5 Rivers Auto is a local smog check station and used car dealer in Eureka, CA, offering fast, reliable emissions tests with walk-ins welcome. Get your California smog inspection done quickly for just $65 while ensuring your vehicle meets state emissions standards.​ Proudly located in Eureka - the county seat of Humboldt County - and serving nearby communities like Arcata, McKinleyville, and Fortuna on the North Coast.​ Open seven days a week, including Saturdays and Sundays! In addition to smog checks, find quality used cars on-site from a trusted local dealer in Eureka, California.​