Plumbers in Waldorf, MD

Southern Maryland's busiest crossroads

Waldorf is an unincorporated community in Charles County, about 19 miles from downtown Washington in a straight line. It has no town government; the Charles County Board of Commissioners runs things. It is the largest commercial and residential hub in Southern Maryland, a commuter suburb strung along US 301, and its population grew roughly sixteenfold between 1980 and 2020. Neighborhoods such as St. Charles and Smallwood Village sit off St. Charles Parkway, MD 5 (Leonardtown Road) and MD 228 (Berry Road), with St. Charles Towne Center as the retail anchor.

Where Waldorf's water comes from

The Charles County Department of Public Works, Utilities Division, operates the Waldorf Community water system, one of 17 water systems the county runs. Most of the supply is groundwater pumped from 18 deep wells in the Patapsco and Magothy aquifers, blended with treated surface water the county buys from WSSC Water, which draws on the Potomac and Patuxent rivers. The water is disinfected with chlorine. The county's water quality report does not list a hardness figure, so ask the Utilities Division at 301-609-7400 if you are sizing a softener. The same department runs the sewer system, with more than 950 miles of lines between water and sewer.

The county has filed its service line inventory with the Maryland Department of the Environment and posts it at charlescountymd.gov/slai if you want to check the pipe material recorded for your address.

Newer houses, different problems

In ZIP 20603, only about 6 percent of homes were built before 1980, and the biggest share went up between 1980 and 1999. That means fewer galvanized supply lines and cast iron stacks than in the inner suburbs, and more calls about aging tank water heaters, plastic supply fittings, sump pumps in finished basements and the first round of fixture and valve replacements.

Irrigation backflow is strict here

Charles County runs its own cross-connection control program. Every testable backflow assembly, irrigation included, must be tested at least once a year by a certified master or journey plumber. Lawn irrigation systems need an ASSE 1013 reduced pressure zone assembly, since pressure vacuum breakers are no longer allowed, and the system cannot be used until the assembly passes its yearly test. A new irrigation install also needs a Charles County backflow permit. The county's cross-connection specialist is at 301-609-5606.

Permits and gas

Permits come from Charles County Planning and Growth Management, Codes, Permits and Inspection Services, at 200 Baltimore Street in La Plata (301-645-0692). The county code adopts the International Plumbing Code and International Fuel Gas Code. Natural gas is supplied by Washington Gas. If you smell gas, get out of the house first, then call 911 and Washington Gas at 844-WASHGAS (844-927-4427), option 1.

How Waldorf differs from the District

Inside Washington, DC Water supplies Potomac water and the DC Department of Buildings issues permits. In Waldorf, much of the water starts underground, the county is both utility and permit office, and irrigation backflow rules are tighter. When you call, give the street or neighborhood and describe the problem, and you will be put through to an independent plumber who sets the price and schedule with you.