Milwaukee County has two locations where you can recycle fire extinguishers. The current household waste collection does not accept Fire Extinguishers.
Milwaukee Recharging Service,
5707 W. Vliet, Milwaukee, 414-774-0772
https://www.milwaukeerecharge.com/
Open Monday through Friday 9am-4pm.
Closed Saturday and Sunday.
Accurate Recharge & Fire
5811 N. 96th, Milwaukee 414-464-1870
https://www.accuraterecharge.net/
Open Monday through Friday 8:00 AM - 4:30pm
Closed Saturday and Sunday