Areas we serve · Potomac, MD service area
Areas We Serve Around Potomac, MD: Montgomery County Towns and Nearby Virginia
Twenty-four towns and neighborhoods, each with its own page. Find yours, check the ZIP codes and call.
Towns and neighborhoods near Potomac we serve
We serve Potomac, Maryland first, and the pages below follow the places people actually call from. Some are Maryland towns that share WSSC water and sewer. Seven are Virginia towns inside about 10 miles, where Fairfax County sets different rules for sewer backups and permits. One is a Washington, DC neighborhood, where DC Water and the District set the rules.
Every place here has its own page with local facts, a map and the questions that matter for that address.
Potomac neighborhoods
Maryland towns
- North Potomac, MD
- Rockville, MD
- Bethesda, MD
- North Bethesda, MD
- Gaithersburg, MD
- Redland, MD
- Aspen Hill, MD
- Wheaton, MD
- Silver Spring, MD
- Travilah, MD
- Cabin John, MD
- Glen Hills, MD
Virginia towns within 10 miles
Washington, DC neighborhood
ZIP codes covered for calls to this number
- 20854
- 20859
Not sure you are in range?
Call with your ZIP code and street address, and we confirm whether it can send a plumber. Call (301) 872-7756
Schematic map, not to scale; positions approximate.
Sewer and permit rules change at the Potomac River
In Maryland, WSSC is the water and sewer utility and the permit authority for plumbing. It says the owner maintains the sewer service from the property line to the building, and its emergency line is 301-206-4002.
In Virginia, Fairfax County says to call it before a plumber when you think a sewer backup is in the county main. The 24-hour line is 703-323-1211. Gas water heater replacements need a county permit, even like-for-like. The Town of Vienna runs its own water service and has its own urgent line.
The area pages spell out which rule applies where. Start with fixing a damaged sewer lateral if a backup is the problem.
Four places that need a note before you call
- Glen Hills, MD: most homes use wells and septic, which this site does not service, so the page explains where a plumber's work stops.
- Cabin John, MD: its ZIP codes are 20818, 20817 and 20812, so give your street address and we confirm.
- Great Falls, VA: much of its land lies outside the county sewer area, so septic and well work is out of scope.
- Vienna, VA: the Town runs water and most sewer mains, while Fairfax County handles plumbing permits.
Each of those pages explains the point in full and links back here.
Service area questions for Potomac-area callers
Which ZIP codes do you serve?
Calls to this number cover ZIP codes 20854 and 20859. Several places on this page use other ZIP codes, so give your street address and ZIP code and we tell you whether we can send a plumber.
Why do Virginia towns have different advice from Maryland ones?
Fairfax County asks you to call it first about a suspected sewer main backup, while in Maryland the owner maintains the sewer service from the property line to the building and WSSC handles the main. Each area page explains the rule that applies there.
My town is not listed. Can I still call?
Yes. Give your street address and ZIP code, and we confirm whether a plumber can reach you.
Water on the floor in your town?
Close the nearest shutoff and call with your ZIP code. We tell you whether we can send a plumber.