Dallas Water Utilities — Liquid Waste / Pretreatment
Not legal advice. Last verified 2026-09-23 · confidence high. Confirm with the city before you set a contract.
Minimum interval: 90 days.
Accumulation rule: As often as necessary but not less than every 90 days, or whenever 25% or more of the interceptor contains floating materials, sediment, oils, or grease (Dallas City Code Chapter 19, Sec. 19-126.2(c); pretreatment FAQ). Completely emptied and cleaned by a licensed hauler.
Records: Retention period not stated on cited sources — keep invoices on site.
Hauler: Liquid waste hauler licensed by the Texas Commission on Environmental Quality and Dallas Water Utilities. Keep manifests on site.
Permit: Liquid waste generator requirements per Chapter 19 — confirm your permit status.
Enforcement: Inspectors issue citations for missed pumping, bad manifests, or over-25% accumulation. Confirm current fine schedule.
NFPA 96 frequencies (widely republished by fire departments): solid fuel monthly; high-volume quarterly; moderate semiannual; low-volume annual. Insurers and local fire inspectors can be stricter.