The Brief Montgomery County’s gas-powered leaf blower ban is now in effect with $500 fines for violations. Lawmakers proposed a temporary exemption for landscapers, with a public hearing set for July 15. A ban on the use of gas-powered leaf blowers and vacuums across Montgomery County took effect Tuesday, prohibiting their use on private, commercial and local government properties. The new law exempts Montgomery County Public Schools and parks, which are state-managed. Image 1 of 4 ▼ Montgomery County gas-powered leaf blower ban takes effect, exemption proposed