South Carolina Wastewater Variances regulations & environmental compliance analysis

South Carolina Wastewater Variances: What you need to know

Governing Law and Regulations

Adoption of federal wastewater variance procedures: South Carolina Code of Regulations (R.) 61-9.122

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South Carolina Department of Health and Environmental Control (DHEC) authority: R. 61-9.122.2

Publicly owned treatment works (POTW) requests: R. 61-9.122.21(n)

Non-POTWs: R. 61-9.122.21(m)

Expedited variances: R. 61-9.122.21(o)

Regulatory Agencies

South Carolina Department of Health and Environmental Control (DHEC) Office of Environmental Quality Control Bureau of Water

U.S. Environmental Protection Agency (EPA) Region 4

See ADDRESSES & CONTACTS for addresses and telephone numbers.

See national section for basic information and federal regulations.

Comparison: State vs. Federal

Rules. South Carolina has adopted the federal requirements for wastewater variances under the federal Clean Water Act (CWA) as part of the state's National Pollutant Discharge Elimination System (NPDES) wastewater permit program. See the national section WASTEWATER VARIANCES for more information about the federal requirements.

However, the state also often relies on its own variance approval authority. See the state section NPDES PERMIT for additional permit requirements.

Administration and enforcement. DHEC's Bureau of Water administers and enforces the water quality program, including variance requests, in South Carolina.

State Requirements


R. 61-9.122.2

DHEC may grant the following variances, subject to EPA approval:

  • Extensions under CWA Section 301(k) based on the use of innovative technology
  • Thermal discharge variances under CWA Section 316(a)

DHEC may also deny the following variances, or forward such variance requests to EPA, with or without a recommendation for EPA approval:

  • Variances ...

Read more about Wastewater Variances

South Carolina Wastewater Variances Resources

Type Title
Forms WPDES Discharge Permit Ammonia Limits Variance Application
See all Wastewater Variances Resources