Water system · PWSID SC0720006
HILTON HEAD PSD 1 (0720006)
PWSID
SC0720006
State
South Carolina
City
HILTON HEAD ISLAND
Population served
25,558
Primary source
SWP
Score history
▼ 22 points — the score moved from 100 to 78 on Jun 18, 2026, as newly published EPA data was incorporated.
2 score updates logged since tracking began Jun 18, 2026. Each future EPA re-score adds a point.
PFAS & contaminant readings
Latest detections from EPA’s UCMR5 monitoring (through Jun 2025). Levels in parts per trillion (ppt).
PFOS
Perfluorooctanesulfonic acid
4.8 ppt
limit 4 ppt
PFOA
Perfluorooctanoic acid
4.2 ppt
limit 4 ppt
Lithium
9,060 ppt
limit —
PFBS
3 ppt
limit —
PFPeA
3 ppt
limit —
Violations & enforcement
3
Violations on record
0
Unaddressed
0
Health-based
10
Enforcement actions
From EPA ECHO (SDWIS), most recent enforcement Jun 2011. Official EPA record →
Recent enforcement actions
- State action · SIF Jun 2011
- State action · SIE Jul 2010
- State action · SIA Jul 2010
- State action · SOX Jul 2010
- State action · SIA Aug 2004
- State action · SOX Jan 2004
- EPA/federal action · EOX Feb 1994
- EPA/federal action · EFL Sep 1993
Area water-quality monitoring
Environmental monitoring (rivers, wells, intakes) recorded in this system’s service area in the EPA/USGS Water Quality Portal since 2018 — source/ambient water, not finished tap water. Context for the watershed, not a reading from your tap.
Manganese
1 station · latest Oct 2025
Source: Water Quality Portal (EPA/USGS/state agencies). Values are as-reported and aren’t health thresholds.
This profile is built from EPA public records for system SC0720006 — SDWIS violations and UCMR5 PFAS sampling. The score is system-level and can’t account for your home’s plumbing (older pipes can add lead at the tap). For health decisions, check your exact address, read the utility’s Consumer Confidence Report, and confirm with your provider.