This week, you are deciding which class of water treatment fits your household's needs for managing PFAS, also known as per- and polyfluoroalkyl substances or 'forever chemicals'. Your choice will depend on understanding what federal monitoring reveals about PFAS presence in Florence's public water supply and how treatment options address these compounds.
Firefighting foam, textile finishing and landfill sources: which fits this region's record?
PFAS originate from various sources including firefighting foam, textile finishing, and landfill leachates. The Florence City public water system uses surface water and serves over 79,000 residents. Federal monitoring from late 2024 to late 2025 shows detections of several PFAS types. PFOA and PFOS have been detected above reporting levels and the newly established federal maximum contaminant levels (MCLs) for some samples, indicating their presence in the source water. Other compounds like PFHxS, PFNA, and HFPO-DA were not detected above reporting levels. This pattern suggests that typical PFAS sources affecting Florence align with persistent, legacy compounds like PFOA and PFOS rather than newer or less common variants. This knowledge helps narrow which PFAS forms your treatment should target.
Why a granular carbon bed and an ion-exchange resin are documented differently for PFAS
Treatment technologies for PFAS vary in how they reduce specific compounds. Granular activated carbon beds are effective at adsorbing longer-chain PFAS such as PFOA and PFOS from water, making them a staple for household systems addressing these substances. Ion-exchange resins, on the other hand, target a broader range of PFAS, including shorter-chain and emerging fluorinated compounds with different chemical behaviors. Documentation for these technologies differs because they have distinct mechanisms of action and efficiencies depending on the PFAS profiles in the water. Understanding the local presence of PFOA and PFOS, mostly above the federal MCL in sampled Florence water, suggests that a carbon-based treatment or a combined approach with ion-exchange resin may be appropriate for comprehensive reduction.
Which fixtures, appliances or processes are affected first and why
PFAS contamination affects all water outlets equally since it is dissolved in water distributed system-wide. However, drinking water fixtures—faucets used for direct consumption or food preparation—are priority locations for treatment because ingestion is the main exposure pathway. Appliances like ice makers or coffee machines that use untreated water will also deliver PFAS-laden water unless filtered. Point-of-entry treatment systems configured with technologies like the Pentair PFAS Forever Chemicals Filter can provide comprehensive reduction for the entire household water supply including kitchen and bathroom taps. Point-of-use options can be layered if targeting specific fixtures.
How to compare this area's record with a neighbouring county's without overreading it
Comparing Florence’s PFAS data with neighbouring counties requires caution. Each water system draws from different sources and undergoes independent monitoring. In Florence, the public water supply’s record includes three detections of PFOA and four of PFOS above the federal reporting level, with highest levels near 0.0067 micrograms per liter (6.7 parts per trillion). Adjacent counties might have differing PFAS profiles due to local industrial activity or source water differences. It’s important not to assume your water matches any regional average. Official monitoring results provide area-level data which guide general risk assessments, but they do not pinpoint any individual home’s water quality. Homeowners should rely on their own water tests for precise treatment decisions.
How many samples and wells stand behind the figures, and what a small sample means
The Florence water system’s monitoring includes 28 samples collected between November 2024 and September 2025 across the public supply. While this is a substantial dataset for the system as a whole, it represents a relatively small sample in relation to the entire network of over 34,000 connections. This means detected PFAS concentrations reflect system-wide trends and not localized conditions at your specific home. Small samples cannot capture all variability in water quality. Therefore, the presence of PFAS in several samples—above the federal MCL for PFOA and PFOS—does not prove that every tap or well in Florence has those levels. It confirms that these compounds occur at measurable levels in the overall water system, warranting consideration in choosing effective treatment.
What you should NOT conclude from area data
Area sampling data does not specify your home's water conditions. Detection of PFAS in Florence's public water system is not a violation by itself, nor a direct indicator that your household water exceeds any health threshold. Federal regulations now set MCLs to guide safety limits, but a detection above the reporting level is purely an analytical measurement. The decision on the class of treatment you require depends on your own water quality test results, your tolerance for ‘forever chemicals’, and your preferences for treatment technology. The Pentair PFAS Forever Chemicals Filter ships ready to configure and is documented to address the compounds found in Florence's water system, providing a reliable option for households aiming to reduce PFAS exposure effectively.
Where this information comes from
Source: EPA SDWIS public water system record. Sampled 2025-09-15. These figures describe the public water system's record, not the plumbing inside any individual building.
On record: EPA UCMR5 monitoring (2023-2025) for FLORENCE CITY OF (SC2110001) (SC2110001), SC: 280 results across 10 listed contaminants, 18 detections above the reporting level; 7 results above a 2024 federal MCL