Most Grand Strand homeowners connected to the Grand Strand Water and Sewer Authority (GSWSA) already receive chlorine-disinfected water that meets EPA coliform standards. For them, UV purification is an optional but valuable second layer of protection, particularly during summer when treatment plants handle peak tourist demand. The picture changes sharply for the tens of thousands of Horry County residents on private wells: SC DHEC data shows coliform bacteria in a significant share of coastal plain wells, and private wells receive zero municipal disinfection. UV purification eliminates 99.99% of bacteria and viruses by disrupting their DNA, rendering them unable to reproduce. It works in seconds, adds no chemicals, and creates no disinfection byproducts. If you are on well water in the Myrtle Beach area, or if you want a chemical-free safety net on top of GSWSA water, a UV system is one of the most effective point-of-entry investments you can make. Call (843) 890-0511 for a free water test to know exactly what you are dealing with.
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How Does UV Water Purification Work?
UV water purification destroys harmful microorganisms without adding any chemicals to your water. Water passes through a stainless steel chamber housing a UV lamp that emits light at a wavelength of 254 nanometers. That specific wavelength penetrates the cell walls of bacteria, viruses, and protozoa, destroying their DNA and preventing them from reproducing. The microorganisms are not removed from the water; they are rendered permanently inactive. See the EPA's guidance on UV disinfection for drinking water at epa.gov.
A well-sized residential UV system delivers 99.99% inactivation of pathogens including E. coli, Giardia lamblia, Cryptosporidium, Legionella, and Hepatitis A. That 99.99% figure is the 4-log standard the EPA sets for virus inactivation under the Surface Water Treatment Rule (40 CFR Part 141). Systems certified by NSF International to NSF/ANSI Standard 55 Class A are independently verified to meet that standard.
The process is fast: typical whole-house systems treat water in under two seconds of contact time. There is no tank, no storage, no chemicals, and no byproducts. The water entering and leaving the UV chamber tastes identical. For more detail on how UV compares to other disinfection approaches, see our guide to UV water disinfection and when you need it.
What Does GSWSA Water Quality Data Actually Show?
The Grand Strand Water and Sewer Authority serves Myrtle Beach, North Myrtle Beach, Surfside Beach, Conway, Pawleys Island, and Georgetown. Their Consumer Confidence Report (CCR), published annually and available at gswsa.com, reports detected contaminant levels and compliance with EPA maximum contaminant levels (MCLs).
GSWSA draws from the Waccamaw River and Bull Creek, both surface water sources treated at the Bull Creek and Myrtle Beach water treatment plants. Surface water treatment requires more intensive disinfection than groundwater because surface sources are more susceptible to seasonal contamination from agricultural runoff, storm events, and high organic loads during summer algae blooms.
Total coliform and E. coli in finished water are required by the EPA's Revised Total Coliform Rule to be absent in 95% of monthly samples. GSWSA consistently meets this standard for its distribution system. However, coliform presence in a distribution system can increase when summer demand spikes reduce the residence time of chlorine in pipes, or when the system draws from supplementary sources. This is the scenario where UV purification provides meaningful added protection at the point of entry to your home.
For a deeper look at GSWSA's annual water quality data, see our article on Grand Strand water quality and what the GSWSA data reveals. For disinfection byproducts formed during chlorination, see our review of disinfection byproducts in coastal SC water systems.
Why Are Well Water Homes in the Myrtle Beach Area at Higher Risk?
Private wells in Horry County and surrounding coastal counties operate entirely outside the GSWSA distribution system. They receive no chlorination, no treatment, and no regulatory monitoring beyond what the property owner initiates. SC DHEC recommends private well owners test annually for coliform bacteria and every 3 years for a broader panel of contaminants.
The coastal plain geology that defines this region creates specific vulnerability for wells. Shallow aquifers are more susceptible to surface contamination from septic systems, agricultural drainage, and storm surge. SC DHEC's private well data consistently shows coliform detections in a portion of tested coastal plain wells. For specifics on what SC DHEC recommends for private well testing, visit scdhec.gov.
If your property uses a well and you have not tested for bacteria in the last 12 months, or if your test came back with any coliform detection, UV treatment is the most reliable solution. It provides continuous whole-house protection without the maintenance complexity of chemical dosing systems. Read our complete guide to well water treatment in the Carolinas for the full picture. For the specific risk of nitrate contamination in coastal wells, see nitrate in well water by county risk level.
On a well? Get tested first.
A free in-home water test identifies exactly which bacteria, minerals, and contaminants are present. We serve the entire Grand Strand and Lowcountry.
Call (843) 890-0511What UV Purification Does NOT Remove: The Complete Picture
UV purification handles the biological threat. It does not address chemical or mineral contamination. Understanding this boundary is essential for Grand Strand homeowners making a treatment decision.
PFAS (Forever Chemicals)
UV light does not break down PFAS compounds. Grand Strand water has documented PFAS concerns tied to upstream industrial discharge. A reverse osmosis system is the recommended approach for PFAS removal. See our guide to the EPA PFAS rule and its impact on SC water.
Chlorine and Disinfection Byproducts
UV does not remove chlorine or the trihalomethanes and haloacetic acids formed when chlorine reacts with organic matter. For GSWSA customers, a whole-house carbon filter is the right tool for these concerns.
Iron and Manganese
Iron is a common problem in coastal plain wells. High iron will actually foul a UV lamp's quartz sleeve, reducing effectiveness. Iron must be addressed upstream of any UV system. Our article on iron in well water covers treatment options.
