What are the grease trap requirements in Oklahoma City, OK?

Food service establishments in Oklahoma City must install and maintain grease traps or interceptors per local FOG ordinances. The city follows the Uniform Plumbing Code (UPC).

Do I need a grease trap permit in Oklahoma City?

Yes, a FOG permit is required in Oklahoma City. Fee: No separate FOG permit fee; covered under sewer discharge provisions.

What size grease trap do I need for my restaurant in Oklahoma City?

Grease trap sizing depends on your establishment's flow rate, number of fixtures, and local code requirements. 750 gallons minimum for gravity grease interceptors (some sources indicate 1,000 gallons for larger FSEs); hydromechanical interceptors per plumbing code sizing. Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Oklahoma City, OK

FOG compliance regulations for food service establishments in Oklahoma City, Oklahoma. Serving 2,090 food service establishments.

At minimum every 90 days

Pumping Freq.

Required

Permit

Yes

25% Rule

IPC (Oklahoma uses IPC with state amendments)

Code Base

Pumping Requirements

Frequency At minimum every 90 days; must be pumped when combined FOG and solids layer exceeds 25% of liquid depth

25% Rule Applies

Permits & Enforcement

Permit Required Required

Permit Fee No separate FOG permit fee; covered under sewer discharge provisions

Max Fine $10,000 per day per violation; up to $25,000 per day for knowing violations under federal pretreatment standards

Complete FOG Regulations

Minimum Trap Size	750 gallons minimum for gravity grease interceptors (some sources indicate 1,000 gallons for larger FSEs); hydromechanical interceptors per plumbing code sizing
Pumping Frequency	At minimum every 90 days; must be pumped when combined FOG and solids layer exceeds 25% of liquid depth
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Permit Fee	No separate FOG permit fee; covered under sewer discharge provisions
Maximum Fine	$10,000 per day per violation; up to $25,000 per day for knowing violations under federal pretreatment standards
Inspections	Annually; OKC Utilities conducts routine and complaint-based inspections
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	IPC (Oklahoma uses IPC with state amendments)
Ordinance Ref.	Oklahoma City Municipal Code Chapter 50 - Utilities, Article VIII - Sewer Use Regulations; OKC Water Utilities Trust FOG Program
Authority	Oklahoma City Water Utilities Trust, Pretreatment / FOG Compliance Division

Additional Notes

Oklahoma City requires all FSEs to install and maintain grease interceptors. The OKC Water Utilities Trust administers the FOG program. Facilities must submit maintenance records and use licensed haulers. Automatic grease removal devices may be approved as supplements but generally cannot replace gravity grease interceptors. Records must be kept for at least 3 years.

Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.

Contact Information

Phone (405) 297-2833

Oklahoma City Utilities Department: (405) 297-2833

Official Sources

FOG and Restaurants page

Size Your Grease Trap for Oklahoma City

Our free calculator uses IPC (Oklahoma uses IPC with state amendments) code requirements to recommend the right size.

Open Calculator

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Must be pumped when grease and solids reach 25% of...

Grease Trap RequirementsOklahoma City, OK