1-2 of about 2 matches for site:www.septic.umn.edu enter sewage
http://www.septic.umn.edu/factsheets/septicsystemfailures/index.htm
house. Water or sewage surfacing in the yard or a ditch. Sewage odors indoors or outdoors
http://www.septic.umn.edu/factsheets/understandyoursystem/index.htm
Understanding Your Septic System | Onsite Sewage Treatment Program | Water Resources Center | University of Minnesota Campuses : Twin Cities Crookston Duluth