Town of Port Gibson
EPA ID: MS0110005 · 3,047 people served · 2 ZIP codes
Compliance tracking for Town of Port Gibson shows 10 pending violations logged in the EPA system — the supplier delivers water to approximately 3,047 residents while those findings remain open.
Data: EPA SDWIS Last verified: 2026-04-02
Service Area Map
Coverage area for Town of Port Gibson Source: EPA SDWIS service area boundaries.
Service area boundary — Grade B
Service Area Demographics
The Town of Port Gibson serves a community with a median household income of $33,192 and an estimated 6,830 residents across its service area. Approximately 59% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 100% 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?
Town of Port Gibson'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 Claiborne County, Mississippi rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Infrastructure Risk
Detected Contaminants
How Town of Port Gibson compares to EPA limits
What This Means For You
Total Trihalomethanes (TTHM) at 4 mg/L exceeds the EPA maximum of 0.08 mg/L. Bladder & rectal cancer risk; reproductive concerns. Consider granular activated carbon (GAC) filtration.
Selenium at 1 mg/L exceeds the EPA maximum of 0.05 mg/L. Hair & nail loss, nerve damage, liver & kidney damage. Consider reverse osmosis filtration.
Revised Total Coliform Rule at 8 presence exceeds the EPA maximum of presence.
Lead and Copper Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Consumer Confidence Report Rule at 7 mg/L exceeds the EPA maximum of mg/L.
Total Trihalomethanes (TTHM) 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
Town of Port Gibson (EPA ID: MS0110005) is a community water system in Mississippi that serves approximately 3,047 people from groundwater sources.
This system provides water to 2 ZIP codes across 2 communities.
Average Home Safety Score: B (83/100)
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 |
|---|---|---|---|
| October 28, 2025 | Lead and Copper Rule | Monitoring | Resolved |
| April 1, 2025 | Revised Total Coliform Rule | Monitoring | Unresolved |
| April 1, 2025 | Consumer Confidence Report Rule | Monitoring | Unresolved |
| March 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| March 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| January 1, 2025 | Stage 1 DBP Rule | Monitoring | Resolved |
| January 1, 2025 | Consumer Confidence Report Rule | Monitoring | Resolved |
| January 1, 2025 | Revised Total Coliform Rule | Monitoring | Resolved |
| December 19, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Health-based | Resolved |
| October 17, 2024 | Stage 2 DBP Rule | Monitoring | Resolved |
| October 12, 2024 | Consumer Confidence Report Rule | Health-based | Resolved |
| October 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| July 1, 2024 | Surface Water Treatment Rule | Monitoring | Resolved |
| January 18, 2024 | Lead and Copper Rule | Monitoring | Resolved |
| January 1, 2024 | Total Trihalomethanes (TTHM) | Monitoring | Unresolved |
| January 1, 2024 | Stage 1 DBP Rule | Monitoring | Resolved |
| December 1, 2023 | Unknown | Monitoring | Unresolved |
Contaminants Detected
The following contaminants have been flagged in EPA records for this water system:
| Contaminant | Category | Violations | Health-Based |
|---|---|---|---|
| Revised Total Coliform Rule | Microbiological | 8 | No |
| Lead and Copper Rule | Treatment Failure | 7 | No |
| Consumer Confidence Report Rule | Reporting Failure | 7 | Yes |
| Total Trihalomethanes (TTHM) | Disinfection Byproducts | 4 | No |
| Stage 1 DBP Rule | Treatment Failure | 3 | No |
| Surface Water Treatment Rule | Treatment Failure | 3 | No |
| Stage 2 DBP Rule | Treatment Failure | 2 | Yes |
| Selenium | Inorganic | 1 | No |
| Contaminant 1045 | Other Violation | 1 | No |
Lead & Copper
EPA Lead and Copper Rule sampling data for ZIP codes served by this system:
| ZIP Code | Lead Level | Exceeds Limit | Sample Date |
|---|---|---|---|
| 39150 | 0.0043 mg/L | No | N/A |
Radon Risk in Service Area
Dominant radon zone for ZIP codes served by this system: Zone 3 (Low Risk)
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 MS or modeled from parcel and building-footprint data.
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for Town of Port Gibson (MS0110005) on EPA.gov.
Frequently Asked Questions
Is Town of Port Gibson water safe to drink?
Town of Port Gibson 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 Town of Port Gibson serve?
Town of Port Gibson serves approximately 3,047 people across 2 ZIP codes in Mississippi.
Where does Town of Port Gibson 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 Town of Port Gibson 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: Town of Port Gibson Consumer Confidence Report.
ZipCheckup is not affiliated with this water utility. Treatment and source data are sourced from the utility's published CCR filings.
The source water assessment has been completed for our public water system to determine the overall susceptibility of its drinking water supply to identify potential sources of contamination. A report containing detail information on how the susceptibility determination were made has been furnished to our public water system and is available for your viewing upon request. The wells for the Town of Port Gibson have received moderate to higher ranking in terms of susceptibility to contamination.
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 Town of Port Gibson 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 →
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
Town of Port Gibson (EPA ID: MS0110005) — request the latest Consumer Confidence Report or ask about specific contaminants.