Grease Trap Cleaning in Billings, MT: Cost, Rules & Top Companies (2026)
Running a commercial kitchen in Billings? Staying on top of grease trap cleaning keeps you out of a sewer backup and compliant with Montana's FOG rules. Here's what it costs in Billings, how often you're required to clean, the permit and regulation basics, and the local companies that handle it.
What Grease Trap Cleaning Costs in Billings
Billings prices near the national baseline; dense provider competition across the metro keeps rates competitive.
| Trap / interceptor size | Typical cost per service |
|---|---|
| Small trap (under 50 gal) | $115 – $240 |
| Medium trap (50–500 gal) | $150 – $475 |
| Large interceptor (500–1,500 gal) | $400 – $1,200 |
| Large interceptor (1,500+ gal) | $475 – $2,500 |
Typical ranges per service — your price depends on trap size, accessibility, and frequency. Recurring contracts usually run 15–30% below one-off rates. Estimate yours with the cost estimator or see the full pricing guide.
How Often You Must Clean It in Billings
No statewide interval — set by municipal programs and trap size/usage. Missoula requires total removal of interceptor contents at each service. The industry-standard 25% rule applies either way: clean before fats, oils, and grease reach a quarter of your trap's capacity, because past that point grease passes straight through to the sewer. High-volume kitchens (fryers, BBQ, seafood) often need service more often than the minimum.
Billings Grease Trap Requirements, Permits & Penalties
| Program | City of Billings wastewater/sewer pretreatment (official page) |
| Governing code | Billings Municipal Code §26-604; Ordinance No. 13-5603 |
| Permit / registration | Food establishments on public sewer must have an approved grease system (trap or interceptor) |
Always get a signed manifest at every service and keep your records — that's the proof inspectors ask for. For the full Montana breakdown (hauler licensing, record retention, state penalties), see the Montana grease trap regulations guide.
Top Grease Trap Cleaning Companies in Billings
Screened companies serving Billings and the surrounding metro:
- Billings Grease Trap Services · 4.9★ · (406) 633-4333
- Andersen Sewer Service · (406) 245-7593
- Mountain West Renewables · (406) 794-3111
- TLC Patriot Septic & Excavation Services · (406) 633-4333
See all grease trap companies in Billings → or get free quotes from several at once.
Frequently Asked Questions
How much does grease trap cleaning cost in Billings?
In Billings, expect roughly $150–$475 for small-to-medium traps and $400–$1,200 for larger interceptors per service. Billings prices near the national baseline; dense provider competition across the metro keeps rates competitive. Get 2–3 local quotes to compare — it's free.
How often do I have to clean my grease trap in Billings?
No statewide interval — set by municipal programs and trap size/usage. Missoula requires total removal of interceptor contents at each service. Regardless of the calendar, clean before FOG and solids reach 25% of capacity — past that, grease escapes to the sewer, which is what triggers violations.
Do I need a permit for a grease trap in Billings?
Food establishments on public sewer must have an approved grease system (trap or interceptor). See the Montana regulations guide for details.
What are the penalties for grease trap violations in Billings?
Fines are set by the local sewer authority and can escalate for repeat violations. Keep a signed manifest from every cleaning and your maintenance records on file — that's what inspectors ask for first.
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