The location and installation of each onsite wastewater system, and every part thereof, shall be such that, with reasonable maintenance, it will function in a satisfactory manner and will not create a nuisance or source of foulness, pose a threat to public health or safety of the environment, or otherwise adversely affect the quality of surface or ground water. Any person or entity owning or operating a facility on which an onsite wastewater system is installed shall be responsible for the inspection of, and any necessary upgrades to, the system.