Community Water System · PWS NC7071018
Castle Bay S/D
Operator location Cary, North Carolina - 44% of 196 violations are health-based (upper-third health share (> 23%)); groundwater source; 777 served per SDWIS.
- 777
- People served (this PWS)
- 196
- EPA violations (this PWS)
- 87
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Castle Bay S/D standing, high SDWIS violation third
44% of 196 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 44% is upper-third health share (> 23%). Population rank #22,993 of 29,740 among systems serving 500+.
The verdict
Castle Bay S/D sits in the upper third of the sitemap cohort by violation count (196), so the tables below sample a dense compliance trail rather than a near-clean ledger. Population served is smaller (777; smaller served population (≤ 999)), so each violation row represents a compact service footprint. Health-based share is 44% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #22,993 of 29,740
- Population · /systems
- #545 of 713
- Population · NC
- 196
- Total EPA violations on record
- 44%
- 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
- Private
- Connections
- 306
- County
- Pender
- School/Daycare
- No
- MCL Violations
- 86
- Monitoring Violations
- 85
- Treatment Tech Violations
- 1
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Total Haloacetic Acids (HAA5) | MCL | 59 | 2013 |
| TTHM | MCL | 27 | 2013 |
| Public Notice | Other | 15 | 2007 |
| Gross Alpha, Excl. Radon and U | MR | 13 | 2004 |
| Combined Radium (-226 and -228) | MR | 10 | 2004 |
| Combined Uranium | MR | 10 | 2004 |
| TTHM | MR | 9 | 2022 |
| Total Haloacetic Acids (HAA5) | MR | 8 | 2022 |
| Coliform (TCR) | MR | 6 | 2004 |
| Revised Total Coliform Rule | RPT | 5 | 2024 |
| Tritium | MR | 4 | 2004 |
| Radium-226 | MR | 4 | 2004 |
| Radium-228 | MR | 4 | 2004 |
| 53-IODINE-131 | MR | 4 | 2004 |
| 38-STRONTIUM-90 | MR | 4 | 2004 |
| Gross Beta Particle Activity | MR | 3 | 2004 |
| Chlorine | MR | 3 | 2004 |
| Lead and Copper Rule | MR | 3 | 2004 |
| Consumer Confidence Rule | Other | 2 | 2005 |
| Lead and Copper Rule | TT | 1 | 2006 |
Violation Count vs. the National Corpus
Castle Bay S/D has 196 recorded EPA violations, 85% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 15% carry more. 44% of this system's own violations are health-based (87 of 196), and it ranks #22,993 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)
196 Higher than most more violations than 85% 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
Health-based violations on Castle Bay S/D
87 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for NC7071018.
Sources: EPA SDWIS · North Carolina DEQ, Public Water Supply Section
Nationwide peers
196 violations · 777 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 with smaller service footprints
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Castle Bay 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.