States / Washington / Issaquah
Issaquah, WA grease trap requirements
Program run by City of Issaquah (Municipal Code 16.38). Hand-checked against source Last verified 2026-10-18 by Stew Israil, GreaseTrapRules. Report an error / rule changed
Quick answer
- How often to pump: At least every 90 days; before grease + solids reach 25% of depth/capacity
- Interceptor minimum / sizing: No minimum size stated in the sources we checked. Your local program or plumbing code sets it; estimate with the sizing calculator.
- Permit / fees: Not stated in the sources we checked. Ask City of Issaquah (Municipal Code 16.38) whether a FOG or wastewater permit applies.
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.
Issaquah grease trap rules at a glance
Grease trap and FOG (fats, oils and grease) rules for restaurants in Issaquah are set by City of Issaquah (Municipal Code 16.38). Pumping: at least every 90 days; before grease + solids reach 25% of depth/capacity. Pumping must be done by an approved or licensed hauler.
Of the 4 Washington programs we track, 4 state a pumping schedule and 0 require a permit. We have not verified a pumping company for Issaquah yet; see Washington pumping companies. Compare all Washington cities.
Issaquah grease trap & interceptor rules, line by line
| Required trap / interceptor type | Not stated in the sources we checked |
|---|---|
| Sizing rule | Not stated in the sources we checked |
| Pumping / cleaning frequency | Gravity grease interceptors must be pumped in full when FOG reaches 25% of the overall liquid depth, and at least every 90 days unless documentation shows less frequent pumping meets the 25% rule (but not less than annually). Hydromechanical units must be cleaned at 25% of capacity (IMC 16.38.060). ✓ checked against source |
| Permit required? | Not stated in the sources we checked |
| Permit & program fees | Not stated in the sources we checked |
| Inspections | Not stated in the sources we checked |
| Record keeping | Not stated in the sources we checked |
| Pumper / hauler approval | Facilities with a gravity grease interceptor must use a licensed rendering and disposal company; waste must go to a permitted facility. ✓ checked against source |
| 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://issaquah.municipal.codes/IMC/16.38.060 · checked 2026-10-18
Grease trap cleaning & pumping companies in Issaquah, WA
No verified pumping company for Issaquah yet. Free listings are sorted A–Z. A listing is not an endorsement.
Before you book: Issaquah has hauler rules (see the table above). Ask the company to confirm it is approved for Issaquah, and keep a signed manifest for every pump-out.
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Size your interceptor
Use the grease interceptor sizing calculator (UPC, IPC and PDI methods), then confirm Issaquah's own minimums above. Not sure how often to pump? Read how often to pump a grease trap.
Issaquah grease trap FAQ
How often do grease traps have to be pumped in Issaquah, WA?
Pump at least every 90 days; before grease + solids reach 25% of depth/capacity. Source: City of Issaquah (Municipal Code 16.38), checked 2026-10-18. Rules change; confirm with the local sewer authority.
Who enforces grease trap rules in Issaquah, WA?
City of Issaquah (Municipal Code 16.38). Contact them for permits, inspections and approved haulers.
Nearby Washington cities
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