What are the grease trap requirements in Joliet, IL?

Food service establishments in Joliet 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 Joliet?

Yes, a FOG permit is required in Joliet. Fee: Unknown - contact Building & Inspectional Services at 815-724-4070.

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

Grease trap sizing depends on your establishment's flow rate, number of fixtures, and local code requirements. Per Illinois Plumbing Code (77 IL Admin Code 890). Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Joliet, IL

FOG compliance regulations for food service establishments in Joliet, Illinois.

Monthly minimum by licensed gr

Pumping Freq.

Required

Permit

Yes

25% Rule

IPC

Code Base

Pumping Requirements

Frequency Monthly minimum by licensed grease hauler (unless different schedule set by city)

25% Rule Applies

Permits & Enforcement

Permit Required Required

Permit Fee Unknown - contact Building & Inspectional Services at 815-724-4070

Max Fine Unknown - city may clean at owner's expense including labor, materials, admin costs, and contractor fees

Complete FOG Regulations

Minimum Trap Size	Per Illinois Plumbing Code (77 IL Admin Code 890)
Pumping Frequency	Monthly minimum by licensed grease hauler (unless different schedule set by city)
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Permit Fee	Unknown - contact Building & Inspectional Services at 815-724-4070
Maximum Fine	Unknown - city may clean at owner's expense including labor, materials, admin costs, and contractor fees
Inspections	Periodic inspections by city to verify operating conditions
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	International Plumbing Code (IPC)
Ordinance Ref.	Joliet Code of Ordinances Chapter 21 (Offenses); Illinois Admin Code 77-890
Authority	City of Joliet Building & Inspectional Services Division

Additional Notes

Exterior and interior grease traps/interceptors require building department permits for construction, repair, or maintenance. Only State of Illinois licensed grease haulers permitted. If owner fails to correct deficiencies, city may clean and charge all costs to owner.

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