C46/100
CHARLESTON WATER SYSTEM (SC1010001) — Water Quality Report 2026
Serving 327,422 people · South Carolina
Water Source
Surface Water
County
—
System ID
SC1010001
Violations
15
Contaminant Test Results
3 contaminants above EPA health goals
| Contaminant | Detected | Limit (MCL) | Status |
|---|---|---|---|
PFOS | 0.006 µg/L | 0.004 µg/L | Over Limit |
PFOA | 0.004 µg/L | 0.004 µg/L | Over Limit |
Lead (90th percentile) | 0.004 mg/L | 0.015 mg/L | Above Goal |
EPA Violation History
No violations in the past 5 years
Full EPA compliance since 2004.
Understanding violation severity
Tier 1Urgent health risk. Utility must notify all customers within 24 hours.Tier 2Important health or treatment issue. Customers notified within 30 days.Tier 3Administrative or monitoring issue. Reported in the annual water quality report.
Source: EPA Safe Drinking Water Information System (SDWIS) · Updated quarterly
Frequently Asked Questions About CHARLESTON WATER SYSTEM (SC1010001)
Is CHARLESTON WATER SYSTEM (SC1010001) water safe to drink?
CHARLESTON WATER SYSTEM (SC1010001) water receives a grade of C (46/100), which is considered fair. 2 contaminant(s) exceed EPA legal limits and 15 violation(s) are on record. Customers may want to consider using a water filter.
What contaminants has CHARLESTON WATER SYSTEM (SC1010001) detected?
76 contaminants were tested in CHARLESTON WATER SYSTEM (SC1010001)'s water. Notable contaminants include PFOS, PFOA, Lead (90th percentile). 2 exceed EPA legal limits (MCLs). 3 exceed EPA health goals (MCLGs).
Does CHARLESTON WATER SYSTEM (SC1010001) have any EPA violations?
Yes, CHARLESTON WATER SYSTEM (SC1010001) has 15 EPA violation(s) on record, with the most recent in 2004. Violation types include MR, MCL. 5 are health-based violations.
How many people does CHARLESTON WATER SYSTEM (SC1010001) serve?
CHARLESTON WATER SYSTEM (SC1010001) serves approximately 327,422 people, South Carolina. The system provides water to 1 community: Charleston.
What type of water does CHARLESTON WATER SYSTEM (SC1010001) provide?
CHARLESTON WATER SYSTEM (SC1010001) sources its water from surface water. Surface water comes from rivers, lakes, or reservoirs and typically requires more extensive treatment. The utility's system ID is SC1010001.
How does CHARLESTON WATER SYSTEM (SC1010001) compare to other utilities in South Carolina?
CHARLESTON WATER SYSTEM (SC1010001) scores 46/100 with a grade of C (fair). This score indicates room for improvement compared to other utilities. Visit our South Carolina state page for a full comparison of water systems.