PFAS South Carolina Well Water Testing & Treatment

PFAS south carolina well water contamination is an emerging crisis that most homeowners do not know about until it is too late. Per- and polyfluoroalkyl substances, commonly known as PFAS or "forever chemicals," have been detected at alarming levels near military installations, industrial facilities, and firefighting training areas across the state. These synthetic chemicals do not break down in the environment or in the human body, and even tiny concentrations measured in parts per trillion are now linked to serious health effects including cancer, thyroid disease, immune system suppression, and developmental problems in children.

South Carolina has several documented PFAS contamination sites, and the true extent of the problem is almost certainly larger than current testing reveals. Private well owners near known contamination sources face the greatest risk because private wells are not regulated or monitored by any government agency. If you rely on a private well anywhere in South Carolina, understanding PFAS, knowing whether you are in a risk zone, and testing your water are essential steps for protecting your family's health.

What Are PFAS and Why Are They Dangerous?

PFAS are a family of more than 12,000 synthetic chemicals that have been manufactured since the 1940s. Their unique chemistry makes them resistant to heat, water, oil, and grease, which is why they have been used in everything from non-stick cookware and food packaging to stain-resistant fabrics and firefighting foam. That same chemical stability means they persist indefinitely in the environment and accumulate in the human body over time.

The two most studied PFAS compounds are PFOA (perfluorooctanoic acid) and PFOS (perfluorooctane sulfonic acid). Research has linked these chemicals to:

Cancer: Kidney cancer, testicular cancer, and other cancers have been associated with PFAS exposure in multiple epidemiological studies.
Thyroid disease: PFAS interfere with thyroid hormone production and regulation, potentially affecting metabolism, growth, and development.
Immune system effects: Studies show reduced vaccine effectiveness and increased susceptibility to infections in people with elevated PFAS blood levels.
Reproductive effects: Reduced fertility, pregnancy-induced hypertension, and low birth weight have been associated with PFAS exposure.
Cholesterol: PFAS exposure is consistently linked to elevated cholesterol levels, increasing cardiovascular disease risk.
Developmental effects in children: Exposure during pregnancy and early childhood may affect bone development, behavior, and immune function.

PFAS South Carolina Well Water: Known Hotspots

Several locations in South Carolina have documented PFAS contamination SC residents should be aware of. The primary sources are military installations that used aqueous film-forming foam (AFFF) for firefighting training and emergency response. AFFF contains high concentrations of PFAS that seep into the ground and contaminate aquifers.

Joint Base Charleston

Joint Base Charleston represents the most severe documented PFAS contamination in South Carolina. Testing has detected PFAS levels as high as 790,000 parts per trillion (ppt) in groundwater near the base, which is nearly 11,000 times the previous EPA health advisory level of 70 ppt and nearly 200,000 times the current EPA health advisory of 4 ppt for PFOA and PFOS individually. The contamination plume extends beyond the base boundaries, potentially affecting private wells in North Charleston and surrounding communities.

The Department of Defense has conducted investigations and provided alternative water supplies for some affected properties, but the full extent of the contamination plume has not been definitively mapped. Homeowners with private wells within 3 miles of Joint Base Charleston should test for PFAS regardless of whether they have been contacted by military officials.

Shaw Air Force Base (Sumter County)

Shaw AFB in Sumter County has documented PFAS contamination from decades of firefighting foam use. The base sits in the upper Coastal Plain, where sandy soils allow PFAS to migrate readily through the groundwater. Private wells in the Sumter area, particularly those downgradient from the base, may be affected. Testing data from the base shows multiple sites where PFAS concentrations exceed current EPA advisory levels.

Former Myrtle Beach Air Force Base (Horry County)

The former Myrtle Beach AFB, which closed in 1993, used AFFF extensively during its operational years. The base property has been redeveloped, but legacy PFAS contamination SC testing has confirmed persists in the groundwater. Given the sandy soils and high water table in Horry County, PFAS from the former base may have migrated into surrounding areas. The rapid residential growth around the Grand Strand makes this a particularly concerning situation, as new homes with private wells may be tapping into contaminated aquifers without the owners' knowledge.