Hardness Minerals
UV does not soften water. If you have hard water in your well supply, a water softener is needed separately. See how well water differs from city water in South Carolina in terms of mineral content and treatment needs.
For most well water situations on the Grand Strand, the recommended treatment train is: sediment pre-filter, iron filter (if needed), water softener or conditioner (if needed), UV system, then a reverse osmosis unit at the kitchen tap for drinking and cooking. This sequence protects the UV lamp and delivers comprehensive water quality throughout the home.
Which Grand Strand Communities Are Most Likely to Benefit?
UV purification benefits vary depending on whether your home is on municipal water or a private well, and on your specific location along the Grand Strand.
Myrtle Beach and North Myrtle Beach (GSWSA municipal): UV provides a useful secondary layer during summer peak season. Priority for families with immunocompromised members, infants, or elderly residents.
Conway, Pawleys Island, Georgetown (GSWSA service area): Municipal water meets EPA standards; UV is supplemental. Well water users in these areas have elevated coliform risk given coastal plain soils and higher agricultural activity.
Surfside Beach and Murrell's Inlet: Mix of GSWSA connections and private wells. Many older properties in these communities were developed before municipal water reached their streets.
Vacation and short-term rental properties: High guest turnover means fluctuating water demand and increased plumbing stress. UV treatment provides guests with a verifiable safety layer and reduces liability for rental owners. See our guide to water treatment for beach rental properties in SC.
How Do UV Systems Compare to Water Softeners and Reverse Osmosis?
UV systems, water softeners, and reverse osmosis systems each address completely different water problems. They are not alternatives to each other; in many homes, all three play a role.
A water softener addresses hardness minerals (calcium and magnesium) that cause scale buildup on appliances and fixtures. GSWSA water runs approximately 3 GPG, which is relatively soft. Many Grand Strand well water sources test harder. For information on water softener options in the Myrtle Beach area, see our guide to water softeners in Myrtle Beach SC.
A reverse osmosis system uses a semipermeable membrane to remove dissolved solids including PFAS, nitrates, lead, and most chemical contaminants at rates exceeding 93.6% TDS rejection. It does not kill bacteria; the membrane blocks them, but a compromised membrane allows breakthrough. Pairing RO with UV at the point of entry provides both chemical and biological protection. Read more about how reverse osmosis works for drinking water.
UV purification is the targeted solution for the biological side of water quality. For Grand Strand well water users, it belongs at the point of entry to the home, after any sediment or iron filtration but before water reaches taps, appliances, and the water heater. Solomon Home Water Solutions typically completes whole-home treatment installs in 2 to 4 hours and backs systems with a 7-year warranty on equipment.
What to Expect When Installing a UV System in a Grand Strand Home
Installing a UV purification system on the Grand Strand typically begins with a water test to understand your full water profile. The test guides system sizing and determines whether pre-treatment (sediment filtration, iron removal) is needed to protect the UV lamp's quartz sleeve from fouling.
System sizing is based on flow rate, typically measured in gallons per minute. A family of four in a 2,000 square foot home with two full bathrooms typically needs a system rated at 8 to 12 GPM to handle simultaneous water use without reducing UV contact time below effective levels. Undersizing a UV system is the most common installation error and the primary reason for reduced pathogen inactivation.
The UV lamp itself requires annual replacement. UV output declines over time even when the lamp still illuminates, and a lamp that has passed its service date may no longer deliver adequate germicidal dose. Most modern systems include a monitoring indicator or alarm that signals when the lamp is due for replacement. Solomon Home Water Solutions provides a 7-year warranty on systems and a lifetime warranty on tanks, and serves the full Grand Strand from Myrtle Beach and Conway to Georgetown and Pawleys Island.
For a full overview of what a whole-home treatment system installation involves on the SC coast, see our guide to whole-house water system installation on the SC coast.
Frequently Asked Questions About UV Water Purification on the Grand Strand
Does Myrtle Beach tap water need UV purification?
Most Myrtle Beach municipal water from GSWSA is already disinfected with chlorine and does not require a UV system for basic safety. However, UV purification adds a meaningful second layer against coliform bacteria that can survive chlorination, particularly during summer peak demand when treatment plant loads are highest.
Is UV purification the same as a water filter?
No. UV purification uses ultraviolet light to destroy the DNA of bacteria, viruses, and protozoa, rendering them unable to reproduce. It does not remove sediment, chlorine, PFAS, or hardness minerals. For complete water treatment on the Grand Strand, pair a UV system with a carbon whole-house filter or a reverse osmosis unit.
Do well water homes in Myrtle Beach need UV treatment?
Yes, in most cases. Private wells in Horry County and surrounding coastal counties are not regulated by GSWSA and receive no municipal disinfection. SC DHEC data consistently shows coliform detections in private wells across the coastal plain. A UV system is the most reliable point-of-entry solution for eliminating bacteria without adding chemicals.
What does UV water purification NOT remove?
UV light only addresses microbial threats. It does not remove chlorine, chloramines, PFAS, lead, nitrates, hardness, sediment, or disinfection byproducts. Grand Strand homeowners concerned about PFAS or chemical contaminants should also install a reverse osmosis system or whole-house carbon filter alongside UV treatment.
How long does a UV water purification system last?
The UV lamp requires annual replacement to maintain 99.99% effectiveness, as UV output diminishes over time even when the lamp still glows. The system housing and quartz sleeve typically last 10 years or more with proper maintenance. Solomon Home Water Solutions backs systems with a 7-year warranty on the unit itself.
Have more questions about UV purification for your specific Grand Strand address? Call (843) 890-0511 and we will answer them directly.