The Region of Queens Municipality operates two waste water treatment facilities. The South Queens Waste Treatment Facility, constructed in 2000, consists of an aerated lagoon system capable of treating 3.2 million gallons per day of sewage. Material requiring treatment is piped through 40km of pipe via 19 pumping stations located throughout Liverpool, Milton and Brooklyn.
The second facility is located in Caledonia. Constructed in 1997, it uses a sequencing batch reactor and services 1,110 homes in Caledonia. The sewage network consists of 5km pipe and 2 pumping stations. Operation of this plant is fully automated and is monitored through the Public Works Garage in Liverpool via remote operation software.