Looking for a grease trap service in Black Diamond, WA? Describe your project once and up to three grease trap haulers who work in Black Diamond and King County get back to you with a quote. It's free and there is no obligation.
Black Diamond is home to about 6,787 people (2024 Census Bureau estimate), a growing community (+44.6% since 2020). With 1,029 people per sq mi, it is a semi-rural area. Restaurants and commercial kitchens here must follow the local fats, oils and grease program.
Black Diamond at a glance
- Population (Census Bureau estimate, 2024)
- 6,787 (+44.6% since 2020)
- Rank in Washington
- 112th of 281 cities and towns
- Land area
- 6.6 sq mi
- Population density
- 1,029 people per sq mi (semi-rural)
- Type
- City (Black Diamond city)
- Main county
- King County
What to check before hiring in Black Diamond
- FOG program: check Black Diamond's pumping frequency and record requirements.
- Permits: haulers must be permitted to transport and dispose of grease waste.
- Records: keep every manifest for inspections.
- Price drivers: trap size, frequency, access and disposal.
Useful official resources
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EPA: national pretreatment program
Official information and guidance.
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IAPMO
Official information and guidance.
Services available in Black Diamond
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Grease trap pumping
Scheduled pumping and cleaning, with manifests for the city's FOG program.
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Grease interceptor installation
Installation or replacement of a grease interceptor by a licensed plumber.
Frequently asked questions in Black Diamond
How much does grease trap pumping cost in Black Diamond, WA?
It depends on trap size, frequency and access. Describe your kitchen: haulers who serve Black Diamond reply with a quote.
Can pumping be scheduled after hours?
Most haulers offer early or late service.
What happens if I skip pumping?
Backups, odors and fines from the city.
Which grease trap haulers will contact me?
Up to three independent grease trap haulers who serve Black Diamond and the surrounding area, chosen for the service you need. Your details are shared only with your consent.
Source: U.S. Census Bureau, Population Estimates Program (Vintage 2024) and Gazetteer Files (public domain), imported on 10/31/2026. Figures describe the incorporated place or county as published; they are shown for information only.