Grand Strand Water Quality: Myrtle Beach, GSWSA, and What Every Local Homeowner Should Know

Where does Myrtle Beach get its drinking water?

Myrtle Beach and most Grand Strand cities receive treated water from GSWSA, which operates the Bull Creek Water Treatment Plant in Conway. Bull Creek draws raw water from the Atlantic Intracoastal Waterway, a tidal surface water body that carries naturally high organic carbon and seasonal variability in temperature and chemistry.

GSWSA blends that treated Intracoastal Waterway water with groundwater from the Black Creek aquifer. The Black Creek aquifer is a deep, confined freshwater formation that underlies much of coastal South Carolina. Blending the two sources lets the authority balance hardness, dilute surface water organics, and manage disinfection chemistry across a sprawling distribution system that covers portions of both Horry and Georgetown Counties.

The blend ratio shifts with seasons. During the tourism peak from June to August, total demand rises substantially and GSWSA increases production, which can shift the balance between surface and groundwater fractions. That seasonal shift affects both hardness readings and disinfection byproduct formation. Customers who notice taste changes in summer are often picking up on that chemistry shift, not a system problem. Always verify current figures in the GSWSA Consumer Confidence Report for the most recent monitoring data.

Georgetown and Pawleys Island residents are served by the Georgetown County Water and Sewer District, which draws entirely from the Black Creek aquifer without a surface water blend. That gives GCWSD water a more stable chemistry profile year round, but it also means higher natural mineral content and the aquifer's characteristic fluoride levels. Our deep dive on Black Creek and Middendorf aquifer fluoride and radium explains the geology behind those readings.

Is Myrtle Beach tap water safe to drink?

GSWSA water meets all Safe Drinking Water Act standards, and the authority submits regular monitoring results to the South Carolina Department of Environmental Services. Safe under federal law and pleasant at the tap are two different things, and understanding both matters for Grand Strand homeowners.

GSWSA disinfects primarily with chloramine, a compound formed by combining chlorine and ammonia. Chloramine is effective at maintaining a residual through long distribution lines, which is useful across a 60-mile service territory. It also forms fewer regulated trihalomethanes than free chlorine. The trade-off is that chloramine is more persistent than free chlorine and has a distinctly pool-like or medicinal taste at the tap, especially on the hot side.

The Intracoastal Waterway source water is naturally high in dissolved organic carbon. When disinfectants react with that organic carbon during treatment and in the distribution system, they form disinfection byproducts: trihalomethanes (TTHMs) and haloacetic acids (HAA5). Levels typically rise during warm months when organic content is highest. GSWSA monitors these compounds and publishes results in the annual CCR. Verify current figures there rather than relying on historical estimates. A whole house catalytic carbon system or a point of use carbon block reduces both chloramine taste and disinfection byproducts at the faucet. Our Myrtle Beach water quality article covers CCR interpretation in more detail.

GSWSA has also published PFAS monitoring data per the 2024 EPA rule, which sets enforceable limits at 4 parts per trillion for PFOA and PFOS. The CCR is the authoritative source for actual current values. Point of use reverse osmosis is the most reliable in-home PFAS reduction option. Our reverse osmosis pillar walks through how RO compares to other PFAS reduction approaches.

What water issues are common in the Grand Strand?

For city water customers on GSWSA, the three most common complaints are chloramine taste and odor, disinfection byproduct formation in summer, and moderate hardness causing scale on fixtures and appliances. Understanding which issue applies to your home guides you to the right solution rather than the most expensive one.

Coastal humidity is an underappreciated factor in how quickly hardness shows up. Even at 4 to 5 grains per gallon, Grand Strand fixtures tend to show scale faster than the same hardness level would produce in a drier climate. Shower doors, tankless water heater inlets, and refrigerator ice lines are typically the first places homeowners notice the problem.

See our full breakdown of Grand Strand water authority monitoring data in the GSWSA water quality guide.

Do Myrtle Beach homes need a water softener?

A softener is the right tool when hardness is the primary complaint. GSWSA hardness runs roughly 3 to 7 grains per gallon, which is moderate by national standards but enough to cause scale on fixtures, glass shower doors, tankless water heater inlets, and ice maker lines over one to two seasons in a coastal climate.

Signs that hardness is your issue: white chalky film on glass after the dishwasher runs, soap that takes extra effort to lather, showerheads that lose pressure faster than expected, and a water heater that requires earlier service intervals than the manufacturer projects. If only one or two of those symptoms apply, test the water before installing a softener. Our team does free in-home water tests that give you a grains-per-gallon reading on the spot.

For homes where hardness and chloramine taste are both present, a combined system is often the most cost-effective path: an ion exchange softener for hardness followed by a catalytic carbon stage for chloramine and disinfection byproducts. Many Myrtle Beach and Surfside Beach homeowners run that combination. Our water softener guide for Myrtle Beach covers sizing, salt type, and maintenance intervals specific to GSWSA water chemistry.

City-specific service pages for softening: Myrtle Beach water softening, North Myrtle Beach softening, Surfside Beach softening, Murrells Inlet softening, Conway softening, and Georgetown softening.

If you are researching salt free alternatives, see our water softening systems overview for a side-by-side comparison of ion exchange versus template-assisted crystallization on Grand Strand water chemistry.

What about well water on the Grand Strand?

