Community Water System · PWS MS0110005
Town of Port Gibson
Operator location Port Gibson, Mississippi - upper-third violation load (> 74 violations) with 338 EPA violations; groundwater source; 3,047 served (PWS-level, not municipal population).
- 3,047
- People served (this PWS)
- 338
- EPA violations (this PWS)
- 29
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Town of Port Gibson standing, high SDWIS violation third
338 EPA SDWIS violations on record - upper-third violation load (> 74 violations). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 9% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected. Population rank #10,491 of 29,740 among systems serving 500+.
The verdict
Town of Port Gibson sits in the upper third of the sitemap cohort by violation count (338), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is mid-pack at 3,047 (mid served population (≤ 3,309)). Health-based share is 9% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- #10,491 of 29,740
- Population · /systems
- #222 of 837
- Population · MS
- 338
- Total EPA violations on record
- 9%
- Health-based (MCL / treatment failure)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Local
- Connections
- 1,154
- County
- Claiborne
- School/Daycare
- No
- MCL Violations
- 17
- Monitoring Violations
- 288
- Treatment Tech Violations
- 12
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MR | 82 | 2012 |
| Radium-226 | MR | 58 | 2012 |
| Radium-228 | MR | 58 | 2012 |
| Gross Alpha, Excl. Radon and U | MR | 28 | 2008 |
| Combined Radium (-226 and -228) | MR | 28 | 2008 |
| Coliform (TCR) | MCL | 17 | 2015 |
| Chlorine | MR | 13 | 2021 |
| Groundwater Rule | TT | 12 | 2013 |
| Coliform (TCR) | MR | 7 | 2012 |
| Revised Total Coliform Rule | MON | 6 | 2021 |
| Public Notice | Other | 5 | 2012 |
| Revised Total Coliform Rule | RPT | 4 | 2018 |
| Consumer Confidence Rule | Other | 3 | 2012 |
| Total Haloacetic Acids (HAA5) | MR | 3 | 2024 |
| TTHM | MR | 3 | 2024 |
| Lead and Copper Rule | MR | 2 | 2021 |
| Lead and Copper Rule | Other | 1 | 2006 |
| Coliform (TCR) | Other | 1 | 2002 |
Violation Count vs. the National Corpus
Town of Port Gibson has 338 recorded EPA violations, 92% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 8% carry more. 9% of this system's own violations are health-based (29 of 338), and it ranks #10,491 of 29,740 by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
338 Higher than most more violations than 92% of 29,740 water systems
the national water-system corpus, bucketed by value
Each bar is a band; taller bars hold more water systems. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count and share, and where it sits relative to this entry.
Source EPA SDWIS · 2026-05-15
PFAS Testing Results (UCMR5)
Results from EPA's Fifth Unregulated Contaminant Monitoring Rule. 0 of 58 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| HFPO-DA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| ADONA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 5/15/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 5/15/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 5/15/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| NFDHA | 5/15/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFPeS | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFUnA | 5/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 6:2 FTS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 5/15/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFEESA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFOA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFNA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 5/15/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBA | 5/15/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 5/15/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 11/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHpA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFTA | 11/12/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 11/12/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 11/12/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 11/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 11/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOA | 11/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFDA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 11/12/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| NMeFOSAA | 11/12/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFPeS | 11/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFEESA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 11/12/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 11/12/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
SDWIS compliance record for Town of Port Gibson
338 violations on record for MS0110005; use EPA SDWIS to confirm return-to-compliance dates and monitoring categories.
Sources: EPA SDWIS
Nationwide peers
338 violations · 3,047 served: nearest cross-state SDWIS matches.
Cross-state systems with comparable violation load
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Town of Port Gibson
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in Mississippi compares on the same EPA violation measures. Mississippi systems
- Check whether PFAS was detected at this system under UCMR5 testing. PFAS guide
- Find and compare another public water system by name or PWSID. Search systems
EPA SDWIS and UCMR5 figures are informational only, not a substitute for a certified lab test of your own tap water.