Community Water System · PWS SC0750013
Harbor Island (Sc0750013)
Operator location Kiawah Island, South Carolina - 50% of 52 violations are health-based (upper-third health share (> 23%)); surface water source; 1,039 served per SDWIS.
- 1,039
- People served (this PWS)
- 52
- EPA violations (this PWS)
- 26
- Health-based (this PWS)
- Untested
- UCMR5 (this PWS)
Harbor Island (Sc0750013) standing, mid SDWIS violation third
50% of 52 recorded violations are health-based - upper-third health share (> 23%). Corpus terciles use 29,740 systems serving 500+ (the sitemap cohort). Health-based share 50% is upper-third health share (> 23%). Population rank #19,093 of 29,740 among systems serving 500+.
The verdict
Harbor Island (Sc0750013) lands in the middle third by violation volume (52), large enough for peer comparisons without matching the fleet's heaviest ledgers. Population served is mid-pack at 1,039 (mid served population (≤ 3,309)). Health-based share is 50% - most of this ledger is MCL or treatment-technique exceedance. No UCMR5 PFAS test appears for this system in this extract.
- #19,093 of 29,740
- Population · /systems
- #246 of 314
- Population · SC
- 52
- Total EPA violations on record
- 50%
- 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
- 470
- County
- Beaufort
- School/Daycare
- No
- MCL Violations
- 22
- Monitoring Violations
- 22
- Treatment Tech Violations
- 4
Violation History
Contaminant violations recorded by EPA.
| Contaminant | Category | Count | Latest |
|---|---|---|---|
| Coliform (TCR) | MCL | 22 | 2012 |
| Stage 2 Disinfectants and Disinfection Byproducts Rule | MR | 10 | 2009 |
| Lead and Copper Rule | MR | 4 | 1999 |
| Lead and Copper Rule | TT | 4 | 2005 |
| TTHM | MR | 4 | 2016 |
| Coliform (TCR) | MR | 4 | 2010 |
| Consumer Confidence Rule | Other | 3 | 2007 |
Violation Count vs. the National Corpus
Harbor Island (Sc0750013) has 52 recorded EPA violations, 57% of the 29,740 public water systems serving 500+ people nationwide carry fewer, and 42% carry more. 50% of this system's own violations are health-based (26 of 52), and it ranks #19,093 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)
52 Around the middle fewer violations than 42% 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 Harbor Island (Sc0750013)
26 health-based rows in the tables above map to MCL or treatment-technique exceedances, verify each contaminant code on the federal SDWIS report for SC0750013.
Sources: EPA SDWIS
Nationwide peers
52 violations · 1,039 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.
Cross-state systems near this population served
Nearest cross-state systems by EPA SDWIS population_served (same 500+ sitemap gate).
What to do with Harbor Island
Use this system's EPA-reported record as a starting filter, not a final verdict.
- See how every tracked system in South Carolina compares on the same EPA violation measures. South 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.