Report a Water Main Break or Sewer Backup in DC

When a water main breaks under a District street or a sewer backs up into a basement, the first job is logistics: reach the right agency, on the right line, with the right information. This page is the reporting reference. It tells you exactly how to report a water main break or sewer backup in DC, what to say, who responds, and how the report ties into a later damage claim. It is not a cleanup or drying guide — for that, see the restoration how-to links at the foot.

The fast answer

To report a water main break or sewer backup in DC, call DC Water’s 24-hour Emergency Command Center at (202) 612-3400, or use the report-a-problem tool at dcwater.com/emergencies. Give the exact location and what you see. For street or storm-drain flooding not caused by a broken main, use 311 instead.

Who to call, by symptom

DC Water owns the public water mains and sewer mains. The 311 system (the Office of Unified Communications) handles street-level drainage and catch basins. Matching the symptom to the agency is the whole game — a misrouted call costs time while water keeps moving.

Use this lookup table when you are not sure who is responsible for what you are seeing:

How to recognize a water main break

A main break is not always obvious from a basement. The telltale signs are at street level and in your taps.

• Water surfacing in the road — clear or muddy water rising through cracks in the pavement, often steadily, even in dry weather.
• A pressure drop or no water at fixtures, sometimes across a block, not just one home.
• Discolored or rusty water when service returns, as sediment is disturbed.
• A depression, bulge, or sinkhole in the street, which means the break may be undermining the roadbed — a safety hazard.

If the water is clean and coming up in the street with no rain, a main break is the likely cause. Report it to DC Water even if a neighbor “probably already called” — multiple reports help crews pinpoint the location faster.

How to recognize a sewer backup

A sewer backup shows up inside the building, usually at the lowest point.

• Wastewater rising from a floor drain, toilet, or tub — often the basement floor drain first.
• A sewage or sulfur odor and gurgling drains throughout the house.
• Multiple fixtures backing up at once, which points to a blockage in the main line rather than a single clogged fixture.

The hard part is figuring out whether the blockage is in your private lateral (the pipe from your house to the public main, which is the property owner’s responsibility) or in the public sewer main (DC Water’s responsibility). You do not have to solve that before calling — report it to DC Water at (202) 612-3400 and a crew can check the public side.

What information to have ready

Whether you call (202) 612-3400 or use the online report-a-problem tool, the dispatcher needs the same handful of facts. Having them ready turns a five-minute call into a one-minute one.

1. Exact location. A street address, the nearest intersection, or a visible hydrant or manhole number. For a street break, describe which side of the street and roughly where on the block.
2. What you are seeing. “Water rising through the pavement,” “no water in the whole house,” “sewage coming up the basement floor drain.” Be concrete.
3. When it started. The time you first noticed it helps DC Water gauge how fast it is worsening.
4. A callback number. So the crew can reach you if they need access or more detail.
5. Whether anyone is at risk or property is actively flooding. Say so plainly — it affects priority.

Write down the time you reported it and any reference or confirmation number the system gives you. That timestamp is the anchor of your record if a claim follows.

Phone or online — which to use

Both reach DC Water, but they suit different situations.

• Call (202) 612-3400 when the problem is active and worsening — water gushing into a basement, a street break flooding the road, no water at all. A live dispatcher can prioritize and ask follow-ups, and the call is the fastest route for anything urgent.
• Use the online report-a-problem tool for conditions that are urgent but stable — a slow leak at the curb, discolored water that has not stopped, a catch basin you want logged — or when you want a written trail. The form lets you attach details and gives you a record without waiting on hold.

For a genuine emergency, call. The online tool is a complement, not a replacement, when seconds matter.

After you report: what happens next

For a water main break, DC Water dispatches a crew to locate and isolate the break by closing valves, then schedules the repair and any street restoration. Service may be interrupted on the block while they work, and a boil-water advisory can follow if pressure dropped enough to risk contamination — watch AlertDC and DC Water notices for that.

For a sewer backup, a crew checks the public main near your property. If the blockage is in the public line, DC Water clears it. If it is in your private lateral, the responsibility — and the plumber — is yours, and that repair may need a permit (see DC plumbing and gas permits).

Filing a claim against DC Water

If a public main break or a backup originating in the public sewer damaged your property, DC Water has a claims process. It is separate from reporting the emergency — reporting gets crews out; a claim seeks to recover for damage.

The general shape of a claim:

• Report promptly. Late notice weakens a claim. The emergency report you already made is step one.
• Document the damage. Date-stamped photos and video of the standing water, affected materials, and damaged contents, plus a written inventory.
• Keep the cause record. The reference number, the time, and what DC Water’s crew found (public-side vs. private-lateral) all matter.
• Submit the claim form through DC Water and follow its instructions and deadlines.

Whether a claim is paid depends on the facts and on legal standards that DC Water and the District apply — reporting and documenting does not guarantee payment, but skipping them almost guarantees denial. Your own coverage may also apply: standard homeowners and renters policies treat sudden internal water differently from surface flooding, which falls under the NFIP. The distinction is laid out in flood insurance in DC.

Public main vs. private lateral — why it decides everything

The single fact that drives both who fixes the pipe and who pays is where the failure sits. The public main in the street and the public sewer main are DC Water’s. The service line and private lateral running from the curb to your house are the property owner’s. A break or blockage on the public side is DC Water’s responsibility to repair, and is the situation in which a claim against the utility makes sense. A failure on your private lateral is your repair and your insurer’s question — not a DC Water claim.

You rarely know which side failed at the moment water is coming up. That is fine. Report it, let DC Water’s crew determine the boundary, and record what they find. That finding — public-side or private — is the hinge of everything that follows.

Why DC basements back up so often

A large share of sewer backups in the older core of the District trace to the combined sewer system, where stormwater and household sewage share the same pipes. In heavy rain those pipes can fill faster than they drain and force water back up the lowest fixtures. DC Water and the Department of Energy and Environment run long-term projects — including large storage tunnels — to reduce these combined sewer overflows, but during an intense storm the risk is real for low-lying and basement-level spaces.

Knowing this helps with reporting: after a downpour, a basement backup may be a system-wide event rather than a problem unique to your line. Reporting it still matters, and so does signing up for AlertDC so you get flood warnings before the next storm.

Reporting checklist

• Confirmed the scene is safe — no electrical or gas hazard; 911 if life is at risk
• Identified the symptom — main break, sewer backup, or street/storm flooding
• Called the right line — DC Water (202) 612-3400 or 311
• Gave exact location, symptoms, start time, and a callback number
• Recorded the time reported and the reference/confirmation number
• Photographed and documented the damage before cleanup
• Noted whether the cause is public-side or your private lateral
• Started a claim with DC Water and/or notified your insurer if there is damage
• Verified any plumber’s DC license on Scout before repairs

Where to go next

• The full contact directory with hours and links: DC water emergency contacts
• The broader response sequence: first-24-hours logistics checklist
• Repair permits for the fix: DC plumbing and gas permits
• The insurance question: flood insurance in DC (NFIP)
• Check the trade is licensed: verify a DC contractor’s license