From 2020 to 2023, DHEC sampled for PFAS compounds in drinking water at all Community Water Systems in the state. A Community Water System is a public water system that serves at least 15 service connections used by year-round residents or regularly serves at least 25 year-round residents. This may include, but is not limited to, subdivisions, municipalities, mobile home parks, and apartments.
We continue to work with water systems throughout the state to provide information, resources and data for how to best address these emerging PFAS contaminants.
Community Drinking Water Systems Using Surface Water
Sampling and analyses for community water systems where drinking water is supplied by surface waters have been completed by BOW staff. The results are presented as follows:
Community Drinking Water Systems Using Groundwater
Sampling and analyses for community drinking water systems where water is supplied by groundwater have been completed by BOW staff. The results are presented as follows:
PFAS - Shaw Air Force Base
- Please note that data for community water systems impacted by Shaw Air Force Base can be found here.
- This data is not included as part of the PFAS Drinking Water Strategy and therefore is not included in the Groundwater Well Data.
Some Observations:
Surface Water Plants (56 plants)
| Analyte | # Over MCL | Max concentration (ng/L) |
|---|---|---|
| PFOA | 13 | 12 |
| PFOS | 24 | 16 |
| PFNA | 0 | Non Detect |
| PFHxS | 0 | 5 |
| HFPO-DA | 0 | 5 |
| Hazard Index | 0 | 0.5 |
Groundwater Wells (352 systems with 870 wells)
| Analyte | # Over MCL | Max concentration (ng/L) |
|---|---|---|
| PFOA | 35 | 220 |
| PFOS | 29 | 33 |
| PFNA | 0 | 5.4 |
| PFHxS | 4 | 380 |
| HFPO-DA | 0 | 2.8 |
| Hazard Index | 3 | 42 |
*Page last updated 4/17/2024