South Carolina Grease Trap Regulations (2026)
Everything a South Carolina restaurant or commercial kitchen needs to know about grease trap requirements: who regulates it, how often you must clean, what permits and registration you need, what records to keep, and what violations actually cost. Citations link to the official source so you can verify every claim — and show your inspector you did.
South Carolina Requirements at a Glance
| Cleaning frequency | SCDES R.61-56 requires outside grease interceptors pumped every 30–90 days by a licensed pumper. Local utilities vary: Charleston Water System requires at least quarterly; Columbia requires interior traps cleaned weekly (or when over 50% full) and interceptors at least every 6 months. |
| State regulator | South Carolina Department of Environmental Services (SCDES), Bureau of Water |
| Governing regulation | S.C. Regulations R.61-9 (Water Pollution Control Permits); R.61-67 (wastewater facility construction); R.61-56 (onsite wastewater — outside grease interceptors pumped every 30–90 days) |
| Licensed hauler required | Yes — SCDES-licensed septage pumper / waste hauler — trucks must pass an SCDES suitability inspection and display the license; establishments must contract a licensed hauler or keep a written self-maintenance protocol (source) |
| Record retention | at least 2 years in Columbia (maintenance logs on-site); Charleston Water System requires logs and cleaning invoices submitted to its Wastewater Collection Department (source) |
Who Regulates Grease Traps in South Carolina
At the state level, South Carolina Department of Environmental Services (SCDES), Bureau of Water (program page) oversees FOG (fats, oils, and grease) discharge; the governing rule is S.C. Regulations R.61-9 (Water Pollution Control Permits); R.61-67 (wastewater facility construction); R.61-56 (onsite wastewater — outside grease interceptors pumped every 30–90 days). Day-to-day enforcement — inspections, cleaning intervals, fines — usually happens through your city or county sewer utility's pretreatment program, which can set stricter rules than the state.
Hauler Licensing
South Carolina requires grease trap waste to be transported by licensed/registered haulers under SCDES-licensed septage pumper / waste hauler — trucks must pass an SCDES suitability inspection and display the license; establishments must contract a licensed hauler or keep a written self-maintenance protocol. (source)
Manifests & Record Keeping
- Keep records at least 2 years in Columbia (maintenance logs on-site); Charleston Water System requires logs and cleaning invoices submitted to its Wastewater Collection Department. (source)
- Track everything in one place: free maintenance log and cleaning schedule template.
City Programs in South Carolina
Cities run their own FOG programs and often set stricter rules than the state:
Charleston
- Program: Charleston Water System Grease Trap and Interceptor Standards Program
- Ordinance: CWS Grease Interceptor Standards (100 mg/L FOG discharge limit)
- Cleaning frequency: At least quarterly, or as determined by a CWS inspector
- Permit: Grease trap/interceptor application with plans and specs; $30 application + $70 inspection fee
- Fines: No published fine schedule; violations get a written compliance notice (up to a 3-month deadline) before enforcement action
Columbia
- Program: City of Columbia Water Commercial FOG Management Program
- Ordinance: Columbia Sewer Use Ordinance §23-117; Engineering Regulations Parts 29–30
- Cleaning frequency: Grease traps: weekly, or when more than 50% full; interceptors: at least every 6 months
- Permit: Required per §23-117; sizing requirements apply (max 100 mg/L FOG discharge)
Worth Knowing in South Carolina
Heads up on the agency name: South Carolina moved its environmental functions from DHEC to the new Department of Environmental Services (SCDES) effective July 2023 — older local ordinances still cite DHEC but SCDES now administers them. There's no single statewide FOG ordinance; utilities enforce under state pretreatment authority, and new food service facilities must install at least a 1,000-gallon grease trap under SCDES construction standards.
Frequently Asked Questions
How often must grease traps be cleaned in South Carolina?
SCDES R.61-56 requires outside grease interceptors pumped every 30–90 days by a licensed pumper. Local utilities vary: Charleston Water System requires at least quarterly; Columbia requires interior traps cleaned weekly (or when over 50% full) and interceptors at least every 6 months. Your city's FOG program may require more frequent service — and regardless of the legal interval, clean before fats, oils, and grease reach 25% of trap capacity.
Can anyone pump my grease trap in South Carolina?
No — use a licensed/registered hauler (SCDES-licensed septage pumper / waste hauler — trucks must pass an SCDES suitability inspection and display the license; establishments must contract a licensed hauler or keep a written self-maintenance protocol). If your hauler dumps illegally, the paper trail you kept is your protection.
Do I need a permit for a grease trap in South Carolina?
In most South Carolina cities, yes — food service establishments must register with, or get a permit from, the local FOG / pretreatment program before discharging grease trap waste to the sewer. The exact permit and registration requirements vary by city; the major-city programs are listed above, and your local sewer authority has the specifics for your address.
Next Steps
- Find grease trap cleaning companies in South Carolina
- Run the South Carolina-adapted compliance checklist
- Put manifests and pricing in writing (free template)
Official Sources
- https://des.sc.gov/programs/bureau-water/wastewater/wastewater-laws-and-regulations
- https://des.sc.gov/sites/des/files/Library/Regulations/R.61-9.pdf
- https://des.sc.gov/sites/des/files/Library/Regulations/R.61-56.pdf
- https://des.sc.gov/programs/bureau-water/water-pollution-control-programs/sewer-sludge-program
- https://www.charlestonwater.com/132/Grease-Trap-Requirements
- https://columbiascwater.net/commercialfog/
This guide summarizes official sources for general information and is not legal advice. Rules change — confirm requirements with South Carolina Department of Environmental Services (SCDES), Bureau of Water and your local FOG program.
South Carolina Grease Trap Costs & Rules by City
City-level pricing, cleaning frequency and permit requirements:
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