The Town of Leesburg Department of Utilities supplies water and sewer inside town, separate from Loudoun Water, while Loudoun County Building and Development issues permits after a town zoning permit, and Washington Gas runs mains in the area. Plumber Washington DC Pros is a free referral service, not a plumbing company. Call the number on this page to be connected with a local plumber in Leesburg.

Plumbing services in Leesburg
Loudoun's county seat
Leesburg was established in 1758, serves as the Loudoun County seat and is Virginia's largest incorporated town within a county, with 48,250 residents in 2020. It sits about 33 miles west-northwest of downtown Washington, where U.S. Route 15 and Virginia Route 7 meet and the Dulles Greenway ends. A National Register historic downtown is ringed by newer subdivisions, and Morven Park, Ida Lee Park and Leesburg Executive Airport are local landmarks. The median home dates to about 1993, though the historic district holds far older buildings.
The town's own water system
Leesburg treats Potomac River water at its Kenneth B. Rollins Water Filtration Plant and also has one groundwater well, the Paxton well. The town disinfects with sodium hypochlorite, a chlorine compound, and reports hardness of about 100 to 150 ppm (5.8 to 8.8 grains per gallon), varying with rainfall. That is moderate, so water heater flushing and occasional faucet cartridge replacement are reasonable maintenance here. The system also serves some customers outside the corporate limits, and the town's service area map settles who is on town water near the edges.
The town maintains water lines in the street up to and including the meter. From the meter box to the house, the supply line belongs to the owner. The town keeps a service line material inventory and, through a Service Line Compliance Campaign, asks some customers to identify the material of their private line where it enters the basement or crawl space.
Sewer backups: call the town first
For a suspected backup, Leesburg asks residents to call Utilities at 703-771-2750 (weekdays) before hiring anyone; after hours, emergencies go through the police non-emergency line, 703-771-4500. On-call staff check whether the town main is blocked. If it isn't, the problem is on the private side: the resident is responsible for the whole sanitary lateral from the house to the main, even where part of it runs under public property.
Backflow, permits and gas
The town's Cross Connection Control Program requires every testable backflow device to be tested each year by a DPOR-certified tester, with results filed on the town's form. Residential irrigation results are due by June 1, and a failed device needs a passing report within 15 days. For permits, get a Town of Leesburg Zoning Permit first; Loudoun County Building and Development then issues the building and trade permits (703-777-0220). Washington Gas operates mains in downtown Leesburg. If you smell gas, leave first, then call 911 and Washington Gas at 844-WASHGAS (844-927-4427), option 1.
Leesburg compared with DC
In Washington, DC Water handles water and sewer and owners deal with one city permit office. Leesburg has its own utility, a two-step town and county permit path and owner responsibility for the full sewer lateral. Call with your neighborhood and what is going wrong, and you will be connected with an independent plumber who sets price and timing with you.
Common questions in Leesburg
Who should I call first for a sewer backup in Leesburg?
When is the irrigation backflow test due in Leesburg?
How do I get a plumbing permit for a home in Leesburg?
How hard is Leesburg's water?
Nearby cities and towns
Sources
- Wikipedia: Leesburg, Virginia
- Town of Leesburg: Utilities FAQs
- Town of Leesburg: Water quality report (PDF)
- Town of Leesburg: Backflow and cross connection
- Town of Leesburg: Home improvement projects
- Town of Leesburg: Lead awareness
- Loudoun County: Building permits
- Patch: Gas main relocation in downtown Leesburg
- City-Stats: Leesburg housing
- Washington Gas: Safety
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