We are a privately held company in Aberdeen, MD proudly doing business for 57 years.

John’s Septic Service is a family owned and operated business serving Harford County, Cecil County and Baltimore County since 1969. It all began when the first John Call started the business with little more than a 1957 Dodge 1 ½ ton truck equipped with a homemade, 1000 gallon steel tank, and enough integrity and old-fashioned work ethic to fill it up, many times over. John Septic Service is state certified for septic inspections.