Significant portions of rural Horry County, Georgetown County, and the Murrells Inlet area rely on private wells drawing from the Black Creek aquifer. That aquifer is a deep, confined freshwater formation, and it delivers water that looks clean but often carries iron, manganese, and tannins from organic matter in the formation geology.

Iron and manganese show up as orange to brown staining on sinks, tubs, toilets, and laundry. Tannins from decaying organic matter give water a yellow or tea color and a faintly earthy taste. Hydrogen sulfide produces a rotten egg odor, most noticeable on the hot water side. None of these are acute health concerns at typical well water concentrations, but they damage fixtures, ruin laundry, and make ice unusable. Our saltwater intrusion and coastal SC wells article covers the additional risk of sodium and chloride infiltration in shallow coastal wells near the Intracoastal Waterway.

The standard treatment starting point for Black Creek well water on the Grand Strand:

1. Sediment prefilter at the pressure tank to protect downstream equipment
2. Whole house iron and manganese filter using oxidation and filtration media sized to the iron load (test first)
3. Carbon filtration stage for tannins, hydrogen sulfide, and organic taste compounds
4. Point of use reverse osmosis at the kitchen sink for drinking and cooking water, especially if radium or nitrate testing reveals elevated readings

Well water chemistry varies by depth, location, and season. A professional water test from an accredited lab is essential before specifying equipment. We offer that service across Horry and Georgetown Counties. See our Murrells Inlet water filtration page for well-water-specific service details, and the coastal SC well water pillar for a full treatment framework across the South Carolina coast.

How does water quality differ by Grand Strand city?

GSWSA serves a large and geographically varied territory, and water chemistry is not identical across every city. Blend ratios, distribution line age, pressure zone geography, and proximity to the Bull Creek plant all create local variation worth understanding before choosing a treatment system.

Myrtle Beach and North Myrtle Beach: Core GSWSA service cities, drawing primarily from the Bull Creek surface blend. Higher organic carbon load from the Intracoastal source means disinfection byproduct attention is warranted, particularly in summer. Hardness typically falls in the 3 to 6 grains per gallon range.

Surfside Beach: Also on GSWSA. Compact residential area with a high concentration of older homes and mixed plumbing materials. Chloramine taste is the most common customer complaint we see in Surfside Beach. Service page: Myrtle Beach water filtration.

Conway: Partial GSWSA service alongside Bucksport Water. Some Conway properties on Bucksport Water draw from a separate source with different chemistry. Homeowners in western Conway near the Waccamaw River corridor should confirm which utility serves their address before specifying treatment equipment. Service page: Conway water softening.

Murrells Inlet: GSWSA serves portions of Murrells Inlet. Rural and unincorporated areas south of the Garden City corridor frequently rely on private wells from the Black Creek aquifer, with iron and tannin issues as the primary treatment needs. Service pages: Murrells Inlet softening and Murrells Inlet filtration.

Georgetown and Pawleys Island: Served by the Georgetown County Water and Sewer District, which draws entirely from the Black Creek aquifer. GCWSD water is stable in organic carbon (no surface water blend) but tends toward higher mineral content and the aquifer's characteristic fluoride and radium readings. For the radium and fluoride chemistry in detail, see our Black Creek aquifer article. Service page: Georgetown softening.

For a city-by-city breakdown of GSWSA monitoring data, see our GSWSA water quality guide.

What treatment system is right for Grand Strand homes?

Most Grand Strand city water homes fall into one of three treatment profiles. The right starting point depends on what your water test shows and which symptoms you are actually experiencing. The Myrtle Beach water softener guide and our Myrtle Beach water quality article both go deeper on each option.

Profile 1: Taste and odor only. If hardness is below 3 grains per gallon and the complaint is purely chloramine taste or seasonal byproduct odor, a whole house catalytic carbon system is usually sufficient. It is lower cost, lower maintenance, and does not add sodium to the water.

Profile 2: Taste plus hardness. This is the most common Grand Strand city water combination. An ion exchange softener handles hardness and extends appliance life. A downstream carbon stage handles chloramine and disinfection byproducts. If PFAS is also a concern, add a point of use reverse osmosis unit at the kitchen sink. Our reverse osmosis pillar covers RO sizing and maintenance for Grand Strand water. See the Charleston and Bluffton water quality pillar for how neighboring coastal utilities compare.

Profile 3: Well water with iron and tannins. The treatment stack for Black Creek aquifer well water typically starts with an oxidizing iron filter, followed by a carbon stage for tannins and organic odor, and optionally a point of use RO for drinking water. Sizing the iron filter to actual dissolved and particulate iron concentration matters: undersizing leads to resin fouling within one to two years.

We serve all Grand Strand cities, including those not listed individually above. A free in-home water test is the fastest way to confirm which profile applies to your home and get a quote matched to actual water chemistry rather than a regional average. Reach out at the contact page.

What to do this week

1. Pull your utility's most recent CCR using the GSWSA link above. Note hardness, TTHM/HAA5 readings, and any PFAS values. Verify current figures rather than relying on this article's estimates.
2. Inventory your appliances. Tankless water heaters, espresso machines, ice makers, and dishwashers are the earliest indicators of hardness-related scale damage.
3. Schedule a free in-home water test. We bring the test kit; you get a hardness reading in grains per gallon, a chlorine residual number, a TDS reading, and a pH, plus a plain-English explanation of how those numbers map to your CCR.