Other Potential PFAS Sources in South Carolina

Military bases are the most well-documented PFAS sources, but they are not the only ones. Other potential sources of forever chemicals south carolina water contamination include:

Municipal firefighting training facilities: Many fire departments across the state used AFFF for training exercises. Training areas at fire academies and local fire stations may have localized PFAS contamination.
Industrial sites: Facilities that manufactured or used PFAS-containing products, including textile mills, chrome plating operations, and semiconductor manufacturers, may have released PFAS into the environment.
Landfills: Consumer products containing PFAS that are disposed of in landfills can leach PFAS into groundwater. Older unlined landfills pose the greatest risk.
Wastewater treatment plants: These facilities receive PFAS from industrial and household sources and can discharge PFAS-containing effluent into waterways that recharge aquifers.
Airports: Commercial airports use AFFF for crash response readiness, and accidental releases during training or emergencies can contaminate nearby groundwater.

EPA Health Advisory Levels

The EPA has dramatically tightened its health advisory levels for PFAS in recent years, reflecting growing scientific evidence of health effects at very low concentrations.

Standard	Level	Year Established
Previous EPA advisory (PFOA + PFOS combined)	70 ppt	2016
Current EPA advisory for PFOA	4 ppt	2024
Current EPA advisory for PFOS	4 ppt	2024
EPA MCL for PFOA (enforceable)	4 ppt	2024
EPA MCL for PFOS (enforceable)	4 ppt	2024
EPA Hazard Index (PFHxS, PFNA, HFPO-DA, PFBS)	Combined index of 1.0	2024

The 4 ppt standard is extraordinarily low — equivalent to about 4 drops of water in an Olympic-sized swimming pool. Detecting PFAS at these levels requires specialized laboratory equipment and methods that standard water testing labs may not offer. When testing for PFAS, ensure the laboratory uses EPA Method 533 or EPA Method 537.1, which are capable of detecting PFAS at the parts-per-trillion level.

Who Should Test for PFAS in South Carolina

PFAS testing SC wells should be a priority for any private well owner in the following situations:

Within 3 miles of a military installation: Current or former military bases that used AFFF are the highest-risk locations. This includes Joint Base Charleston, Shaw AFB, the former Myrtle Beach AFB, and any other military facility in the state.
Near firefighting training areas: Fire training facilities at airports, fire academies, and local fire departments may have used AFFF.
Near industrial sites: Properties near known or suspected PFAS users, including textile mills, chemical manufacturers, and chrome plating facilities.
Near landfills: Homes within 1 mile of active or closed landfills, particularly older unlined facilities.
During real estate transactions: Both buyers and sellers should consider PFAS testing as part of the due diligence process, especially in areas near known contamination sources.

Even if you do not fall into these categories, consider baseline PFAS testing if you rely on a private well. PFAS contamination SC sources are still being discovered, and new sites are identified regularly as testing expands.

PFAS Testing SC Wells: Options and Costs

Testing your well water for PFAS requires a certified laboratory capable of detecting these chemicals at parts-per-trillion concentrations. Standard water testing labs typically cannot perform PFAS analysis. Here is what to expect.

Test Type	Cost	What It Covers
PFOA/PFOS only (2 compounds)	$200–$300	The two most common and regulated PFAS
Standard PFAS panel (18–29 compounds)	$300–$400	Major PFAS including PFOA, PFOS, PFHxS, PFNA, PFBS
Comprehensive PFAS panel (40+ compounds)	$400–$500	Full EPA Method 533/537.1 analysis

When collecting samples for PFAS testing, follow the laboratory's specific instructions carefully. PFAS can be introduced from unexpected sources including some types of sample bottles, waterproof clothing, sunscreen, and food packaging. Most labs provide special PFAS-free sample containers and detailed collection instructions. Do not use personal protective equipment that may contain PFAS during sample collection.

Treatment Options for PFAS-Contaminated Well Water

If your well water tests positive for PFAS above EPA advisory levels, several treatment technologies can effectively reduce PFAS concentrations. The right choice depends on your contamination levels, budget, and whether you need whole-house or point-of-use treatment.

Activated Carbon Filters

Granular activated carbon (GAC) filters are effective at removing PFAS, particularly the longer-chain compounds like PFOA and PFOS. Point-of-use under-sink filters cost $300 to $500, while whole-house GAC systems range from $1,000 to $1,500 installed. Carbon filters need regular replacement, typically every 6 to 12 months depending on water usage and contamination levels, with replacement cartridges costing $50 to $200. GAC is most effective for PFOA and PFOS but less effective for shorter-chain PFAS compounds.

Reverse Osmosis Systems

Reverse osmosis (RO) is highly effective at removing virtually all PFAS compounds, including shorter-chain varieties that carbon filters may miss. Point-of-use RO systems for drinking and cooking water cost $200 to $500 installed. Whole-house RO systems are significantly more expensive at $2,000 to $5,000 and waste 2 to 4 gallons of water for every gallon produced. For most homeowners, a point-of-use RO system for drinking water combined with GAC for the rest of the house is the most cost-effective approach.

