What are the grease trap requirements in Naperville, IL?

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

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

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) and city requirements. Use our free sizing calculator for a recommendation.

Grease Trap Requirements
Naperville, IL

Q: Do I need a grease trap permit in Naperville?

Yes, a FOG permit is required in Naperville. Fee: Unknown - contact City of Naperville Building Department; DuPage County inspection fee $150.

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

Regular cleaning per manufactu

Pumping Freq.

Required

Permit

Yes

25% Rule

IPC

Code Base

Pumping Requirements

Frequency Regular cleaning per manufacturer specifications and city requirements

25% Rule Applies

Permits & Enforcement

Permit Required Required

Permit Fee Unknown - contact City of Naperville Building Department; DuPage County inspection fee $150

Max Fine Unknown - per city sewer use ordinance enforcement provisions

Complete FOG Regulations

Minimum Trap Size	Per Illinois Plumbing Code (77 IL Admin Code 890) and city requirements
Pumping Frequency	Regular cleaning per manufacturer specifications and city requirements
25% Rule	Yes — trap must be pumped when grease and solids reach 25% of capacity
Permit Required	Yes
Permit Fee	Unknown - contact City of Naperville Building Department; DuPage County inspection fee $150
Maximum Fine	Unknown - per city sewer use ordinance enforcement provisions
Inspections	Periodic per city/DuPage County oversight
Record Keeping	Required — maintain pumping logs and manifests on-site
Plumbing Code	International Plumbing Code (IPC)
Ordinance Ref.	Naperville Code of Ordinances Title 4 (Health and Safety); Illinois Admin Code 77-890.510; DuPage County Chapter 36 Wastewater Ordinance
Authority	City of Naperville Public Works / DuPage County Public Works

Additional Notes

All waste lines and drains carrying grease in food establishments must be directed to interceptors per IL state code. No discharge of grease trap sludge into treatment works without express authorization. Grease transporters must carry shipping papers.

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