Water Quality in Chickasha, OK: 42 Violations — Grade C
Grade C · Score 63/100 · 3 water systems · Updated 2026-05-03
Chickasha'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
Water systems in Chickasha, OK have accumulated 42 EPA violations across the full compliance record — a dataset that captures reportable health-based exceedances, monitoring lapses, and enforcement actions filed with the federal Safe Drinking Water Information System.
Water Quality by ZIP Code in Chickasha
Water quality varies across Chickasha's 2 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 73018 | C | 60 | 21 | 14 | View report → |
| 73023 | C | 65 | 21 | 14 | View report → |
Violation Trend
EPA violations recorded for water systems serving Chickasha.
Water Quality Overview
Chickasha, Oklahoma receives a water quality grade of C with an overall score of 63 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 3 water systems serving Chickasha have accumulated 42 EPA violations, including 28 health-based violations. These violations are tracked across 2 ZIP codes serving approximately 16,976 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Chickasha'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 Chickasha water systems is 0.0038 mg/L — within EPA limits. No ZIP codes exceed the EPA lead action level.
With 75% of homes built before 1986, Chickasha 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 Chickasha
Chickasha is served by 3 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 16,976 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 Chickasha. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Chickasha
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 Chickasha Water Systems
The following contaminants have been detected or caused violations across Chickasha's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Fecal Coliform | Microbiological | N/A | 22 | 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 | 2 | 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 Chickasha:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2021 | 8 | 8 |
| 2022 | 2 | 2 |
| 2023 | 4 | 4 |
| 2024 | 4 | 4 |
Violations have decreased from 8 in 2021 to 4 in 2024, indicating improving compliance.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Chickasha. Recent actions:
| Date | Action Type |
|---|---|
| 2025-07-11 | State Informal Action |
| 2025-05-29 | State Informal Action |
| 2024-05-31 | State Order Extension |
| 2024-05-15 | State Informal Action |
| 2024-05-15 | State Informal Enforcement |
| 2024-04-16 | State Filed Suit |
| 2024-02-21 | State Informal Action |
| 2024-02-16 | State Order Extension |
| 2024-02-08 | State Filed Suit |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2025-07-11.
Chickasha vs. Nearby Oklahoma Cities
How Chickasha's water quality compares to similar cities in Oklahoma:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Chickasha | C | 42 | 3 | 16,976 |
| Pryor | B | 16 | 5 | 17,228 |
| Wagoner | C | 200 | 5 | 16,242 |
| Concho | C | 0 | 1 | 16,212 |
Common Questions About Chickasha Water
These are the most common questions residents search for about water quality in Chickasha, Oklahoma:
Is Chickasha water hard or soft? Water hardness varies by source. Chickasha's 3 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Chickasha tap water? Chickasha's water receives a grade of C (63/100). There are 28 health-based violations — consider filtration.
What is the best water filter for Chickasha? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Chickasha vs. Oklahoma Average
Understanding how Chickasha 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 Chickasha.
ZIP Codes in Chickasha
Chickasha spans 2 ZIP codes. The ZIP with the lowest water quality score is 73018. 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.