South Island Public Service District (sc0720001)
EPA ID: SC0720001 · 18,299 people served · 4 ZIP codes
Zero EPA violations over five years — South Island Public Service District (sc0720001) has kept tap water compliance clean for its full service population of 18,299.
Data: EPA SDWIS Last verified: 2026-04-02
Compliance Trajectory
Stable · Risk tier: High · 95% chance of violation in next 12 months
Violations went from 5 (2023) to 8 (2024). Violation counts have remained relatively steady.
Service Area Map
Coverage area for South Island Public Service District (sc0720001) Source: EPA SDWIS service area boundaries.
Service area boundary
Service Area Demographics
The South Island Public Service District (sc0720001) serves a community with a median household income of $99,776 and an estimated 40,352 residents across its service area. Approximately 43% of housing stock was built before 1986, which increases the likelihood of lead service lines and older plumbing.
Environmental Justice Note: 33% of the population in this service area is classified as disadvantaged under EPA's EJScreen criteria. Communities with higher disadvantaged populations often face disproportionate environmental and health burdens, including aging water infrastructure and limited resources for remediation.
💧 Where Does Your Water Come From?
South Island Public Service District (sc0720001)'s water is pumped from underground aquifers. Groundwater is naturally filtered through rock and soil, but it can be vulnerable to PFAS contamination, nitrates from agriculture, and industrial chemicals that seep into the water table.
About 1% of homes in Beaufort County, South Carolina rely on private wells rather than public water systems. Private well owners are responsible for their own water testing and treatment.
Superfund Proximity Note: This service area ranks in the 60th percentile nationally for proximity to Superfund (NPL) sites. Groundwater sources near contaminated sites may face elevated risk from industrial chemicals.
Infrastructure Risk
PFAS Detected in Service Area
PFAS ("forever chemicals") have been detected in water serving this system's area. 8 detections recorded. 4 exceed federal EPA limits (4 ppt for PFOA/PFOS). 4 exceed state limits.
Comparable Water Systems
Similar-sized systems in South Carolina
Estimated Remediation Costs
Average estimated costs across ZIP codes served by this system
Based on national averages for common remediation projects. Actual costs vary by property. Only issues flagged by EPA, FEMA, or state data for each ZIP code are included.
System Overview
South Island Public Service District (sc0720001) (EPA ID: SC0720001) is a community water system in South Carolina that serves approximately 18,299 people from groundwater sources.
This system provides water to 4 ZIP codes across 1 community.
Violation History
Lead & Copper
No Lead and Copper Rule sampling data available for this water system.
Need help with your water quality?
Typical cost: Water test: typically $20–$50 (DIY kit) · Professional inspection: $150–$400
Find the Right Water FilterFree tip: Let cold water run for 2 minutes before drinking — this helps flush lead from your pipes.
ZIP Codes Served
Coverage: 1 ZIP code confirmed via EPA Community Water System Service Area Boundaries v3 plus 3 additional ZIPs inferred from SDWIS registry data. The EPA-confirmed set is the most reliable; SDWIS-inferred entries may be narrower than the real deployment area.
- 29925 — Hilton Head Island
- 29926 — Hilton Head Island
- 29928 — Hilton Head Island
- 29938 — Hilton Head Island
Data Sources
This report uses public data from the EPA Safe Drinking Water Information System (SDWIS). View the full compliance record for South Island Public Service District (sc0720001) (SC0720001) on EPA.gov.
Frequently Asked Questions
Is South Island Public Service District (sc0720001) water safe to drink?
Based on EPA records, South Island Public Service District (sc0720001) has no recorded violations in the past 5 years — a positive indicator of water quality management.
How many people does South Island Public Service District (sc0720001) serve?
South Island Public Service District (sc0720001) serves approximately 18,299 people across 4 ZIP codes in South Carolina.
Where does South Island Public Service District (sc0720001) get its water?
The primary water source is groundwater.
Federal UCMR5 PFAS Monitoring: Tested Clean
This water system was tested under the federal EPA Unregulated Contaminant Monitoring Rule (UCMR5). No PFAS compounds were detected.
Current MCL reflects the lowest state-enforceable limit (NYS 10 ppt for PFOA/PFOS, effective August 2020). The federal final MCL of 4 ppt for PFOA/PFOS (EPA April 2024 rule) is not enforceable until April 2029. Detections above 4 ppt but below 10 ppt are below current MCL but above the future federal limit.
Source: U.S. EPA UCMR5 (Unregulated Contaminant Monitoring Rule, 5th cycle) — per-system federal sampling, 2023–2025. EPA UCMR5 monitoring program →
Lead Service Line Inventory
Service line breakdown reported under the federal Lead and Copper Rule Improvements (LCRI) inventory requirement:
Federal LCRI rule (effective October 2024) requires every public water system to inventory its service lines and complete lead-line replacement within 10 years.
Source: EPA SDWIS Federal Service Line Inventory (Phase 2) · Submitted 2026
ZipCheckup is not affiliated with the utility or state agency. Inventory figures render verbatim from the public LCRI submission cited above; ZipCheckup does not perform inspections or replacements.