PFAS questions are common here, and homes built before 1986 can have lead solder in their plumbing. Coastal communities face saltwater intrusion issues.
- Free in-home test, no obligation to purchase
- On-site testing of your water
- Written report of your results
- Trained ClearFlow specialists
Charleston County Water Quality Summary
- Water Source
- Bushy Park Reservoir (about 90%) and Edisto River (about 10%) (Charleston Water System)
- Primary Concerns
- PFAS, Lead, TTHMs, Saltwater Intrusion
- Water Hardness
- Moderately soft (58.4 ppm, about 3.4 GPG, Charleston Water System)
- Utility
- Charleston Water System
Your water in Charleston County
- Water utility
- Several, including Charleston Water System (about 500,000 people, tri-county) and Mount Pleasant Waterworks
- Source
- Mostly Bushy Park Reservoir and Edisto River water; Mount Pleasant adds deep aquifer wells
- Disinfectant
- Chloramine (Charleston Water System and Mount Pleasant Waterworks)
- Hardness
- Charleston Water System: 54 ppm (3.16 grains per gallon), 2025 average
- A river-and-reservoir blend. Charleston Water System blends its two sources, typically about 90% Bushy Park Reservoir and 10% Edisto River. (Charleston Water System FAQs)
- Mount Pleasant is different. Mount Pleasant Waterworks adds reverse-osmosis water from 2,000-foot wells in the Charleston Aquifer. You may get well water, CWS water or a blend. (Mount Pleasant Waterworks 2025 Annual Drinking Water Report)
- No lead lines in Mount Pleasant. Mount Pleasant Waterworks has determined that there are no lead service lines in its system. (Mount Pleasant Waterworks 2025 Annual Drinking Water Report)
Where we test
Also serving the Upstate: Greenville and Spartanburg
Cities & Communities We Serve in Charleston County
- Charleston
- North Charleston
- Mount Pleasant
- Summerville
- Goose Creek
- Hanahan
- James Island
- Johns Island
Dedicated pages: Charleston SC Water Testing
Related guides
- Water Filtration & Testing in Charleston
- Charleston, SC Water Quality Report
- Free Water Testing in Charleston, SC
- PFAS Contamination in Charleston, SC: What Joint Base Charleston Means for Your Water
- Water Softener Cost in Myrtle Beach, SC
Frequently asked questions
Is Charleston County water safe?
Charleston Water System meets federal standards, but PFAS, lead, and disinfection byproducts remain documented concerns. ClearFlow provides free in-home testing across the county.
Does Charleston County have PFAS in the water?
PFAS are regulated nationally, and utilities publish their results each year. For your own tap, only a certified lab test can tell you, and ClearFlow can arrange one.
How do I get a free water test in Charleston County?
Call (843) 742-1196 or book online. ClearFlow serves all of Charleston County.