“On-site wastewater disposal system” means any of several works, facilities, devices, or other mechanisms used to collect, treat, reclaim, or dispose of wastewater on, or immediately adjacent to, the property from which the wastewater is disposed.
     “Zone” means an on-site wastewater disposal zone formed pursuant to this Act.
     “Real property” means both land and improvements to land which is located within the zone.
     “Wastewater” means sewage, industrial waste or other waste, or any combination of these, whether treated or untreated plus any admixed land run-off.
     “Municipality” means the city, village or incorporated town forming a zone.