Phoenix vs Fort Worth
Side-by-side FOG compliance comparison between Phoenix, AZ and Fort Worth, TX.
| Requirement | Phoenix, AZ | Fort Worth, TX |
|---|---|---|
| Plumbing Code | UPC (Arizona adopts UPC statewide) | IPC (Texas adopted IPC with local amendments) |
| Min. Trap Size | Gravity grease interceptors minimum 750 gallons for food service establishments; sizing per Phoenix City Code and Arizona Plumbing Code based on fixture count and flow rate; point-of-use interceptors minimum 20 GPM | 1,000 gallons minimum for exterior grease interceptors; hydromechanical grease interceptors (HGIs) must be minimum 50 GPM rated per UPC/manufacturer specs |
| Pumping Frequency | Every 90 days minimum; more frequently if grease accumulation exceeds 25% of capacity | At minimum every 90 days; must be pumped when FOG and solids accumulate to 25% of wetted depth |
| 25% Rule | Yes | Yes |
| Permit Required | Required | Required |
| Permit Fee | Industrial pretreatment/FOG permit required; registration fees typically $50-$150 annually | Included with Industrial Waste Discharge permit; no separate FOG fee typically published |
| Max Fine | $2,500 per violation per day under Phoenix City Code; administrative penalties may also apply | $2,000 per violation per day (Class C misdemeanor under city code); up to $10,000/day for industrial pretreatment violations |
| Inspections | City of Phoenix Environmental Services Division inspects FSEs; frequency varies, typically annually for permitted facilities | At least annually; high-risk facilities may be inspected quarterly |
| Record Keeping | Yes | Yes |
| Authority | City of Phoenix Water Services Department, Environmental Services Division | Fort Worth Water Department, Environmental Division / Pretreatment Section |
| Establishments | 8,992 | 4,506 |
Key Differences
As cities in different states, Phoenix (AZ) and Fort Worth (TX) operate under distinct regulatory frameworks. Here are the most important differences restaurant operators should know:
- Phoenix follows the Uniform Plumbing Code (UPC), while Fort Worth uses the Uniform Plumbing Code (UPC). This affects trap sizing calculations and installation standards.
- Pumping schedules differ: Phoenix requires "Every 90 days minimum", whereas Fort Worth requires "At minimum every 90 days".
- 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: Phoenix penalties can reach $2,500 per violation per day under Phoenix City Code; administrative penalties may also apply, compared to $2,000 per violation per day (Class C misdemeanor under city code); up to $10,000/day for industrial pretreatment violations in Fort Worth.
What This Means for Restaurant Operators
If you operate food service establishments in either city, 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 (UPC (Arizona adopts UPC statewide) vs IPC (Texas adopted IPC with local amendments)) 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 Phoenix and Fort Worth?
Phoenix follows the Uniform Plumbing Code (UPC), while Fort Worth uses the Uniform Plumbing Code (UPC). This affects trap sizing calculations and installation standards. Pumping schedules differ: Phoenix requires "Every 90 days minimum", whereas Fort Worth requires "At minimum every 90 days".
Which city has stricter grease trap enforcement, Phoenix or Fort Worth?
Enforcement varies: both cities have similar permit requirements. Phoenix fines: $2,500 per violation per day under Phoenix City Code; administrative penalties may also apply. Fort Worth fines: $2,000 per violation per day (Class C misdemeanor under city code); up to $10,000/day for industrial pretreatment violations. Always verify with local authorities.
How do pumping schedules differ between Phoenix and Fort Worth?
Phoenix: Every 90 days minimum; more frequently if grease accumulation exceeds 25% of capacity. Fort Worth: At minimum every 90 days; must be pumped when FOG and solids accumulate to 25% of wetted depth.
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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