54 Inland Empire census tracts rank in California's worst 1% for heavy-duty truck soot
Citrus Belt Review: The tool covers Riverside and San Bernardino counties — 34 high-ranked tracts in San Bernardino, 20 in Riverside — and models calendar year 2022, built by pairing truck-telematics activity data with CARB's EMFAC emissions model. The tracts cluster along the I-10, the rail lines, and the distribution belts that anchor the IE's logistics economy, mapping the air-quality ledger of the warehouse trade to the neighborhood.