What are the grease trap requirements in Mobile, AL?

Food service establishments in Mobile must install and maintain grease traps or interceptors per local FOG ordinances. The city follows the International Plumbing Code (IPC).

Do I need a grease trap permit in Mobile?

Yes, a FOG permit is required in Mobile. Fee: $50 routine inspection fee per FOG ordinance.

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

Grease trap sizing depends on your establishment's flow rate, number of fixtures, and local code requirements. 1,000 gallons minimum (Alabama state regulation for effective liquid capacity). Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Mobile, AL

FOG compliance regulations for food service establishments in Mobile, Alabama.

Per 25% rule

Pumping Freq.

Required

Permit

Yes

25% Rule

IPC

Code Base

Pumping Requirements

Frequency Per 25% rule; indoor traps require more frequent maintenance. Inspected using 25% rule, visual, and mechanical inspections

25% Rule Applies

Permits & Enforcement

Permit Required Required

Permit Fee $50 routine inspection fee per FOG ordinance

Max Fine $100–$200 per violation; plus civil penalties, compliance plan costs, and cleanup costs for blockages/SSOs

Complete FOG Regulations

Minimum Trap Size	1,000 gallons minimum (Alabama state regulation for effective liquid capacity)
Pumping Frequency	Per 25% rule; indoor traps require more frequent maintenance. Inspected using 25% rule, visual, and mechanical inspections
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Permit Fee	$50 routine inspection fee per FOG ordinance
Maximum Fine	$100–$200 per violation; plus civil penalties, compliance plan costs, and cleanup costs for blockages/SSOs
Inspections	Routine and compliance inspections by MAWSS
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	International Plumbing Code (IPC)
Ordinance Ref.	MAWSS Rules and Regulations No. 15; Alabama Admin Code 420-3-1-.27; Alabama IPC 2009 Chapter 10
Authority	Mobile Area Water & Sewer System (MAWSS)

Additional Notes

Use of alternative treatment products (enzymes, surfactants, solvents, emulsifiers) is prohibited. MAWSS performs routine and compliance inspections. Alabama minimum hydraulic detention time for grease traps is 2 days (48 hours).

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