Water Quality in Jennings, OK: 654 Violations Recorded for Mapped Water Systems
5 water systems · 1 directly mapped ZIP records
Available EPA records report 654 violations across 1 directly mapped ZIP records with known counts for Jennings. This is compliance evidence, not a property-level tap-water verdict.
Data: EPA Safe Drinking Water Information System (SDWIS)
Water Quality by ZIP Code in Jennings
This table shows typed EPA water evidence only. Missing violation counts are displayed as N/A, not zero.
| ZIP Code | Violations | Health | |
|---|---|---|---|
| 74038 | 654 | 13 | View report → |
Water Quality Overview
Jennings, Oklahoma has directly mapped EPA water-system data for 1 ZIP codes. This page reports typed compliance facts and does not relabel the multi-source Home Safety Score as a drinking-water grade.
The available EPA records report 654 violations, including 13 health-based violations across 1 directly mapped ZIP record with reported counts.
Lead Levels
The average of the reported 90th-percentile lead results across the ZIP codes of Jennings is 0.0009 mg/L; the EPA action level of 0.015 mg/L applies to a water system's own 90th-percentile result and is not a safety threshold (EPA's health goal for lead is zero). No exceedances appear among the 1 ZIP records with known lead status.
With 57% of homes built before 1986, Jennings 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 Jennings
Jennings is served by 5 community water systems regulated under the Safe Drinking Water Act. About 2,204 people live in the area (1 ZIP code, Census); this is not the systems' reported service population.
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
EPA records list enforcement actions against water systems serving Jennings. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Jennings
Enter your ZIP code on ZipCheckup to see your specific water system data, including contaminant levels and violation history
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 Jennings Water Systems
The following contaminants have been detected or caused violations across Jennings's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Di(2-ethylhexyl) phthalate | Organic | 0.006 mg/L | 17 | 1 | No |
| Atrazine | Organic | 0.003 mg/L | 17 | 1 | No |
| Public Notice Rule | Reporting | N/A | 17 | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 13 | 1 | Yes |
| Chlorine | Disinfectant | 4 mg/L (MRDL) | 6 | 1 | No |
| Consumer Confidence Rule | Reporting | N/A | 6 | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 5 | 1 | Yes |
| Nitrate-Nitrite | Inorganic | 10 mg/L | 4 | 1 | No |
| 1,2,4-Trichlorobenzene | Organic | N/A | 4 | 1 | No |
| cis-1,2-Dichloroethylene | Organic | N/A | 4 | 1 | No |
| Xylenes, Total | Organic | N/A | 4 | 1 | No |
| Dichloromethane | Organic | N/A | 4 | 1 | No |
| o-Dichlorobenzene | Organic | N/A | 4 | 1 | No |
| p-Dichlorobenzene | Organic | N/A | 4 | 1 | No |
| Vinyl chloride | Organic | N/A | 4 | 1 | No |
The standard column shows the EPA Maximum Contaminant Level (MCL) except for lead and copper, whose value is an action level that triggers corrective steps and is not an MCL. Health-based violations are MCL, MRDL and treatment-technique violations.
Violation Trend Over Time
Year-by-year health-based EPA violations recorded for water systems serving Jennings (this history covers health-based records only):
| Year | Health-based violations |
|---|---|
| 2021 | 5 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 2 |
Health-based violations have decreased from 5 in 2021 to 2 in 2024, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken enforcement actions against water systems serving Jennings. Recent actions:
| Date | Action Type |
|---|---|
| 2026-03-23 | State Informal Action |
| 2026-03-23 | State Informal Enforcement |
| 2026-03-17 | EPA Formal Action |
| 2026-03-01 | State Informal Action |
| 2026-02-19 | State Informal Action |
| 2026-02-19 | State Informal Enforcement |
| 2026-01-23 | State Order Extension |
| 2025-11-21 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-03-23.
Jennings vs. Nearby Oklahoma Cities
How Jennings's water quality compares to similar cities in Oklahoma:
| City | Direct EPA ZIPs | Violations | Systems | Population |
|---|---|---|---|---|
| Jennings | 1 | 654 | 5 | 2,204 |
| Maysville | 1 | 164 | 5 | 2,210 |
| Okarche | 1 | 38 | 4 | 2,179 |
| Stonewall | 1 | 11 | 3 | 2,174 |
Common Questions About Jennings Water
These are the most common questions residents search for about water quality in Jennings, Oklahoma:
Is Jennings water hard or soft? Water hardness varies by source. Jennings's 5 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Jennings tap water? City-level EPA records cannot determine safety at a specific tap. The measured subset contains 13 health-based violations; check the affected utility record and consider certified testing.
What is the best water filter for Jennings? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Jennings vs. Oklahoma Average
Understanding how Jennings 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 Jennings.
ZIP Codes in Jennings
Jennings spans 1 ZIP code. EPA water-system coverage is available for 1 directly mapped ZIP code. 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
Source reporting periods vary. See each cited source for its publication schedule.