Water Quality in Coweta, OK: 28 Violations — Grade D
Grade D · Score 52/100 · 2 water systems · Updated 2026-05-03
Coweta's water has significant violations. Water testing and filtration are recommended.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Tracked under the EPA Safe Drinking Water program, Coweta, OK shows 28 water violations on file — findings that span multiple violation categories and are detailed system by system in the data grid further down the page.
Water Quality by ZIP Code in Coweta
Water quality varies across Coweta's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 74429 | D | 52 | 28 | 14 | View report → |
Violation Trend
EPA violations recorded for water systems serving Coweta.
Water Quality Overview
Coweta, Oklahoma receives a water quality grade of D with an overall score of 52 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 2 water systems serving Coweta have accumulated 28 EPA violations, including 14 health-based violations. These violations are tracked across 1 ZIP codes serving approximately 13,701 people.
What Grade D Means
A grade of D indicates significant compliance issues. Coweta's water systems have accumulated violations that suggest ongoing water quality challenges. Residents should check their specific ZIP code report and consider water testing or filtration.
Lead Levels
Lead testing data for Coweta is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
Water Systems Serving Coweta
Coweta is served by 2 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 13,701 people across 1 ZIP codes.
Each water system is identified by a Public Water System ID (PWSID) and is required to:
- Test for over 90 regulated contaminants on a regular schedule
- Report results to the EPA and state regulators
- Issue an annual Consumer Confidence Report (CCR) to all customers
- Take corrective action when violations occur
The EPA has taken 10 enforcement actions against water systems serving Coweta. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Coweta
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels, violation history, and safety scores
Request your CCR — your water utility must provide an annual Consumer Confidence Report with detailed test results for all monitored contaminants
Get a home test — certified kits cost $20–$50 and test for lead, bacteria, and common contaminants. Professional lab tests ($150–$400) cover a broader panel
Consider filtration — NSF-certified filters can remove specific contaminants. Reverse osmosis removes the broadest range; activated carbon is effective for chlorine and many organics
Check for advisories — monitor your local utility website and local news for boil water advisories or system alerts
Contaminants Detected in Coweta Water Systems
The following contaminants have been detected or caused violations across Coweta's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 12 | 1 | Yes |
| Fecal Coliform | Microbiological | N/A | 4 | 1 | Yes |
| E. coli | Microbiological | N/A | 3 | 1 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 2 | 1 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 2 | 1 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 1 | 1 | No |
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
Violation Trend Over Time
Year-by-year EPA violations recorded for water systems serving Coweta:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2023 | 1 | 1 |
| 2024 | 8 | 8 |
| 2025 | 6 | 6 |
Violations have increased from 1 in 2023 to 6 in 2025. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 10 enforcement actions against water systems serving Coweta. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-16 | State Informal Action |
| 2025-08-07 | State Informal Enforcement |
| 2025-08-07 | State Filed Suit |
| 2025-08-05 | State Order Extension |
| 2025-07-29 | State Informal Action |
| 2025-07-15 | State Order Extension |
| 2025-07-11 | State Informal Action |
| 2025-06-09 | State Informal Action |
| 2025-05-27 | State Informal Action |
| 2025-05-20 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-16.
Coweta vs. Nearby Oklahoma Cities
How Coweta's water quality compares to similar cities in Oklahoma:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Coweta | D | 28 | 2 | 13,701 |
| Marble City | D | 0 | 1 | 13,460 |
| Eufaula | B | 45 | 4 | 13,284 |
| Spiro | C | 44 | 3 | 13,094 |
Common Questions About Coweta Water
These are the most common questions residents search for about water quality in Coweta, Oklahoma:
Is Coweta water hard or soft? Water hardness varies by source. Coweta's 2 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Coweta tap water? Coweta's water receives a grade of D (52/100). There are 14 health-based violations — consider filtration.
What is the best water filter for Coweta? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Coweta vs. Oklahoma Average
Understanding how Coweta compares to the broader Oklahoma average helps contextualize your local water quality. Factors like water source, treatment methods, and infrastructure age all contribute to differences between cities in the same state.
To see how individual neighborhoods compare, check the ZIP code reports below — water quality can vary significantly even within Coweta.
ZIP Codes in Coweta
Coweta spans 1 ZIP code. The ZIP with the lowest water quality score is 74429. Each ZIP code has its own water quality profile based on the specific water system serving that area. Check each ZIP code for detailed contaminant data, violation history, and system information.
Data Sources
- Water quality: EPA Safe Drinking Water Information System (SDWIS)
- Lead/copper: EPA Lead and Copper Rule sampling data
- Radon: EPA Map of Radon Zones
- Enforcement: EPA ECHO database
- Filter recommendations: NSF/ANSI certified products
Updated daily.