Dumfries gets water and sewer from Prince William Water, but unlike most of the county it runs its own Building and Inspection Department, so plumbing permits inside town limits come from the town. Columbia Gas of Virginia and Washington Gas both operate in the county, so check your bill for gas. Plumber Washington DC Pros is a free referral line, not a plumbing contractor; call the number on this page to be connected with a local plumber in Dumfries.

Plumbing services in Dumfries
Virginia's oldest continuously chartered town
Dumfries was chartered in 1749 and is described as the oldest continuously chartered town in Virginia. It began as a colonial tobacco port on Quantico Creek and is now a commuter town of 5,679 residents (2020 Census) just east of I-95, about 29 miles from downtown Washington. U.S. Route 1, Route 234 and Main Street, where Town Hall sits, run through it, and the Weems-Botts Museum and the Williamstown neighborhood are local reference points. It has a council-manager government.
Permits come from the town
This is the biggest local difference. The Town of Dumfries Building and Inspection Department handles building and trade permit applications online and performs inspections, including plumbing, mechanical, sanitary sewer and domestic water service. Prince William County's Building Development Division does not issue permits inside the town. Town Hall is at 17739 Main Street, (703) 221-3400. A water heater replacement, new fixture location, sewer line repair or water service line replacement should start there, and the plumber you're connected with can tell you what that particular job needs.
Water from the Occoquan
Prince William Water, formerly the Prince William County Service Authority, names Dumfries among the eastern and central Prince William households it supplies with Occoquan Reservoir water, treated at Fairfax Water's Frederick P. Griffith Jr. plant; the town lies in what the utility calls the Dumfries Pressure Zone. It describes its East and West systems as moderately hard, 61 to 120 mg/L, which is enough to leave some scale in water heaters over the years without being severe. Customer service is (703) 335-7950 on weekdays; emergency dispatch for main breaks and outages is (703) 335-7990; water quality questions go to 703-331-4162.
Sewer
Prince William Water also provides sewer service and has done main maintenance and lining in Williamstown; wastewater from eastern Prince William is treated at the H.L. Mooney facility. If your drains back up, the utility's dispatch line can check its side, and a clog or break in your own line is a job for a plumber. If you're not sure your property is on public sewer, your utility bill will show it.
Gas
Prince William County says Columbia Gas of Virginia and Washington Gas both operate in the county; the name on your gas bill tells you which serves your home. If you smell gas, leave the house first, then call 911 and your gas utility's emergency number from outside.
Seasonal problems
Winter freezes can split pipes in exterior walls and crawlspaces, and heavy summer storms test sump pumps and floor drains in homes with basements.
Dumfries compared with the District
In Washington, DC Water handles water and sewer and the DC Department of Buildings issues permits. In Dumfries, water and sewer come from Prince William Water while permits stay at Town Hall. Call with your street and the problem, and you will be connected with an independent plumber who sets price and timing with you.
Common questions in Dumfries
Who issues plumbing permits in Dumfries?
Who supplies water in Dumfries?
Is Dumfries water hard?
Which gas company serves Dumfries?
Nearby cities and towns
Sources
- Wikipedia: Dumfries, Virginia
- Town of Dumfries: Building and inspections
- Prince William Water: Water quality and supply FAQ
- Potomac Local: Maintenance crews turn attention to Dumfries sewer system
- Prince William Water: Water quality reports
- Prince William County Development Services: Areas we serve
- Prince William County annex, Northern Virginia Hazard Mitigation Plan (PDF)
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