Community Water System · PWS MS0070007
Duncan Hill Water Supply
Operator location Calhoun City, Mississippi - smaller served population (≤ 999) at 370 people served; 530 SDWIS violations on record from groundwater sources.
- 370
- People served (this PWS)
- 530
- EPA violations (this PWS)
- 7
- Health-based (this PWS)
- No PFAS
- UCMR5 (this PWS)
Duncan Hill Water Supply standing, high SDWIS violation third
370 people served (SDWIS) - smaller served population (≤ 999). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 1% is middle-third health share (≤ 23%). UCMR5: UCMR5 tested, none detected.
The verdict
Duncan Hill Water Supply sits in the upper third of the sitemap cohort by violation count (530), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (370; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 1% (middle-third health share (≤ 23%)). UCMR5 tested this system and reported no PFAS above the minimum reporting level.
- 530
- Total EPA violations on record
- 1%
- Health-based (MCL / treatment failure)
- 370
- People served by this PWS (SDWIS)
- 0
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
System Details
- System Type
- Community
- Owner Type
- Public/Private
- Connections
- 147
- County
- Calhoun
- School/Daycare
- No
- MCL Violations
- 7
- Monitoring Violations
- 509
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Uranium | MR | 160 | 2011 |
| Radium-228 | MR | 116 | 2012 |
| Radium-226 | MR | 116 | 2012 |
| Combined Radium (-226 and -228) | MR | 56 | 2008 |
| Gross Alpha, Excl. Radon and U | MR | 56 | 2008 |
| Coliform (TCR) | MCL | 6 | 1996 |
| Coliform (TCR) | MR | 5 | 1994 |
| Combined Radium (-226 and -228) | MCL | 1 | 1980 |
| Public Notice | Other | 1 | 2008 |
Violation Count vs. the National Corpus
Duncan Hill Water Supply has 530 recorded EPA violations, 96% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 4% carry more. 1% of this system's own violations are health-based (7 of 530), and it ranks unranked by population served among that same cohort.
EPA violations vs. the national water-system corpus
Public water systems serving 500+ people (EPA SDWIS)
530 Higher than most more violations than 96% 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 62 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFTrDA | 8/8/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 8/8/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| NEtFOSAA | 8/8/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 8/8/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 6/12/2023 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 6/12/2023 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 6/12/2023 | <5.00 ppt | 5.00 ppt | Not Detected |
| NMeFOSAA | 6/12/2023 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTA | 3/29/2024 | <8.00 ppt | 8.00 ppt | Not Detected |
| NMeFOSAA | 3/29/2024 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 3/29/2024 | <7.00 ppt | 7.00 ppt | Not Detected |
| NEtFOSAA | 3/29/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFDA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFEESA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| NFDHA | 2/19/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFUnA | 2/19/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 9Cl-PF3ONS | 2/19/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFOA | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFBS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHxS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 4:2 FTS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| 9Cl-PF3ONS | 2/19/2024 | <2.00 ppt | 2.00 ppt | Not Detected |
| PFHpS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| NFDHA | 2/19/2024 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 2/19/2024 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 2/19/2024 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBS | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
| ADONA | 2/19/2024 | <3.00 ppt | 3.00 ppt | Not Detected |
Population served record for Duncan Hill Water Supply
EPA SDWIS lists 370 people served and 147 connections for this PWS, confirm the service-area footprint on the federal report before comparing to municipal census totals.
Sources: EPA SDWIS
Nationwide peers
530 violations · 370 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.
What to do with Duncan Hill Water Supply
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.