Ion Exchange Systems

Ion exchange resins designed specifically for PFAS removal are the most effective technology available, capable of reducing PFAS to non-detect levels. These systems cost $1,500 to $3,000 for whole-house installations and have higher ongoing maintenance costs than carbon or RO. They are typically recommended for heavily contaminated wells where other technologies cannot achieve adequate reduction.

Choosing the Right System

Technology	PFAS Removal	Cost Range	Best For
GAC (point-of-use)	Good for PFOA/PFOS	$300–$500	Low to moderate contamination, budget-conscious
GAC (whole-house)	Good for PFOA/PFOS	$1,000–$1,500	Moderate contamination, whole-house protection
Reverse osmosis (POU)	Excellent for all PFAS	$200–$500	Drinking/cooking water only
Ion exchange (whole-house)	Excellent for all PFAS	$1,500–$3,000	High contamination, maximum protection
GAC + RO combination	Excellent overall	$1,200–$2,000	Comprehensive protection at moderate cost

After installing any PFAS treatment system, retest your water within 30 days to confirm the system is performing as expected. Continue testing every 6 to 12 months to verify ongoing effectiveness, and replace filter media on the manufacturer's recommended schedule. Treatment systems are only effective when properly maintained.

South Carolina's Regulatory Response

South Carolina has been slower than some states in developing PFAS regulations and response programs. As of 2026, the state does not have its own PFAS drinking water standards, instead relying on federal EPA guidance and the new enforceable Maximum Contaminant Levels. SCDES (formerly DHEC) monitors PFAS in public water systems as required by federal law but does not have a program for private well testing or notification.

The Department of Defense is conducting investigation and cleanup activities at military installations under the federal CERCLA (Superfund) framework, but these processes move slowly. Homeowners near military bases who need immediate protection should not wait for government cleanup to address their drinking water concerns.

Resources for SC homeowners concerned about PFAS:

SCDES: Contact the SCDES Bureau of Water for information about PFAS monitoring in your area.
EPA Region 4: The EPA's southeastern regional office coordinates PFAS response activities including military base cleanups.
SC PFAS Action Network: Community organizations tracking PFAS contamination and advocating for stronger state regulations.
Local certified labs: Request a list of SCDES-certified laboratories capable of PFAS analysis at parts-per-trillion detection limits.

For more on SC water quality, read our well water quality guide, review R.61-71 well construction standards, and find local professionals in our South Carolina services directory.

Frequently Asked Questions

Can boiling water remove PFAS?

No. Boiling water does not remove PFAS and actually concentrates them as water evaporates. PFAS are extremely heat-stable chemicals that resist temperatures far above water's boiling point. Only activated carbon filtration, reverse osmosis, or ion exchange treatment can effectively remove PFAS south carolina well water contamination. Standard refrigerator filters and pitcher filters may reduce PFAS somewhat but are not tested or certified for PFAS removal at the levels required by current EPA standards.

How far can PFAS travel in groundwater?

PFAS can travel significant distances in groundwater, particularly in sandy soils like those found in the Coastal Plain and Lowcountry. Contamination plumes from military bases have been documented extending 3 miles or more from the source. In permeable sandy aquifers, PFAS can travel even farther. The contamination plume's extent depends on soil type, groundwater flow direction and speed, and the volume of PFAS released. This is why testing is recommended for any private well within 3 miles of a known or suspected PFAS source.

Are PFAS testing SC well requirements different from other states?

South Carolina does not currently require private well owners to test for PFAS. The federal EPA's new enforceable MCLs apply to public water systems, not private wells. Testing your private well is entirely voluntary, and the cost is the homeowner's responsibility. Some states like Michigan and New Hampshire have established state-funded private well testing programs near contamination sites. South Carolina has not implemented a similar program as of 2026. Regardless of state requirements, testing is strongly recommended if you are near a known contamination source.

Should I test for PFAS when buying a home with a well in SC?

Yes. PFAS testing should be part of any private well evaluation during a home purchase, particularly in the Lowcountry, near military installations, or near industrial areas. The $200 to $500 cost of a PFAS panel is insignificant compared to the cost of treatment systems or the health risks of drinking contaminated water. If PFAS is detected above EPA advisory levels, factor the cost of treatment into your purchase negotiations. A whole-house treatment system typically costs $1,500 to $3,000, and ongoing filter replacement adds $100 to $400 per year. Find well water testing professionals through our South Carolina services directory.