The diesel engine powers the American economy, moving about 94 percent of the country’s freight. But we also know that diesel exhaust poses a serious health risk to many Oregonians - especially to minority and low-income communities.
However, the advent of cleaner technology, fostered by the adoption of strict emission standards for new engines, led to the development of remarkably low-emitting diesels that rival natural gas as the long-time hallmark of low emission engines. Clean diesel now means cleaner air. The remaining challenge is the durability of existing diesel engines. These engines have a long natural life and low turnover rate, which effectively postpones the time when we can truly call all diesels “clean”.
What is DEQ doing about it? For the past decade, DEQ engaged fleet partners to help them transition to low-emission technology by providing technical assistance and applying for grants.