Water Quality in Greenville, OH: 1 Violation — Grade C
Grade C · Score 57/100 · 1 water system · Updated 2026-05-03
Greenville'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
Reviewing EPA compliance files for Greenville, OH surfaces 1 documented water violation — each categorized by violation type and linked to the utility that drew the federal citation.
Water Quality by ZIP Code in Greenville
Water quality varies across Greenville's 1 ZIP codes. Check your specific ZIP for detailed contaminant data.
| ZIP Code | Grade | Score | Violations | Health | |
|---|---|---|---|---|---|
| 45331 | C | 57 | 1 | 0 | View report → |
Water Quality Overview
Greenville, Ohio receives a water quality grade of C with an overall score of 57 out of 100, based on EPA compliance data from the Safe Drinking Water Information System (SDWIS).
The 1 water system serving Greenville have accumulated 1 EPA violations (all monitoring/reporting type). These violations are tracked across 1 ZIP codes serving approximately 13,227 people.
What Grade C Means
A grade of C indicates moderate compliance issues. Greenville'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
Lead testing data for Greenville is currently being collected. The EPA requires all community water systems to test for lead under the Lead and Copper Rule.
With 81% of homes built before 1986, Greenville 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.
Radon Risk
Greenville is in EPA Radon Zone 1 (High risk). The EPA recommends all homes in Zone 1 areas be tested for radon. Radon is the second leading cause of lung cancer after smoking.
Water Systems Serving Greenville
Greenville is served by 1 community water system regulated under the Safe Drinking Water Act. These systems collectively serve approximately 13,227 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 4 enforcement actions against water systems serving Greenville. Enforcement actions range from informal compliance assistance to formal orders and penalties.
How to Check Your Water in Greenville
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 Greenville Water Systems
The following contaminants have been detected or caused violations across Greenville's water systems:
| Contaminant | Category | MCL | Violations | ZIPs Affected | Health-Based |
|---|---|---|---|---|---|
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 0.08 mg/L | 1 | 1 | No |
MCL = Maximum Contaminant Level (EPA enforceable standard). Health-based violations indicate levels that may pose direct health risks.
EPA Enforcement History
The EPA and state regulators have taken 4 enforcement actions against water systems serving Greenville. Recent actions:
| Date | Action Type |
|---|---|
| 2022-06-02 | State Informal Action |
| 2022-05-16 | State Informal Action |
| 2022-05-16 | State Informal Enforcement |
| 2022-05-10 | State Order Extension |
Enforcement actions range from informal compliance assistance to formal orders and penalties. The most recent action was on 2022-06-02.
Greenville vs. Nearby Ohio Cities
How Greenville's water quality compares to similar cities in Ohio:
| City | Grade | Violations | Systems | Population |
|---|---|---|---|---|
| Greenville | C | 1 | 1 | 13,227 |
| Palestine | D | 0 | 1 | 13,227 |
| Bellefontaine | C | 4 | 1 | 13,249 |
| Zanesfield | D | 0 | 1 | 13,249 |
Common Questions About Greenville Water
These are the most common questions residents search for about water quality in Greenville, Ohio:
Is Greenville water hard or soft? Water hardness varies by source. Greenville's 1 water system uses a single source. Check your ZIP code report for specific hardness data.
Can I drink Greenville tap water? Greenville's water receives a grade of C (57/100). No health-based violations have been recorded, but home testing is always recommended.
What is the best water filter for Greenville? A NSF/ANSI 53-certified filter for lead removal is a good general choice. See our Water Filter Matcher for personalized recommendations.
Greenville vs. Ohio Average
Understanding how Greenville compares to the broader Ohio 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 Greenville.
ZIP Codes in Greenville
Greenville spans 1 ZIP code. The ZIP with the lowest water quality score is 45331. 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.