State guide

Maryland

Maryland has a mixed picture by utility area. In WSSC territory, the official rule is unusually owner-heavy: WSSC maintains only the tap, and all service pipe length is considered the property owner’s responsibility; Baltimore City materials instead place homeowner responsibility to the property line or cleanout and show the city on the public side.

Checked against official sources on October 4, 2026. Rules and links change; confirm with the office listed before you act.

Try a ZIP like 30303, “Travis County” or “Columbus, OH”

Who usually owns the sewer lateral: Usually the owner is responsible for the private sewer service line to the property line or cleanout, but in WSSC territory the official rule is broader: WSSC maintains only the tap and all service pipe length is the property owner’s responsibility.
State agency: Local utilities and local permit authorities control sewer service-line work; for on-site system property-transfer inspections, Maryland Department of the Environment and the State Board of On-Site Wastewater Professionals administer licensing.
Permits for repair or replacement: WSSC says permit services and ePermitting are used for service-connection work, and Baltimore’s water and wastewater regulations require a written DPW-approved agreement for installation, renewal, modification, relocation, or abandonment of sanitary sewer connections.
Inspection at sale: Maryland’s statewide property-transfer inspection licensing rules cover on-site sewage disposal systems; I did not find a statewide public-sewer lateral inspection-at-sale requirement on the official pages reviewed.
Assistance programs: WSSC offers the PipeER loan program for residential water or sewer service line replacement and sewer diagnostics; Baltimore City also publishes optional HomeServe exterior line coverage and DPW sewage-backup cleanup or reimbursement programs.

Official resources in Maryland

WSSC Water - Service Connections on Private Property

Explains service-connection design and states what WSSC maintains versus what the property owner must build and maintain.

WSSC Water - PipeER: Water or Sewer Service Line Emergency Replacement Loan Program

Official WSSC emergency loan program for qualifying residential water or sewer service line replacement and sewer diagnostics.

Maryland Department of the Environment - On-site Sewage Disposal System Property Transfer Inspectors

State page for licensing and rules for property-transfer inspections of on-site sewage disposal systems.

COMAR 26.31.01.03 - Licensure

State regulation stating that, after June 30, 2025, on-site sewage disposal system property-transfer inspectors must be licensed.

Key facts for Maryland

WSSC says it maintains the tap only; all service pipe length is considered the property owner’s responsibility.
For a single-family house in WSSC right-of-way, the master plumber exposes the WSSC main and calls WSSC to provide the sewer main tap and saddle.
WSSC’s PipeER program includes sewer pipes and diagnostic actions as of July 1, 2024.
Baltimore City’s brochure says exterior sewer service lines from the house to the property line or cleanout are the homeowner’s responsibility.
Baltimore DPW maintains a lateral corrective action program for collection-system laterals and can prioritize repairs after recurring building backups.
Maryland’s property-transfer inspection licensing rules apply to on-site sewage disposal systems, not public sewer laterals.

City sewer lateral rules and programs in Maryland

City	city	phone	Details
WSSC Water - Customer Service / Permit Services Prince George's County	Laurel	301-206-4001	Main customer line on WSSC’s service-connection page; permit services are listed there with ePermitting information.
WSSC Water - Permit Services Prince George's County	Laurel	301-206-4003	Permit Services hours are listed on the PipeER page as Monday-Friday, 7 a.m.-4 p.m. except Wednesdays, 7 a.m.- Noon.
WSSC Water - PipeER Program / WSSC Federal Credit Union Prince George's County	Laurel	240.459.8022	Official WSSC page directs customers here to begin the PipeER application process.
WSSC Water - Claims Department Prince George's County	Laurel	301-206-7095	Claims line for possible reimbursement when a WSSC pipe or roots caused the issue.
Maryland Department of the Environment - On-Site Systems Division Baltimore City	Baltimore	(410) 537-3778	Contact listed for questions about on-site sewage disposal system property-transfer inspections.

* Not published: the official page doesn't list it. Call the office to confirm before you rely on it.

What to do next

First identify your utility area: WSSC and Baltimore City publish different responsibility splits, so the answer depends on where the property is served.
Before paying for a sewer replacement in WSSC territory, check whether you qualify for PipeER financing and whether a claim is possible for a public-side cause.
If the property uses septic instead of public sewer, confirm whether a licensed Maryland property-transfer inspection is needed for the transaction.

Not seeing your city or county?

We list a city only when an official government page publishes its rules. If yours isn't in the table above, it may not publish them online yet. Here's what to use instead, in order:

General Start with the statewide information above. It applies across Maryland, but cities and counties can add their own steps, fees or deadlines.
Closest verified Nearest places where we have verified local data outside this state (distance from Maryland's population center, for comparison only):
- DC Water - Permit Operations, District of Columbia · about 19 miles
- DC Water - Water and Sewer Emergency Number, District of Columbia · about 19 miles
- District Department of Buildings, District of Columbia · about 19 miles
Call to confirm Ask the official office. They have the current local rule, fee and form.
WSSC Water - Service Connections on Private Property
Website →
Phone: (301) 206-4001 (as listed on that page, checked Oct 4, 2026)
Your city or county office: Local governments →
Not sure who handles it locally? USAGov's free help line, 1-844-872-4681, or the Maryland page on USA.gov can point you to the right office.
Know the current info? Tell us and include a link to the official page. We check every tip before it goes up.

Helpful guides

Sewer lateral responsibility check →

Do you serve Maryland? Get a featured listing for $30/month, clearly labeled as a paid placement.