In an Upper Marlboro plumbing emergency, shut off the main water valve, or the well pump if your home has one, and leave the house if you smell gas. Most Upper Marlboro addresses lie outside the small county-seat town, in a large area where WSSC Water serves many homes but service varies by address. Call the number on this page to be connected with a local plumber in Upper Marlboro.

The incorporated Town of Upper Marlboro, the Prince George's County seat, is home to only a few hundred residents, but the Upper Marlboro mailing area covers about 77 square miles. It mixes horse-farm countryside with growing developments around Westphalia, Brock Hall and the US 301 and MD 4 corridors. The median home, in the area city-stats reports, was built in 1982. WSSC Water runs mains in the area, while outlying rural parts of the postal area may be set up differently.
Do this now
- Stop the water. Close the main valve where the line enters the house. On a private well, switch off the pump at its breaker.
- Protect the water heater. If it's leaking, close its cold supply and turn off the gas or power.
- Leave for a gas smell. Get outside, then call 911 and your gas utility, using the emergency number on your gas bill. Homes on propane call their propane supplier.
- Report street problems. For WSSC customers, main breaks and sewer overflows go to 301-206-4002.
- Limit drain use. During a backup, stop flushing, showers and laundry.
- Photograph the damage. Pictures help with any insurance claim.
- Clear the way. Open gates, tie up dogs and note where the well, cleanout or meter sits so the plumber can find them quickly on a large lot.
Signs and likely causes
| Sign | Likely cause |
|---|---|
| No water, and you're on a well | Pump, pressure switch or power problem |
| No water, and you're on WSSC | Main break or a closed or failed valve |
| Basement drain overflowing after a storm | Blocked or overloaded sewer line, or a failed sump pump |
| Water heater dripping from the base | Tank failure |
| Wet ground along the water line route | Leak in the service line on your property |
Cost factors
- The hour. Nights and weekends usually cost more than a scheduled weekday visit.
- How long the water ran. A leak found quickly is a plumbing repair; one that ran for hours may also need drying work by others.
- Distance and lot size. Long service lines and rural properties take longer to trace.
- System type. Well pumps, pressure tanks and private onsite systems are different jobs from a public-water repair.
- Permits. The Town links to county DPIE for building permits, and WSSC Water issues all plumbing permits in the county. Water heater replacements need one, and gas water heater swaps require a qualified gasfitter.
Emergency Plumber questions in Upper Marlboro
How do I find out which water utility serves my address?
Which gas company serves my home, and which number do I call?
Does an emergency water heater replacement need a permit here?
Our home may be on a well or not on municipal sewer. Who helps in an emergency?
More plumbing services in Upper Marlboro
Emergency Plumber nearby
Helpful guides
Sources
- WSSC Water: water main work in Upper Marlboro
- Prince George's County DPIE: residential plumbing permits
- WSSC Water 2025 Water Quality Report (customer service and emergency lines)
- WSSC Water Permit Services: information for homeowners
- Upper Marlboro, Maryland (Wikipedia)
- Upper Marlboro housing by year built (city-stats.com)
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