Q.Is there county help paying for a backwater valve or other flood fixes?

A.A backwater valve rebate in Maryland is hard to find. As of October 2026 the help we found is run by Baltimore City and Rockville, plus two DC programs; Montgomery County says it has none.

Here's the honest picture: the money is local, narrow and mostly city-run. If you live in Baltimore City or inside Rockville's city limits, there's real help. If you live in Washington, D.C., there are two programs. Elsewhere in the area, the county pages we searched turned up nothing.

That doesn't mean you're out of options. It means the planning, and usually the bill, falls to you, your insurer, or the utility if its pipe caused the trouble.

Which programs are open as of October 2026?

Four programs publish a dollar ceiling. The chart shows the most each one pays.

• Baltimore City backup reimbursement (City only)5000 dollars
• Rockville flood mitigation match (Rockville only)5000 dollars
• Rockville sewer backup claims policy (Rockville only)2500 dollars
• DC Water backwater valve rebate (DC only)6000 dollars

Chart drawn from: Baltimore City DPW, City of Rockville, DC Water

The largest number belongs to DC, and it's the narrowest. DC Water's rebate pays up to $6,000 toward buying and installing a backwater valve, but only where a backup during one of two storms (July 1, 2012, or September 10, 2020) was documented. It's for D.C. addresses, not Maryland.

What does Baltimore City pay for?

Baltimore's Expedited Reimbursement offers as much as $5,000 for each dwelling unit and each event, covering documented cleanup, disinfection and disposal when a rain-driven backup overwhelms City sewer capacity. Its page sets the qualifying rainfall at half an inch or more within 24 hours. Applications must arrive within 90 days, insured residents need their insurer's final decision first, and property damage isn't covered.

The City's SOS Cleanup Program sends a free cleanup crew instead of a check. On October 28, 2026, the Mayor's office expanded it to some dry-weather backups, when the clog sits in the part of the sewer lateral the City owns. A single backup can get help from SOS or from reimbursement, never both, and either way you start with 311. The two use different rain thresholds, so confirm with 311.

Both are City of Baltimore programs. A Baltimore County address doesn't qualify.

Does Rockville help with a backwater valve?

Rockville runs the closest thing to a fix-it fund. Its Flood Mitigation Assistance Program, as described in the City of Rockville application instructions, reimburses up to 50% of approved flood-proofing costs, capped at $5,000, for properties inside city limits. The listed practices include sump pumps and backup systems, drain tile, and plugging interior floor drains. Applications are rolling, first come, first served.

The instructions we read don't name backwater valves, so ask the City before you count on it. Separately, Rockville's claims policy may cover as much as $2,500 of cleanup costs or a deductible when a City sewer or water main is to blame.

What about Montgomery County and the other counties?

Montgomery County says it doesn't have a financial assistance program like Rockville's, though it will look into one. For Baltimore, Frederick, Howard, Anne Arundel and Prince George's counties, plus Annapolis and Takoma Park, we found no county program on their official pages. That's what our search found, not a statement from the agencies, so a quick call to your county's public works office is worth it.

DOEE's FloodSmart Homes pilot gives D.C. homes a free assessment, serving the 100- and 500-year floodplain first, and lists sump pumps and sewer backflow valves among its upgrade types.

If there's no program, how do you pay for it?

Paying for a backwater valve without a rebate

1. Read your homeowners policy; if it lacks backup coverage, ask your agent to add it.
2. If the utility's pipe or roots caused a backup, file a claim with the utility.
3. Get a licensed plumber to confirm a valve is right for your drain layout.
4. Make sure the quote includes the permit, the access cover and inspection.
5. Ask your county or city public works office whether anything new has opened.

Insurance is the other half of the money question; the sewer backup insurance answer explains the endorsement. For whether a valve suits your house at all, see should we get a backwater valve, and for the split between your pipe and the utility's, who pays when the sewer backs up. Already had a backup? Start with cleaning up safely.

The bottom line

As of October 2026, help paying for flood fixes is a city matter: Baltimore City and Rockville in Maryland, plus two D.C. programs. