Waste water, or sewage, is the spent water of a home, business or population. In many rural areas, the sewage is treated by means of a septic tank followed by a network of piping, gravel and soil known as an on-site sewage system. The Environmental Health Division is responsible for evaluating proposed building sites and issuing construction permits for sewage systems.

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The Environmental Health Division plays a vital role in the planning of building sites. No municipality, township or other governing body shall issue a building permit for a premises requiring a sewage system before obtaining permission from the Health Officer.