Aqua Ohio - Marion
EPA ID: OH5100414 · 47,102 people served · 7 ZIP codes
ZipCheckup's reading of EPA SDWIS for Aqua Ohio - Marion (OH5100414): no EPA violations recorded in the last five years. With a five-year violation-free history, Aqua Ohio - Marion delivers safe water to 47,102 residents.
Data: EPA SDWIS
Service Area Map
Coverage area for Aqua Ohio - Marion Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The Aqua Ohio - Marion serves a community with a median household income of $69,621 and an estimated 85,791 residents across its service area. Approximately 72% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 49% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
🌊 Where Does Your Water Come From?
Aqua Ohio - Marion's water is drawn from rivers, lakes, or reservoirs. Surface water sources are more exposed to agricultural runoff, stormwater, and upstream discharges, but they typically receive more intensive treatment before reaching your tap.
Wastewater Proximity Note: This service area ranks in the 61th percentile nationally for proximity to wastewater discharge points. Surface water sources near wastewater outfalls may face additional treatment challenges.
Superfund Proximity Note: This service area ranks in the 66th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 25 detections recorded. 5 exceed federal EPA limits (4 ppt for PFOA/PFOS).
Comparable Water Systems
Similar-sized systems in Ohio
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
Aqua Ohio - Marion (EPA ID: OH5100414) is a community water system in Ohio that serves approximately 47,102 people from surface water sources.
This system provides water to 7 ZIP codes across 7 communities.
Violation History
Lead & Copper
EPA Lead and Copper Rule evidence attributed directly to this water system:
| Lead Level | Exceeds Action Level | Sample Date |
|---|---|---|
| 0.0037 mg/L | No | N/A |
No copper action-level exceedance record appears for this PWSID in the accepted LCR snapshot. This does not establish a clean copper measurement.
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 1 (High Risk)
The EPA recommends testing homes in Zone 1 and Zone 2 areas for radon.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: Service area ZIP codes sourced from EPA Community Water System Service Area Boundaries v3 (March 2026 release). These ZIPs reflect the actual deployment footprint recorded by OH or modeled from parcel and building-footprint data.
- 43302 - Marion
- 43314 - Caledonia
- 43315 - Cardington
- 43337 - Morral
- 43342 - Prospect
- 43356 - Waldo
- 44833 - Galion
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Aqua Ohio - Marion (OH5100414) on EPA.gov.
Frequently Asked Questions
Is Aqua Ohio - Marion water safe to drink?
The accepted 2026Q2 ECHO snapshot contains zero violation records for Aqua Ohio - Marion in the inclusive 2021-2026 record-year window. This is a compliance-record finding, not a guarantee about water at a specific tap.
How many people does Aqua Ohio - Marion serve?
Aqua Ohio - Marion serves approximately 47,102 people across 7 ZIP codes in Ohio.
Where does Aqua Ohio - Marion get its water?
The primary water source is surface water.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
How Water Systems Appear in Rankings
Water systems are evaluated by violation history, contaminant detections, and service population. Larger systems with more service connections appear in more rankings.
Frequently Asked Questions
How to cite this page
ZipCheckup. (n.d.). Aqua Ohio - Marion, OH: Serves 47K People. https://zipcheckup.com/water-system/oh5100414/
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title = {{Aqua Ohio - Marion, OH: Serves 47K People}},
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url = {https://zipcheckup.com/water-system/oh5100414/}
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