SW

Stormwater Directory

South Carolina

South Carolina Department of Environmental Services

Compare with other states →Suggest a correction

Quick Summary

For most South Carolina projects disturbing 1 acre or more, you need an SCR100000 Construction General Permit and a SWPPP. There is no state permit fee, and inspections must occur at least every 7 days.

State-DelegatedVerified 2026-03

Construction Permit

Permit Document ↗
Permit Name
NPDES General Permit for Stormwater Discharges from Construction Activities (Permit No. SCR100000)
Threshold
≥ 1 acre of land disturbance (or < 1 acre if part of a larger common plan of development or sale that will ultimately disturb ≥ 1 acre)
NOI Lead Time
NOI must be submitted to SCDES and acknowledged before land-disturbing activities begin; SCDES does not specify a minimum advance notice period in SCR100000 but recommends submitting at least 7 days before construction start to allow processing time
Application Method
Online via SCDES myDESC online portal (myDESC.sc.gov); paper NOI forms are also accepted by mail
Fee
No permit application fee for the SCR100000 general permit NOI; annual permit fees may apply under state law — verify with SCDES as fee schedules have been updated following the agency's 2023 transition from SCDHEC to SCDES
Permit Expires
October 30, 2027
Apply for Permit ↗

SWPPP Requirements

Permit Document ↗
SWPPP Required
Yes
PE Cert Required
No
Template Available
Yes
A Stormwater Pollution Prevention Plan (SWPPP) is required for all permitted sites. The SWPPP must be prepared before land-disturbing activity begins, kept on-site, and updated as conditions change. SCDES does not require a Professional Engineer stamp for SWPPP preparation on standard construction sites. SCDES provides a SWPPP template and guidance document on its website. The SWPPP must include a site map, description of BMPs, inspection schedule, and personnel responsible for implementation. Sites located in watersheds with impaired water bodies may need additional documentation.

Inspection Requirements

Permit Document ↗
Frequency
At least once every 7 calendar days during active land-disturbing activity, and within 24 hours after any storm event that produces ≥ 0.5 inches of rainfall in a 24-hour period; reduced inspection frequency (every 14 days) may be allowed for stabilized or inactive portions of the site
Rain Trigger
Within 24 hours of any storm event producing ≥ 0.5 inches of rainfall in a 24-hour period
Inspector Qualification
No specific state certification is required by SCR100000; however, inspections must be conducted by a 'qualified person' who has been trained in stormwater management principles. SCDES recommends training through programs such as CPESC (Certified Professional in Erosion and Sediment Control) or state-recognized courses, but does not mandate a specific credential
Accepted Certifications
CPESC, CESSWI, CISEC, or SC Land Disturbance Certificate accepted; state credential is an accepted alternative to national certs; licensed PE/RLS also qualifies

Discharge Standards

Permit Document ↗
Turbidity Limit
No numeric NTU turbidity limit in SCR100000; narrative water quality standards apply
South Carolina's water quality standards (S.C. Reg. 61-68) include narrative standards prohibiting discharges that cause or contribute to violations of surface water standards, including turbidity, color, and aesthetic criteria. Trout waters and other high-quality designated-use waters may trigger more stringent BMP requirements. Discharges to impaired water bodies listed on the 303(d) list require evaluation to ensure the SWPPP addresses the pollutant of concern. No statewide numeric turbidity effluent limit is established in the general permit.

Post-Construction

SCDES ↗
Required
Yes
Post-construction stormwater management is required under SCR100000 Part V and through local MS4 permit requirements. Permittees must ensure long-term operation and maintenance of post-construction BMPs. South Carolina's NPDES Phase II MS4 program requires operators of regulated MS4s to implement post-construction stormwater management programs. The South Carolina Stormwater Management BMP Handbook provides design standards for post-construction controls. Final stabilization must be achieved (70% uniform vegetative cover or equivalent) before the NOT (Notice of Termination) is submitted.

Impaired Waterbody / TMDL Requirements

Standard Provisions

South Carolina DHEC construction stormwater permit has standard provisions. Some enhanced protections apply near Outstanding Resource Waters (ORW) and Freshwater ORW designations, but no systematic heightened conditions are triggered solely by 303(d)-listed water impairment in the general permit. Standard NPDES stormwater BMPs apply statewide.

Program Contact

Contact Page ↗
Phone
(803) 898-4003

State-Specific Notes

South Carolina's stormwater construction permit program was administered by SCDHEC until July 1, 2023, when the South Carolina Department of Environmental Services (SCDES) was created as a standalone agency, separating environmental regulatory functions from SCDHEC. The permit number SCR100000 and program requirements carried over, but agency references must reflect the new SCDES branding. The state also requires compliance with the South Carolina Stormwater Management and Sediment Reduction Act (S.C. Code Ann. § 48-14-10 et seq.) and associated regulations (R.72-300 series). Local governments may impose additional erosion and sediment control requirements. Sites near Outstanding Resource Waters or Trout Waters are subject to enhanced standards. The myDESC portal is the primary online interface for NOI submission and permit management.

Disclaimer: This information is provided for general reference only and may not reflect the most current regulatory requirements. Always consult the SCDES website and applicable regulations before beginning any construction activity.