Community Water System · PWS NC0351185
Southgate S/D
Operator location Cary, North Carolina - 73% of 56 violations are health-based (upper-third health share (> 23%)); surface water source; 160 served per SDWIS.
- 160
- People served (this PWS)
- 56
- EPA violations (this PWS)
- 41
- Health-based (this PWS)
- 6 PFAS
- UCMR5 (this PWS)
Southgate S/D standing, mid SDWIS violation third
73% of 56 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 73% is upper-third health share (> 23%). UCMR5: upper-third PFAS panel (> 4 compounds).
The verdict
Southgate S/D lands in the middle third by violation volume (56), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is smaller (160; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 73% - most of this ledger is MCL or treatment-technique exceedance. UCMR5 detected 6 PFAS compounds (upper-third PFAS panel (> 4 compounds)).
- 56
- Total EPA violations on record
- 73%
- Health-based (MCL / treatment failure)
- 160
- People served by this PWS (SDWIS)
- 6
- PFAS compounds detected (UCMR5)
Population ordinals match the sitemap cohort (systems serving 500+, population_served DESC). See methodology · corpus placement.
6 PFAS "forever chemicals" detected in testing under EPA's UCMR5 monitoring program.
System Details
- System Type
- Community
- Owner Type
- Private
- Connections
- 63
- County
- Johnston
- School/Daycare
- No
- MCL Violations
- 41
- Monitoring Violations
- 0
- Treatment Tech Violations
- 0
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Combined Radium (-226 and -228) | MCL | 41 | 2008 |
| Public Notice | Other | 7 | 2009 |
| Revised Total Coliform Rule | RPT | 5 | 2023 |
| Consumer Confidence Rule | Other | 3 | 2002 |
Violation Count vs. the National Corpus
Southgate S/D has 56 recorded EPA violations, 60% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 40% carry more. 73% of this system's own violations are health-based (41 of 56), 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)
56 Around the middle fewer violations than 40% 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. 18 of 87 samples detected PFAS.
| Contaminant | Date | Result | MRL | Status |
|---|---|---|---|---|
| PFNA | 9/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 9Cl-PF3ONS | 9/15/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| ADONA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| HFPO-DA | 9/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 9/15/2025 | 5.70 ppt | 5.00 ppt | Detected |
| 6:2 FTS | 9/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 4:2 FTS | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| 8:2 FTS | 9/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxS | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMPA | 9/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFOS | 9/15/2025 | 7.70 ppt | 4.00 ppt | Detected |
| PFOA | 9/15/2025 | 7.60 ppt | 4.00 ppt | Detected |
| PFDA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDoA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 9/15/2025 | 4.70 ppt | 3.00 ppt | Detected |
| PFUnA | 9/15/2025 | <2.00 ppt | 2.00 ppt | Not Detected |
| 11Cl-PF3OUdS | 9/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| NEtFOSAA | 9/15/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFHxA | 9/15/2025 | 6.80 ppt | 3.00 ppt | Detected |
| PFPeA | 9/15/2025 | 6.80 ppt | 3.00 ppt | Detected |
| NMeFOSAA | 9/15/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| PFTrDA | 9/15/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFTA | 9/15/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFHpS | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| NFDHA | 9/15/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 9/15/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeS | 9/15/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| NEtFOSAA | 6/11/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFTA | 6/11/2025 | <8.00 ppt | 8.00 ppt | Not Detected |
| PFTrDA | 6/11/2025 | <7.00 ppt | 7.00 ppt | Not Detected |
| PFHxA | 6/11/2025 | 4.80 ppt | 3.00 ppt | Detected |
| PFPeS | 6/11/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHpS | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFNA | 6/11/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| PFHxS | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFHpA | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFDA | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFBS | 6/11/2025 | 3.90 ppt | 3.00 ppt | Detected |
| NMeFOSAA | 6/11/2025 | <6.00 ppt | 6.00 ppt | Not Detected |
| NFDHA | 6/11/2025 | <20.00 ppt | 20.00 ppt | Not Detected |
| PFEESA | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFMBA | 6/11/2025 | <3.00 ppt | 3.00 ppt | Not Detected |
| PFPeA | 6/11/2025 | 4.10 ppt | 3.00 ppt | Detected |
| PFMPA | 6/11/2025 | <4.00 ppt | 4.00 ppt | Not Detected |
| 8:2 FTS | 6/11/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| 6:2 FTS | 6/11/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
| PFBA | 6/11/2025 | 5.50 ppt | 5.00 ppt | Detected |
| HFPO-DA | 6/11/2025 | <5.00 ppt | 5.00 ppt | Not Detected |
Health-based violations on Southgate S/D
41 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NC0351185.
Sources: EPA SDWIS · North Carolina DEQ, Public Water Supply Section
Nationwide peers
56 violations · 160 served: nearest cross-state SDWIS matches.
Cross-state systems near this violation count
Nearest cross-state community systems (500+ served) by total SDWIS violations on record.
What to do with Southgate S/D
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in North Carolina compares on the same EPA violation measures. North Carolina 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.