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DC Water FOG Program: Grease Interceptor & FSE Registration: Washington, D.C. restaurant guide

DC Water — Customer Compliance

What it is

Every food-service establishment must install and maintain a grease interceptor under the DC Plumbing Code, register with DC Water's FOG portal and keep cleaning records.

When a restaurant needs it

Any food-service establishment; the interceptor goes in during build-out.

How to apply

Show the interceptor on plumbing plans (DOB/DC Water review), then register the establishment in the FOG BMP Online Portal and log maintenance.

Documents you’ll need

Interceptor type, size and location on plumbing plans
Hauler/cleaning records (FOG maintenance log)

Fee

$24.50 per FSE per month FOG fee on the water bill

Processing time

Ongoing

Renewal

Gravity interceptors cleaned every 90 days (sooner if >25% full); hydromechanical every 30 days (sooner if >50% full)

Who files

The establishment registers; a DC-licensed plumber installs the interceptor.

Good to know

Hood-cleaning wastewater must be disposed of properly, and used cooking oil must be collected and recycled. DC Water inspectors check these during visits.

Official source

DC Water: FSE FOG requirements · DC Water fees & charges

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Last reviewed 2026-10-06. Guidance only, not legal advice.