Guilford Water Authority
EPA ID: PA7280038 · 28,135 people served · 8 ZIP codes
While corrective steps may be in progress, Guilford Water Authority currently shows 1 EPA violation unresolved — serving a population of approximately 28,135.
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 1 (2022) to 2 (2024). The pattern suggests growing compliance challenges.
Service Area Map
Coverage area for Guilford Water Authority Source: EPA SDWIS service area boundaries.
Service area boundary — Grade D
Service Area Demographics
The Guilford Water Authority serves a community with a median household income of $71,504 and an estimated 130,025 residents across its service area. Approximately 68% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
💧 Where Does Your Water Come From?
Guilford Water Authority's water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
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 61th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
Detected Contaminants
How Guilford Water Authority compares to EPA limits
What This Means For You
Fecal Coliform at 56 presence exceeds the EPA maximum of presence.
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.
Chlorite at 3 mg/L exceeds the EPA maximum of 1 mg/L. Anemia and nervous system effects in infants and children. Consider ferrous sulfate reduction filtration.
Lead and Copper Rule at 2 mg/L exceeds the EPA maximum of mg/L.
Contaminant 1085 at 1 mg/L exceeds the EPA maximum of mg/L.
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 2 detections recorded.
Haloacetic Acids (HAA5) was detected in this water system. granular activated carbon (GAC) filtration can reduce exposure.
Find a certified water filter →Comparable Water Systems
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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
Guilford Water Authority (EPA ID: PA7280038) is a community water system in Pennsylvania that serves approximately 28,135 people from groundwater sources.
This system provides water to 8 ZIP codes across 7 communities.
Average Home Safety Score: D (48/100)
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 |
|---|---|---|---|
| September 1, 2025 | Fecal Coliform | Monitoring | Unresolved |
| August 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| July 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| June 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| May 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| April 1, 2025 | Contaminant 0700 | Monitoring | Resolved |
| April 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| March 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| February 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| January 1, 2025 | Fecal Coliform | Monitoring | Resolved |
| December 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| November 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| October 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| September 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| August 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| July 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| June 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| May 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| April 1, 2024 | Fecal Coliform | Monitoring | Resolved |
| March 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 |
|---|---|---|---|
| Fecal Coliform | Microbiological | 56 | No |
| Chlorite | Disinfection Byproducts | 3 | No |
| Lead and Copper Rule | Treatment Failure | 2 | No |
| Contaminant 1085 | Other Violation | 1 | No |
| Contaminant 2063 | Other Violation | 1 | No |
| Haloacetic Acids (HAA5) | Disinfection Byproducts | 1 | No |
| Total Organic Carbon | Disinfection Byproducts | 1 | No |
| E. coli | Microbiological | 1 | No |
| Contaminant 0700 | Other Violation | 1 | No |
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: 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 PA or modeled from parcel and building-footprint data.
- 17201 — Chambersburg
- 17202 — Chambersburg
- 17222 — Fayetteville
- 17235 — Marion
- 17254 — Scotland
- 17257 — Shippensburg
- 17261 — South Mountain
- 17268 — Waynesboro
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Guilford Water Authority (PA7280038) on EPA.gov.
Frequently Asked Questions
Is Guilford Water Authority water safe to drink?
Guilford Water Authority has only monitoring/reporting violations, which are procedural in nature. The system meets federal health-based standards.
How many people does Guilford Water Authority serve?
Guilford Water Authority serves approximately 28,135 people across 8 ZIP codes in Pennsylvania.
Where does Guilford Water Authority get its water?
The primary water source is groundwater.
Contact Your Water Utility
Public-record contact information for the water utility serving this system. Use these channels to request water quality reports, ask about service, or report issues directly.
Contact information from Guilford Water Authority Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility, does not act as its agent, and does not provide customer support for it. Contact details shown are public-record information from CCR filings. For service issues, contact the utility directly using the information above.
Water Source & Treatment
Where this water originates and how it's treated before reaching your tap.
Source: Guilford Water Authority Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
Overall, our sources have little risk of significant contamination. A summary report of the Assessment is available on the Source Water Assessment Summary Reports eLibrary web page.
Treatment regime
How this utility classifies its treatment process and what each reported treatment chemical does.
Treatment chemicals and what each one does
Chemical names are reported verbatim by the utility. Purpose categories are ZipCheckup annotations based on standard drinking-water treatment practice.
Watershed exposure sources reported
Land-use and natural conditions identified in the utility's source-water assessment as potential contamination sources upstream of treatment.
Treatment classification and chemical list sourced from Guilford Water Authority Consumer Confidence Report.
Treatment intensity is a ZipCheckup-derived classification based on the chemicals and processes the utility reports. Chemicals and contamination sources are taken verbatim from the utility's CCR filing. Routine federal monitoring and contaminant testing shown elsewhere on this page determine whether the water meets safety standards, not the treatment classification.
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 →
Guilford Water Authority prepared a service line inventory that includes the type of materials contained in each service line in our distribution system.
Lead Service Line Replacement Tracker
This water utility's lead service line (LSL) replacement program is tracked from public Consumer Confidence Report filings. Email signup notifies subscribers when the utility files an updated replacement plan or progress milestone.
Guilford Water Authority
ZipCheckup is not affiliated with this water utility. LSL replacement-program data is sourced from public CCR filings published by the utility. Subscription notifications are based on automated parsing of subsequent CCR releases.
Learn more about Lead and Copper Rule replacement requirements →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
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.
Notable events and violations
This section summarizes events the utility chose to disclose in its most recent Consumer Confidence Report, plus any federal compliance violations the utility recorded against itself. Both lists are utility-authored — ZipCheckup does not audit, judge, or reorder them.
Federal compliance violations on record
These entries are taken verbatim from the utility's CCR violations section. EPA defines four broad violation categories: Maximum Contaminant Level (MCL), Treatment Technique (TT), Monitoring & Reporting (M&R), and Public Notification (PN).
-
monitoring · PFOS and PFOA2024 Q1
Incorrect reporting by a lab for PFOS and PFOA samples.
Violations record from Guilford Water Authority Consumer Confidence Report.
ZipCheckup note: items above reflect what the utility published in its most recent CCR. Federal violation records are also tracked separately by the EPA Safe Drinking Water Information System (SDWIS) — the SDWIS record is the authoritative federal source for any specific regulatory action.
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
Guilford Water Authority (EPA ID: PA7280038) — request the latest Consumer Confidence Report or ask about specific contaminants.