October 18, 2019Regular pumping of your septic system every five years maintains the effectiveness and longevity of your system, reduces nutrient leaching over time, and helps protect the groundwater and drinking water supply. Contact the Frederick County Health Department, (301) 600-1726, if you need help locating your septic system, test you water for bacteria, or obtain contacts for licensed labs in your area that can test for harmful substances. Download Septic Rebate Paperwork