Water Quality in Atoka, OK: 112 Violations — Grade C
Grade C · Score 68/100 · 4 water systems · Updated 2026-05-03
Atoka's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-05-03
Looking at EPA compliance data for Atoka, OK, the record shows 112 violations — findings that span health-based exceedances, monitoring lapses, and enforcement events tied to local utilities in the SDWIS database.
Water Quality by ZIP Code in Atoka
Water quality varies across Atoka's 2 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 74542 | C | 66 | 56 | 39 | View report → |
| 74525 | B | 70 | 56 | 39 | View report → |
Violation Trend
EPA violations recorded for water systems serving Atoka.
Water Quality Overview
Atoka, Oklahoma receives a water quality grade of C with an overall score of 68 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 4 water systems serving Atoka have accumulated 112 EPA violations, including 78 health-based violations. These violations are tracked across 2 ZIP codes serving approximately 7,313 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Atoka's water systems have some violations that warrant attention. While the water may still be safe for most people, residents in affected ZIP codes should consider additional testing or filtration.
Lead Levels
The average 90th percentile lead level across Atoka water systems is 0.0011 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 57% of homes built before 1986, Atoka has a higher-than-average risk of lead from older plumbing. Lead solder was banned in 1986, and homes built before this date may have lead in pipes, solder joints, or fixtures.
Water Systems Serving Atoka
Atoka is served by 4 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 7,313 people across 2 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 20 enforcement actions against water systems serving Atoka. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Atoka
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 Atoka Water Systems
The following contaminants have been detected or caused violations across Atoka's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Chlorite | Disinfection Byproducts | 1 mg/L | 44 | 2 | Yes |
| Fecal Coliform | Microbiological | N/A | 18 | 2 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 10 | 2 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 8 | 2 | Yes |
| Stage 2 DBP Rule | Treatment Technique | N/A | 8 | 2 | Yes |
| Revised Total Coliform Rule | Microbiological | N/A | 4 | 2 | No |
| E. coli | Microbiological | N/A | 4 | 2 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 2 | 2 | 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 Atoka:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2024 | 4 | 4 |
| 2025 | 26 | 26 |
Violations have increased from 4 in 2024 to 26 in 2025. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 8 enforcement actions against water systems serving Atoka. Recent actions:
| Date | Action Type |
|---|---|
| 2025-09-29 | State Informal Action |
| 2025-09-19 | State Informal Action |
| 2025-09-19 | State Informal Enforcement |
| 2025-09-04 | State Order Extension |
| 2025-08-29 | State Informal Action |
| 2025-08-28 | State Order Extension |
| 2025-08-20 | State Informal Action |
| 2025-08-20 | State Informal Enforcement |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-09-29.
Atoka vs. Nearby Oklahoma Cities
How Atoka's water quality compares to similar cities in Oklahoma:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Atoka | C | 112 | 4 | 7,313 |
| Antlers | B | 34 | 2 | 7,372 |
| Okemah | B | 26 | 3 | 7,186 |
| Piedmont | B | 14 | 1 | 7,542 |
Common Questions About Atoka Water
These are the most common questions residents search for about water quality in Atoka, Oklahoma:
Is Atoka water hard or soft? Water hardness varies by source. Atoka's 4 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Atoka tap water? Atoka's water receives a grade of C (68/100). There are 78 health-based violations — consider filtration.
What is the best water filter for Atoka? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Atoka vs. Oklahoma Average
Understanding how Atoka 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 Atoka.
ZIP Codes in Atoka
Atoka spans 2 ZIP codes. The ZIP with the lowest water quality score is 74525. 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.