Union County, SC
The federal environmental record for Union County (population 26,629): what is on file, where it is, and what remains open. Sources and retrieval dates are on the methodology page.
0
Superfund NPL sites
0
federal cleanup sites
2
PFAS-detecting water systems
4
TRI facilities
12
open tank releases
Drinking water: PFAS testing
Public water systems serving Union with at least one PFAS detection under UCMR5. The federal limit for PFOA and PFOS is 4 ng/L; EPA proposed in May 2026 to rescind the limits for the other compounds, which are shown for information.
| System | Highest results | Reading |
|---|---|---|
| UNION CITY OF (4410001) SC4410001 | PFPeA: 11.9 ng/L PFHxA: 8.2 ng/L PFOS: 6.1 ng/L | above final limit |
| MEANSVILLE RILEY W/D (SC4420001) SC4420001 | PFOA: 5.2 ng/L PFOS: 4.9 ng/L PFPeA: 4.7 ng/L | above final limit |
On a system with detections? Testing and treatment options
Facilities reporting toxic releases (2024)
4 facilities in Union filed TRI reports for 2024, totalling 11k lb released.
| Facility | City | Top chemicals | Total released |
|---|---|---|---|
| STELLA-JONES CORP | WHITMIRE | Arsenic And Arsenic Compounds, Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) | 9k lb |
| THE TIMKEN CO - TYGER RIVER PLANT | UNION | Methanol, Copper | 2k lb |
| ORGANIC DYES & PIGMENTS | UNION | - | 0 lb |
| SPECTRA COLORANTS | UNION | - | 0 lb |
Underground fuel tanks
EPA's UST Finder records 110 tank facilities in Union: 91 tanks in service and 247 closed. 66 fuel releases are on record, of which 12 remain open. Open releases are cleanups that have not reached "no further action".
Radon
EPA maps Union as Zone 3, the lowest predicted indoor radon (under 2 pCi/L average). Radon and air quality are covered in depth on lung.com.
The record for one specific address
County figures blur what matters: distance. The Address Environmental Report runs these same federal datasets against one address and reports every site, tank, polluter and water result around it, with distances, in about a minute.
Get the report - $39