Water Quality in Copan, OK: 56 Violations - Grade C
Grade C · Score 68/100 · 4 water systems · Updated 2026-07-18
Copan's water has moderate compliance issues. Residents in affected areas should consider filtration.
Data: EPA Safe Drinking Water Information System (SDWIS) Last verified: 2026-07-18
The compliance history for Copan, OK includes 56 water violations on file with the EPA - a federal tally that spans health-based exceedances, monitoring failures, and enforcement actions logged under the Safe Drinking Water Act.
Water Quality by ZIP Code in Copan
Copan is covered by a single ZIP code, so one water-quality profile applies citywide. See the contaminant data below.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 74022 | C | 68 | 56 | 21 | View report → |
Violation Trend
EPA violations recorded for water systems serving Copan.
Water Quality Overview
Copan, 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 Copan have accumulated 56 EPA violations, including 21 health-based violations. These violations are tracked across 1 ZIP code serving approximately 1,710 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Copan'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 Copan water systems is 0.0058 mg/L - within EPA limits. No ZIP codes exceed the EPA lead action level.
With 71% of homes built before 1986, Copan 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 Copan
Copan is served by 4 community water systems regulated under the Safe Drinking Water Act. These systems collectively serve approximately 1,710 people across 1 ZIP code.
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 Copan. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Copan
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 Copan Water Systems
The following contaminants have been detected or caused violations across Copan's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Fecal Coliform | Microbiological | N/A | 21 | 1 | Yes |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 0.06 mg/L | 14 | 1 | Yes |
| Lead and Copper Rule | Treatment Technique | N/A | 6 | 1 | No |
| E. coli | Microbiological | N/A | 4 | 1 | Yes |
| Chlorite | Disinfection Byproducts | 1 mg/L | 2 | 1 | No |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 2 | 1 | No |
| Stage 2 DBP Rule | Treatment Technique | N/A | 2 | 1 | Yes |
| Surface Water Treatment Rule | Treatment Technique | N/A | 1 | 1 | No |
| Stage 1 DBP 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 Copan:
| Year | Total Violations | Health-Based |
|---|---|---|
| 2024 | 3 | 3 |
| 2025 | 12 | 12 |
Violations have increased from 3 in 2024 to 12 in 2025. This trend warrants monitoring.
EPA Enforcement History
The EPA and state regulators have taken 9 enforcement actions against water systems serving Copan. Recent actions:
| Date | Action Type |
|---|---|
| 2026-03-31 | EPA Formal Action |
| 2026-03-19 | EPA Formal Action |
| 2026-03-12 | EPA Formal Action |
| 2025-12-16 | State Order Extension |
| 2025-12-09 | State Informal Action |
| 2025-12-09 | State Informal Enforcement |
| 2025-12-06 | State Informal Action |
| 2025-09-18 | State Order Extension |
| 2025-08-20 | State Informal Action |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2026-03-31.
Copan vs. Nearby Oklahoma Cities
How Copan's water quality compares to similar cities in Oklahoma:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Copan | C | 56 | 4 | 1,710 |
| Cherokee | B | 2 | 1 | 1,708 |
| Rose | C | 0 | 6 | 1,716 |
| Oktaha | C | 15 | 4 | 1,720 |
Common Questions About Copan Water
These are the most common questions residents search for about water quality in Copan, Oklahoma:
Is Copan water hard or soft? Water hardness varies by source. Copan's 4 water systems use multiple sources. Check your ZIP code report for specific hardness data.
Can I drink Copan tap water? Copan's water receives a grade of C (68/100). There are 21 health-based violations - consider filtration.
What is the best water filter for Copan? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Copan vs. Oklahoma Average
Understanding how Copan 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 Copan.
ZIP Codes in Copan
Copan spans 1 ZIP code. The ZIP with the lowest water quality score is 74022. 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.