Can my septic system contaminate my water?

Yes, particularly if the effluent is not adequately treated, as in a failing system. Untreated effluent is a health hazard and can cause many human diseases. Once this untreated effluent enters the groundwater, you and your neighbor’s wells can be contaminated. Also, if this sewage reaches nearby streams or water bodies, wildlife beds and recreational swimming areas may also be jeopardized.