Alameda County Code §6.60.050 limits use of electric or gas leaf blowers, sweepers, vacuums, mowers, trimmers, edgers and hedgers in residential areas to 7 a.m.-7 p.m. weekdays and 8 a.m.-7 p.m. weekends if plainly audible 50 feet from the device.
Section 6.60.050 of the County noise chapter prohibits operating any electric or gasoline-powered leaf blower, sweeper, vacuum, lawn mower, trimmer, edger, hedger or similar tool in residential areas between 7 p.m. and 7 a.m. on weekdays and between 7 p.m. and 8 a.m. on weekends if the sound is plainly audible at 50 feet. Castro Valley has no separate gas-blower ban (unlike Berkeley or Piedmont); state law AB 1346 phases out new gas-powered SORE equipment sales statewide from 2024, but use of existing equipment remains legal within the county's hour window.
Operating a blower or mower outside the allowed window is a Chapter 6.60 violation - misdemeanor up to $1,000/six months; administrative citation $100-$500 per occurrence through Code Enforcement. Commercial landscapers face the same hour limits.
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