Charles County Government has hired Flow Assessment Services, LLC to, perform a study of the county’s sewer system, starting on Monday, July 16. The purpose of the study is to locate storm water sources that might be connected to the sanitary sewer system. Connections such as catch basins, roof drains, area drains, broken sewer pipes, and open pipe joints will be located through a method called smoke testing.

The testing is performed on sewer manholes that are typically located in the streets or near your residence. Non-toxic and non-staining white smoke is inserted into the sanitary sewer system by means of a smoke generating device. During the test, smoke will be observed emitting from the manhole covers on the street and vent pipes located on the homes and local business establishments. Please do not become alarmed; this is normal.

In the unlikely event that smoke enters your building, do not be alarmed. Homes and businesses will receive fliers when testing will be performed within 24 to 72 hours. Heavy rain or weekends could possibly shift the testing beyond the 72-hour time frame. It is not necessary for you to be home while the testing is being performed.

The goal of this program is to reduce sewer maintenance costs and minimize flooding. This study will conclude after all sewer systems in the Pinefield and Waldorf area have been tested.  To learn more about this study, visit  For additional questions or concerns, call Charles County Public Works at 301-932-3440. Citizens with special needs may contact the Maryland Relay Service at 711, or Relay Service TDD: 800-735-2258.


About Charles County Government

The mission of Charles County Government is to provide our citizens the highest quality service possible in a timely, efficient and courteous manner. To achieve this goal, our government must be operated in an open and accessible atmosphere, be based on comprehensive long- and short-term planning and have an appropriate managerial organization tempered by fiscal responsibility. We support and encourage efforts to grow a diverse workplace. Charles County is a place where all people thrive and businesses grow and prosper; where the preservation of our heritage and environment is paramount; where government services to its citizens are provided at the highest level of excellence; and where the quality of life is the best in the nation.

It is the policy of Charles County to provide equal employment opportunity to all persons regardless of race, color, sex, age, national origin, religious or political affiliation or opinion, disability, marital status, sexual orientation, genetic information, gender identity or expression, or any other status protected by law.