The Grand Strand Water & Sewer Authority serves much of the county, drawing from the Waccamaw River, a surface water source prone to disinfection byproduct formation. Well owners across rural Horry County, from Aynor and Loris to Green Sea and Bucksport, face iron, sulfur, and agricultural contamination concerns. ClearFlow's local technicians provide free in-home testing to every neighborhood in Horry County and across the Grand Strand, from Little River and Calabash, NC down to Georgetown and Pawleys Island, SC.
- Free in-home test, no obligation to purchase
- On-site testing of your water
- Written report of your results
- Trained local specialists
Horry County Water Quality Summary
- Water Source
- Pee Dee and Waccamaw rivers, via Bull Creek and the Intracoastal Waterway (GSWSA)
- Primary Concerns
- TTHMs, HAAs, PFAS, Hardness
- Water Hardness
- Soft on city water (about 54 mg/L, roughly 3 GPG); wells vary
- Utility
- Grand Strand Water & Sewer Authority
Your water in Horry County
- Water utility
- Grand Strand Water & Sewer Authority (GSWSA, over 96,000 customers) plus several city systems
- Source
- Two GSWSA plants: Bull Creek (an arm of the Great Pee Dee) and the Intracoastal Waterway
- Disinfectant
- Chloramine, with free chlorine each March in western Horry County
- Hardness
- Not published by the utility. Our free in-home test measures it at your tap.
- Latest report
- GSWSA 2025 Water Quality Report (Bull Creek)
- Rural water lines. GSWSA says its Rural Water Program has brought public water service to over 3,000 homes in rural Horry County. (GSWSA treatment plants)
- March chlorine switch. Each March GSWSA swaps chloramine for free chlorine west of the Waccamaw River and in Little River, Conway, Loris, Aynor, Galivants Ferry and Green Sea while it flushes lines. (GSWSA flushing notice, Jan 26, 2026)
- PFAS upgrades on the way. In June 2026 GSWSA sought builders for Phase 1 PFAS treatment upgrades at its Bull Creek plant. (SC Business Opportunities: Bull Creek WTP PFAS upgrades, June 3, 2026)
Where we test
Also serving the Upstate: Greenville and Spartanburg
Cities & Communities We Serve in Horry County
- Myrtle Beach
- Conway
- North Myrtle Beach
- Surfside Beach
- Loris
- Socastee
- Carolina Forest
- Little River
- Aynor
- Garden City
- Forestbrook
- Red Hill
- Longs
- Green Sea
- Bucksport
- Myrtle Beach
- North Myrtle Beach
- Little River
- Surfside Beach
- Garden City
- Murrells Inlet
- Conway
- Aynor
- Loris
- Marion
- Mullins
- Dillon
- Pawleys Island
- Georgetown
- Calabash, NC
- Sunset Beach, NC
- Ocean Isle Beach, NC
- Shallotte, NC
Related guides
- PFAS in Myrtle Beach Water: Grand Strand Sources and Solutions
- Water Softener Cost in Myrtle Beach, SC
- Well Water Testing SC & NC
Frequently asked questions
What water utility serves Horry County?
Most of Horry County is served by the Grand Strand Water & Sewer Authority (GSWSA). Some areas use private wells or smaller municipal systems.
Should I test my well water in Horry County?
Iron, manganese, sulfur, and agricultural nitrates are commonly reported concerns for wells in this area, and private wells are not covered by federal drinking water regulations. A free in-home test from ClearFlow shows what's in your well.
How do I get a free water test in Horry County?
Call (843) 742-1196 or book online. ClearFlow serves all of Horry County.
Does ClearFlow serve areas outside Myrtle Beach in Horry County?
Yes, we serve every community in Horry County, including Conway, Aynor, Loris, Carolina Forest, Socastee, Longs, Green Sea, and Bucksport, plus the rest of the Grand Strand and beyond.
How quickly can I get a water test scheduled in Horry County?
Scheduling depends on technician availability in your area. Contact us at (843) 742-1196 to find the next available time.
Is there a cost for the Horry County in-home water test?
No, the in-home water test is free with no obligation to purchase anything. You'll receive a written report explaining your results.