Take the Pledge for Clean Air Day 2025 California Clean Air Day is back on Wednesday, October 1! Pledge to replace one solo car trip with a sustainable option to reduce your emissions and create new habits to promote healthy air quality. Get moving for clean air by: • Walking, biking, or riding your scooter • Riding transit for free on Clean Air Day • Carpooling with family, friends, or coworkers • Skipping the commute and working from home Take the pledge for the chance to win an e-bike! Eligible residents of the San Diego region who pledge and check the box to receive communications from trusted partners will be entered into a sweepstakes to win a folding e-bike, powered by Rad Power Bikes. Learn more and pledge at SANDAG.org/cleanairday. SANDAG on Facebook / Instagram