Mercersburg Muni Water Authority
EPA ID: PA7280021 · 2,350 people served · 5 ZIP codes
5 open EPA findings remain on record at Mercersburg Muni Water Authority — the utility supplies approximately 2,350 people.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Worsening · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 5 (2021) to 1 (2025). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Mercersburg Muni Water Authority Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Mercersburg Muni Water Authority serves a community with a median household income of $84,160 and an estimated 35,231 residents across its service area. Approximately 63% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
🌊 Where Does Your Water Come From?
Mercersburg Muni Water Authority'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.
About 1% of homes in Franklin County, Pennsylvania rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites.
Infrastructure Risk
Detected Contaminants
How Mercersburg Muni Water Authority compares to EPA limits
What This Means For You
Haloacetic Acids (HAA5) at 1 mg/L exceeds the EPA maximum of 0.06 mg/L. Cancer risk; reproductive & developmental effects. Consider granular activated carbon (GAC) filtration.
Consumer Confidence Report Rule at 12 mg/L exceeds the EPA maximum of mg/L.
Contaminant 0700 at 9 mg/L exceeds the EPA maximum of mg/L.
Lead and Copper Rule at 6 mg/L exceeds the EPA maximum of mg/L.
E. coli at 6 Zero tolerance (any positive sample triggers immediate action) exceeds the EPA maximum of Zero tolerance (any positive sample triggers immediate action). Severe GI illness; potentially fatal kidney failure in children. Consider UV disinfection (99.99%) filtration.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 5 detections recorded.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
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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
MERCERSBURG MUNI WATER AUTH (EPA ID: PA7280021) is a community water system in Pennsylvania that serves approximately 2,350 people from surface water sources.
This system provides water to 5 ZIP codes across 5 communities.
Average Home Safety Score: D (51/100)
Based on water quality violations, lead levels, and radon risk across all ZIP codes served by this system.
Violation History
Recent Violations
| Date | Contaminant | Type | Status |
|---|---|---|---|
| July 11, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| June 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| April 1, 2025 | Chlorite | Monitoring | Unresolved |
| February 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| February 1, 2025 | Contaminant 0700 | Monitoring | Resolved |
| February 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| January 1, 2025 | Chlorite | Monitoring | Unresolved |
| January 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| January 1, 2025 | Contaminant 0700 | Monitoring | Resolved |
| January 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| August 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| August 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| July 11, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| June 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| June 1, 2024 | E. coli | Monitoring | Resolved |
| March 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| February 1, 2024 | Revised Total Coliform Rule | Monitoring | Resolved |
| February 1, 2024 | Contaminant 0700 | Monitoring | Resolved |
| February 1, 2024 | E. coli | Monitoring | Resolved |
| February 1, 2024 | Fecal Coliform | Monitoring | Resolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Consumer Confidence Report Rule | Reporting Failure | 12 | Yes |
| Contaminant 0700 | Other Violation | 9 | No |
| Lead and Copper Rule | Treatment Failure | 6 | No |
| E. coli | Microbiological | 6 | Yes |
| Revised Total Coliform Rule | Microbiological | 5 | No |
| Chlorite | Disinfection Byproducts | 2 | No |
| Total Organic Carbon | Disinfection Byproducts | 2 | No |
| Fecal Coliform | Microbiological | 2 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 1 | No |
| Radium-228 | Radionuclides | 1 | No |
Health Risk Details
E. coli (EPA limit: Zero tolerance (any positive sample triggers immediate action))
Severe GI illness; potentially fatal kidney failure in children At-risk groups: children under 5, elderly, immunocompromised individuals, pregnant women.
Removal methods: UV disinfection (99.99%), chlorination, reverse osmosis. Find the right filter →
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
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: 4 ZIP codes confirmed via EPA Community Water System Service Area Boundaries v3 plus 1 additional ZIP inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Mercersburg Muni Water Authority (PA7280021) on EPA.gov.
Frequently Asked Questions
Is Mercersburg Muni Water Authority water safe to drink?
Mercersburg Muni Water Authority has recorded 2 health-based violations in the past 5 years. While the system is required to treat water to meet federal standards, you may want to consider additional precautions such as a certified water filter.
How many people does Mercersburg Muni Water Authority serve?
Mercersburg Muni Water Authority serves approximately 2,350 people across 5 ZIP codes in Pennsylvania.
Where does Mercersburg Muni Water Authority get its water?
The primary water source is surface water.
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
This system reports zero confirmed lead service lines in its inventory. Unknown-material counts may still warrant verification.
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.
Frequently Asked Questions
What You Can Do
Test your water
Home test kits can detect lead, bacteria, and other contaminants at your tap. Find the right filter →
Check your specific ZIP code
Water quality can vary within a system. View nearest ZIP report →
Contact your utility
Mercersburg Muni Water Authority (EPA ID: PA7280021) — request the latest Consumer Confidence Report or ask about specific contaminants.