Buses, trains and light rail across California rolled without fares Wednesday as the state marked its ninth annual Clean Air Day, an event organized by the Coalition for Clean Air that bills itself as the state's largest clean-air observance. Transit agencies from San Diego County to Sacramento waived fares for the day, while residents were encouraged to pledge small lifestyle changes meant to chip away at air pollution.
Caltrain marked the occasion on social media, noting the day was meant to show that “small changes add up to cleaner skies for everyone,” according to a post from Caltrain
's official account. Clean Air Day 2026 fell on Wednesday, October 7, continuing what
SANDAG
describes as an annual tradition the Coalition for Clean Air holds every year on the first Wednesday in October.
Free Rides Rolled Out From San Diego to Sacramento
The North County Transit District offered free rides on its COASTER, BREEZE, SPRINTER and NCTD+ services Wednesday, per the SANDAG rundown, while Via extended the same offer to its Mid-City Go, Southeastern Connect and El Cajon routes. Metrolink went further, letting riders board any Metrolink or Arrow train without a ticket, an offer confirmed on Metrolink's website. The railroad has pointed to transportation as a major source of greenhouse gas emissions in California, a point also noted by NBC 7 San Diego in its coverage of the fare waivers.
In Sacramento, SacRT let riders board fixed-route buses and light rail for free simply by printing or screenshotting a “Ride Transit” flyer and showing it at boarding, no fare required. The agency paired the offer with a temporary bus bridge between City College, Fruitridge and 47th Avenue stations tied to ongoing construction. SacRT has argued the stakes are significant: the agency says an average transit bus can remove roughly 60 single-occupant vehicles from the road during a typical commute, while a single light-rail train car can replace approximately 100 cars.
Southern California Transit Agencies Join In
Down in Los Angeles, LADOT Transit offered free rides across its services and layered on an extra incentive: two free rides on its West LA now or South LAnow microtransit services for anyone who entered the code CLEAN2026. The fare waivers reflect a broader pattern this year, with multiple regional operators choosing to waive fares rather than simply promote awareness campaigns.
Beyond the transit deals, the day centers on individual pledges. Californians 18 and older were encouraged to commit to at least one clean-air action, while companies, agencies and nonprofits could organize teams and K-12 students could learn about air quality in the classroom. The pledge platform tracks commitments ranging from finding alternative transportation and eating vegetarian for a day to composting, gardening and advocating for clean-air policy.
Thousands Pledged Action Last Year
Organizers have real numbers to point to from the prior cycle. In 2025, 5,376 Californians pledged more than 22,000 clean-air actions, according to cleanairday.org, with more than 500 organizational partners helping build what the site calls a community around clean air that year. The same site notes that, every year, tens of thousands of Californians commit to individual actions meant to reduce pollution and protect public health.
The Clean Air Day website also hosts a practical tool for residents: daily timelapse maps drawn from the AirNow Fire and Smoke Map, covering nine regions across California and updated daily. Organizations looking to get involved were pointed toward resources and engagement-tracking tools, including shareable links they could send to employees or community members, according to the organization pledge page.
Local Events Planned Beyond Transit
Not every community marked the day on Wednesday itself. Lompoc scheduled its own Clean Air Day Fair for Saturday, October 10, running from 2 to 4 p.m. at Ryon Park. Organizers told Noozhawk the fair would let attendees tour a city bus and learn about local commuting options, alongside music, games, crafts and booths from local organizations. It's a smaller-scale echo of the transit-focused promotions playing out in bigger metro areas the same week.
