 2024Rule: Surface Water Treatment RuleEnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Surface water treatment technique failure
When: July 1, 2024 – May 20, 2025Enforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2024 – September 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: April 1, 2024 – June 30, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 31, 2024 – June 5, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: March 1, 2024 – March 31, 2024Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: January 1, 2024 – March 31, 2024Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2024 – December 31, 2024Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2023 – June 5, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: December 30, 2023 – June 5, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: November 1, 2023 – November 30, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Resolved
Failed treatment technique requirements
When: November 1, 2023 – November 30, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 3Resolved
Missed required monitoring deadline
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: October 1, 2023 – October 31, 2023Rule: Surface Water Treatment RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Resolved
Failed treatment technique requirements
When: October 1, 2023 – October 31, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: October 1, 2023 – December 31, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 1 — URGENTResolved
Violation related to Nitrate
When: September 1, 2023 – September 30, 2023Rule: Surface Water Treatment RuleEnforcement: Formal — state order issued
TIER 3Resolved
Monitoring Violation
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: September 1, 2023 – September 30, 2023Rule: Total Coliform RuleEnforcement: Resolving — corrective action underway
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 2Unresolved
Exceeded the Maximum Contaminant Level (running average)
When: July 1, 2023 – September 30, 2023Rule: Stage 2 DBPREnforcement: Formal — state order issuedVerify on EPA.gov
TIER 3Resolved
Failed Level 2 Assessment under Revised Total Coliform Rule
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: July 1, 2023 – September 30, 2023Rule: Stage 1 DBPREnforcement: Resolving — corrective action underway
TIER 3Resolved
Failed to conduct Level 2 Assessment
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: June 30, 2023 – June 5, 2024Rule: Stage 2 DBPREnforcement: Resolving — corrective action underway
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2023 – December 31, 2023Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
TIER 3Unresolved
Exceeded the MCL for disinfection byproducts
This is a paperwork/process violation — it does not mean a contaminant was detected at unsafe levels.
When: January 1, 2023 – December 31, 2023Enforcement: Informal — resolved cooperativelyVerify on EPA.gov
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Coweta, Oklahoma tap water receives a grade of F (0/100), which is considered failing. 1 contaminant(s) exceed EPA maximum contaminant levels and 253 violation(s) are on record. Residents should consider using an NSF-certified water filter to reduce contaminant exposure.
What contaminants are in Coweta's water?
Of the 34 contaminants tested in Coweta's water supply, the most notable include PFOS. 1 contaminant(s) exceed EPA legal limits (MCLs). 1 contaminant(s) exceed EPA health goals (MCLGs), which are non-enforceable targets set at levels with no known health risk.
Does Coweta have any water quality violations?
Yes, Coweta has 253 EPA violation(s) on record, with the most recent in 2025. Violation types include MCL, MR, TT. 180 of these are health-based violations, which are the most serious category.
Do I need a water filter in Coweta?
Based on EPA data, using a water filter in Coweta is recommended. 1 contaminant(s) exceed legal limits. An NSF-certified filter — such as a reverse osmosis or activated carbon system — can effectively reduce many common contaminants. Choose a filter certified to remove the specific contaminants found in your area.
Where does Coweta's tap water come from?
Coweta's drinking water is sourced from surface water and supplied by COWETA PWA and 1 other water system(s). The system serves approximately 13,701 people. Surface water sources include rivers, lakes, and reservoirs.
How often is Coweta's water tested?
Under the Safe Drinking Water Act (SDWA), water utilities are required to regularly test for over 90 contaminants. Testing frequency varies by contaminant — some are tested monthly, others quarterly or annually. Coweta's water systems must report results to the EPA and publish an annual Consumer Confidence Report (CCR). The data on this page reflects the latest available EPA testing data.
How does Coweta's water compare to other cities in Oklahoma?
Coweta's water quality score of 0/100 earns a grade of F, which is considered failing. This is a concerning score that suggests significant water quality issues. Visit our Oklahoma state page to see how all cities in the state compare.
What should I do if I'm concerned about Coweta's water quality?
If you have concerns about Coweta's tap water, consider these steps: (1) Request your utility's annual Consumer Confidence Report for detailed local data. (2) Get your water independently tested through a state-certified laboratory. (3) Consider an NSF-certified water filter rated for the contaminants found in your area. (4) Contact your water utility (COWETA PWA) with specific questions. (5) Report water quality issues to your state drinking water program or the EPA Safe Drinking Water Hotline at 800-426-4791.