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ongoingTraps ≥30 days; interceptors ≥90 days (plus 25% rule)Nashville

FOG / Grease Service Records — Nashville (Metro Water Services)

Nashville grease traps must be serviced at least every 30 days and interceptors at least every 90 days (plus the 25% rule), by a registered hauler, with records kept onsite.

Official Source
Metro Water Services — Environmental Compliance
https://www.nashville.gov/departments/water/environmental-compliance/grease-management

What it is. Recurring cleaning of the grease trap/interceptor with records retained onsite, under Metro Water Services requirements.

Who issues/enforces it. Metro Water Services — Environmental Compliance (Metro layer).

When you need it. Ongoing. Grease traps (smaller under-sink units) must be serviced at least every 30 days; grease interceptors (larger/underground) at least every 90 days. In addition, clean whenever FOG plus settled solids reach 25% of capacity ("25% rule").

How to comply. Contract a hauler that holds a valid TDEC license and is registered with Metro Water Services; keep cleaning records onsite.

Cadence. Traps ≥ every 30 days; interceptors ≥ every 90 days; plus the 25% rule.

What SpoonSeal tracks. The document(s) you upload for this requirement, with automatic renewal/expiration tracking (Current, Due Soon, Expired). Where the city publishes health-inspection results (e.g., NYC and Chicago), SpoonSeal syncs them automatically; elsewhere they can be added manually.

References

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This guide is informational and not legal advice. Always confirm current requirements with the official agency linked above.