The San Diego County Board of Supervisors unanimously approved $8.75 million Wednesday to address the ongoing Tijuana River pollution crisis through health studies, infrastructure improvements and an expanded air purifier program. The Saturn Boulevard hotspot, where polluted water churns through concrete culverts, has been identified as the epicenter of the Tijuana River Valley air pollution crisis in the South Bay. The San Diego Air Pollution Control District launched the program in 2024, distributing over 10,000 purifiers to local residents. The new funding will expand the program from one to three air purifiers per household for approximately 35,000 households in the affected area. The $8.75 million in funding will be drawn from prior year unrestricted general fund balance made available as unlocked reserves.