Buying Land in Barnwell County, South Carolina

A currently operating low-level radioactive waste facility

Barnwell County's most distinctive land-use fact isn't historical -- it's ongoing. Near the town of Snelling, on roughly 235 acres deeded to the State of South Carolina, sits a low-level radioactive waste disposal facility that has been receiving waste since 1971, operated the entire time by Chem-Nuclear Systems, L.L.C., a company now owned by EnergySolutions. This is a real, currently active industrial site, not a decommissioned legacy facility: a 2025 filing with the South Carolina Public Service Commission (covering the facility's Extended Care Maintenance Fund) confirms operations continuing through at least mid-2025.

What has changed over time is who the site can accept waste from. Following legislation passed by the South Carolina General Assembly around 2000, and effective since July 2008, the facility operates under the Atlantic Compact and now accepts low-level radioactive waste only from its three member states: South Carolina, Connecticut, and New Jersey -- a significant narrowing from the site's earlier, effectively nationwide intake. For a land buyer, the practical relevance is geographic and specific: this is a fixed, well-documented site near Snelling, not a countywide hazard, so its relevance to a given parcel scales with proximity. If you're evaluating land near the Snelling area specifically, ask directly about distance to the facility boundary and any related monitoring or buffer zones; for land elsewhere in Barnwell County, it's background context rather than a direct site concern.

Zoning: a countywide ordinance, separate from the City of Barnwell

Barnwell County maintains its own zoning ordinance covering unincorporated areas of the county, administered by the county's Building Inspector & Zoning office, working alongside a separate set of Land Development Regulations and a dedicated Mobile and Manufactured Housing Ordinance -- worth knowing specifically if your plan for a rural Barnwell County tract involves a manufactured or mobile home, since that ordinance sets out its own placement and permitting requirements distinct from the general zoning code. The City of Barnwell, the county seat, is a separate incorporated municipality with its own zoning ordinance (recently updated to cover a stated 2023-2033 planning period), administered by the city's own Building and Zoning office rather than the county's.

As with any South Carolina county, confirm directly which jurisdiction -- county or city -- governs your specific parcel, and pull the current zoning map and permitted-use table from that jurisdiction's own office rather than assuming either government's rules extend past its actual boundary.

Septic and the rest of the checklist

Septic (onsite wastewater) permitting in Barnwell County follows the statewide South Carolina model: SCDES, the state environmental agency, issues the permit directly through its own regional office rather than a county health department. Barnwell County is covered by SCDES's Aiken/Orangeburg regional office, which also serves Aiken, Allendale, Bamberg, Calhoun, Orangeburg, and Saluda counties. Barnwell sits outside South Carolina's eight-county coastal zone, so the Coastal Zone Management Act's critical-area permitting requirement has no bearing here -- the practical environmental review for most Barnwell County land is the standard Reg. 61-56 septic evaluation, plus, for parcels near Snelling specifically, awareness of the low-level waste facility described above.