Honolulu, HI grease trap requirements
Program run by City and County of Honolulu Department of Environmental Services (wastewater discharge permit). Hand-checked against source Last verified 2026-10-18 by Stew Israil, GreaseTrapRules. Report an error / rule changed
Quick answer
- How often to pump: The official sources we checked don't set a fixed schedule for Honolulu. Most programs require pumping before grease and solids reach 25% of the trap's depth (check yours). Confirm with City and County of Honolulu Department of Environmental Services (wastewater discharge permit).
- Interceptor minimum / sizing: Peak flow × 30-minute retention × 1.25
- Permit / fees: Permit required
Rules change; verify with your city. Summaries are plain-English restatements of the official source linked below; “Source says” shows the exact wording. Blank rows mean the sources we checked did not state that rule, not that there is no rule.
Honolulu grease trap rules at a glance
Grease trap and FOG (fats, oils and grease) rules for restaurants in Honolulu are set by City and County of Honolulu Department of Environmental Services (wastewater discharge permit). The official sources we checked do not set a fixed pumping interval for Honolulu, so plan on pumping before grease and solids reach 25% of the trap (the most common rule) and follow any schedule on your permit. Sizing: peak flow × 30-minute retention × 1.25. A FOG or wastewater permit is required.
Of the 1 Hawaii program we track, 0 state a pumping schedule and 1 requires a permit. We have not verified a pumping company for Honolulu yet; see Hawaii pumping companies. Compare all Hawaii cities.
Honolulu grease trap & interceptor rules, line by line
| Required trap / interceptor type | Not stated in the sources we checked |
|---|---|
| Sizing rule | Minimum grease interceptor volume V = F × R × S: peak flow (gpm) × 30-minute retention time × 1.25 storage factor. ✓ checked against source |
| Pumping / cleaning frequency | Not stated in the sources we checked |
| Permit required? | Grease interceptor projects are reviewed under the City's Industrial Wastewater Discharge Permit policy. ✓ checked against source |
| Permit & program fees | Not stated in the sources we checked |
| Inspections | Wastewater Service Investigators take a core sample from the interceptor to determine pumping frequency, so the interceptor must stay accessible. ✓ checked against source |
| Record keeping | Not stated in the sources we checked |
| Pumper / hauler approval | Not stated in the sources we checked |
| Reporting portal | Not stated in the sources we checked |
| Fines & penalties | Not stated in the sources we checked |
| Program contact | Not stated in the sources we checked |
Sources
- https://www.honolulu.gov/env/wp-content/uploads/sites/29/2025/05/GI_Review_Policy_Sept2010.pdf · checked 2026-10-18
Grease trap cleaning & pumping companies in Honolulu, HI
No verified pumping company for Honolulu yet. Free listings are sorted A–Z. A listing is not an endorsement.
Before you book: ask for a full pump-out (not a skim) and a signed manifest for every service, and keep it on site for inspectors.
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Try the Hawaii pumper list for companies serving nearby cities.
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Size your interceptor
Use the grease interceptor sizing calculator (UPC, IPC and PDI methods), then confirm Honolulu's own minimums above. Not sure how often to pump? Read how often to pump a grease trap.
Honolulu grease trap FAQ
What size grease interceptor is required in Honolulu?
Peak flow × 30-minute retention × 1.25, per the official source. Your plumbing official can require more.
Do restaurants in Honolulu need a grease trap permit?
Permit required, per the official source checked 2026-10-18.
Who enforces grease trap rules in Honolulu, HI?
City and County of Honolulu Department of Environmental Services (wastewater discharge permit). Contact them for permits, inspections and approved haulers.
Grease trap guides
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