State guide
South Carolina
South Carolina’s drinking-water program says systems subject to the lead-rule improvements must keep a public service-line material inventory for each home or building, but residents generally need to get inventory details from their water provider rather than a statewide map. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water))
Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.
- State lead service line page
- Official page →
Official resources in South Carolina
State drinking-water page explaining lead risks, regulatory requirements, and that affected systems hold public service-line inventories. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water))
Official project page for Charleston Water System’s financed lead-service-line replacement work in the North Charleston and Charleston peninsula area. ([charlestonwater.com](https://www.charlestonwater.com/583/Drinking-Water-State-Revolving-Fund-Lead))
Address-based inventory lookup for Charleston Water System customers to see lead, non-lead, or unknown service-line status. ([charlestonwater.com](https://www.charlestonwater.com/564/Lead-Service-Line-Inventory?utm_source=openai))
Owner authorization form describing what Charleston Water will do and what the homeowner receives at no charge. ([charlestonwater.com](https://www.charlestonwater.com/FormCenter/Lead-17/Lead-Service-Line-Replacement-81))
Key facts for South Carolina
- SCDES says systems with lead, galvanized requiring replacement, or unknown service lines must notify affected customers annually by July 1. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water?utm_source=openai))
- SCDES says all water systems subject to LCRI hold a public service-line material inventory for each home or building in the distribution system. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water?utm_source=openai))
- SCDES says baseline inventories and service line replacement plans are due November 1, 2027. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water?utm_source=openai))
- Charleston Water System says its SRF project will permanently remove 1,070 lead service lines in the North Charleston and Charleston peninsula area. ([charlestonwater.com](https://www.charlestonwater.com/583/Drinking-Water-State-Revolving-Fund-Lead))
- Charleston Water System says it will replace an eligible lead service line at no charge, describing at least $7,500 in average cost savings to the owner. ([charlestonwater.com](https://www.charlestonwater.com/FormCenter/Lead-17/Lead-Service-Line-Replacement-81))
- Charleston Water System says replacement includes permits, line replacement, post-replacement flushing guidance, testing, a lead-safe filter pitcher for up to six months, and site restoration. ([charlestonwater.com](https://www.charlestonwater.com/FormCenter/Lead-17/Lead-Service-Line-Replacement-81))
Utility help for homeowners in South Carolina
| Utility | city | program | Details |
|---|---|---|---|
| Charleston Water System | Charleston / North Charleston | SC DHEC/SC RIA State Revolving Fund Lead Service Line Replacement Project | Charleston Water says it will replace eligible lead service lines within its service area at no charge; the form says this is at least $7,500 in average cost savings and includes testing, a filter pitcher for up to six months, and restoration. ([charlestonwater.com](https://www.charlestonwater.com/FormCenter/Lead-17/Lead-Service-Line-Replacement-81)) |
What to do next
- Ask your water provider for its public service-line inventory if you cannot find a statewide map for your address. ([des.sc.gov](https://www.des.sc.gov/programs/bureau-water/drinking-water/lead-drinking-water?utm_source=openai))
- If you are a Charleston Water customer and were contacted about a likely lead or galvanized line, use the inventory page and then submit the replacement consent form quickly. ([charlestonwater.com](https://www.charlestonwater.com/564/Lead-Service-Line-Inventory?utm_source=openai))
- If your line is replaced, keep the utility’s flushing instructions and use the provided filter for the period specified by the utility. ([charlestonwater.com](https://www.charlestonwater.com/FormCenter/Lead-17/Lead-Service-Line-Replacement-81))
Helpful guides
- Who pays to replace the private side of a lead service line?
- Lead service line replacement grants, reimbursements and loans
- How to tell if your water service line is lead
- The Lead and Copper Rule Improvements: what homeowners need to know
Lead line cost-share estimator →