New Diesel-Fueled Generators Threaten California’s Climate and Health

Posted by Rypos on Apr 12, 2022 2:00:00 PM


The increase in the number of diesel-fueled backup generators in the state of California is both an obstacle to the state achieving its greenhouse gas reduction targets and drives nearly $136 million in annual health costs.

Ninety percent of the backup generators in California are diesel-powered. The South Coast Air Quality Management District, which includes Orange County and parts of Los Angeles, Riverside, and San Bernardino counties, has seen an increase in diesel-run generators by 22% over the last year.

The Bay Area Quality Management District, which includes the nine counties that surround San Francisco Bay, has seen a 34% increase over the last three years.

Combined, these two major districts had 23,507 backup generators with a capacity of 12.2 gigawatts in 2021, roughly 15% of California’s entire electricity grid.

What’s concerning is that these new diesel generators produce 20 metric tons of fine particulate matter annually. This pollution could trigger almost $31.8 million in annual health costs in the Bay Area and $103.9 million in South Coast communities. Pollutants, particulate matter, and chemicals released from diesel-fueled generators contribute to heart attacks, respiratory conditions, and hospital visits, mainly in lower-income communities.

And the majority of these diesel generators are located in communities labeled as “disadvantaged” by the California Environmental Protection Agency. The generators are also situated near populated areas made up of worksites, schools, and homes. Across the state of California, diesel generators are permitted by each of the air districts but the data for privately-owned generators is self-reported.

“We understand the need for backup diesel generators,” said Bill Collins, RYPOS’ VP Sales and Marketing, “Our job is to make sure our clients are compliant with both local and federal emissions requirements. A lot of the solutions out there are maintenance intensive but the Rypos Active Diesel Particulate Filter (ADPF) uses segmented filters to trap and incinerate soot containing toxic contaminant particles. The ADPF is a Level 3 Plus diesel emission control device for stationary generators that requires low maintenance, has low back pressure to maximize engine performance, and reduces total particulate matter by 95%+.”

To find out more about our Active Diesel Particulate Filter for power generation, click here or contact Bill Collins at (508) 429-4552 or

Tags: California, CARB, Pollution

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