Nashville vs Memphis
Side-by-side FOG compliance comparison between Nashville, TN and Memphis, TN.
| Requirement | Nashville, TN | Memphis, TN |
|---|---|---|
| Plumbing Code | IPC (Tennessee adopted IPC as base plumbing code) | IPC |
| Min. Trap Size | 1,000 gallons minimum for exterior grease interceptors; interior hydromechanical traps per plumbing code fixture sizing | 1,000 gallons minimum for gravity grease interceptors; hydromechanical units sized per flow rate (minimum 20 GPM) |
| Pumping Frequency | At minimum every 90 days; Metro Water Services may require more frequent pumping for high-volume establishments | Every 90 days minimum; or when FOG and solids reach 25% of capacity |
| 25% Rule | Yes | Yes |
| Permit Required | Required | Required |
| Permit Fee | FOG permit/registration required; fee schedule set by Metro Water Services (typically nominal or included in sewer service) | No separate annual FOG permit fee published; covered under sewer use permit |
| Max Fine | $10,000 per day per violation under Metro Nashville Code; $50,000 maximum per violation under Tennessee Water Quality Control Act | $10,000 per violation per day; repeat offenders subject to sewer disconnection |
| Inspections | Annually; Metro Water Services inspects on routine and complaint-driven basis | Annual inspections; complaint-driven inspections as needed |
| Record Keeping | Yes | Yes |
| Authority | Metro Water Services (MWS), Industrial Pretreatment / FOG Program | City of Memphis Public Works Department - Stormwater & FOG Program |
| Establishments | 2,262 | 1,819 |
Key Differences
Even though both cities are in Tennessee, their FOG compliance requirements can differ significantly at the municipal level. Here are the most important differences restaurant operators should know:
- Nashville follows the Uniform Plumbing Code (UPC), while Memphis uses the International Plumbing Code (IPC). This affects trap sizing calculations and installation standards.
- Pumping schedules differ: Nashville requires "At minimum every 90 days", whereas Memphis requires "Every 90 days minimum".
- Both cities enforce the 25% rule, requiring grease traps to be pumped when grease and solids reach 25% of the trap's capacity.
- Fines differ: Nashville penalties can reach $10,000 per day per violation under Metro Nashville Code; $50,000 maximum per violation under Tennessee Water Quality Control Act, compared to $10,000 per violation per day; repeat offenders subject to sewer disconnection in Memphis.
What This Means for Restaurant Operators
If you operate food service establishments in both cities, understanding these regulatory differences is critical for compliance. Permit requirements vary, so check with each city's wastewater authority before opening a new location. Different plumbing codes (IPC (Tennessee adopted IPC as base plumbing code) vs IPC) mean trap sizing calculations may produce different results for the same kitchen setup. Always verify current requirements directly with your local wastewater authority or plumbing inspector.
Frequently Asked Questions
How do grease trap requirements compare between Nashville and Memphis?
Nashville follows the Uniform Plumbing Code (UPC), while Memphis uses the International Plumbing Code (IPC). This affects trap sizing calculations and installation standards. Pumping schedules differ: Nashville requires "At minimum every 90 days", whereas Memphis requires "Every 90 days minimum".
Which city has stricter grease trap enforcement, Nashville or Memphis?
Enforcement varies: both cities have similar permit requirements. Nashville fines: $10,000 per day per violation under Metro Nashville Code; $50,000 maximum per violation under Tennessee Water Quality Control Act. Memphis fines: $10,000 per violation per day; repeat offenders subject to sewer disconnection. Always verify with local authorities.
How do pumping schedules differ between Nashville and Memphis?
Nashville: At minimum every 90 days; Metro Water Services may require more frequent pumping for high-volume establishments. Memphis: Every 90 days minimum; or when FOG and solids reach 25% of capacity.
Regulations change frequently. Always verify current requirements with your local wastewater authority or plumbing inspector before making compliance decisions. Last updated: March 2026.
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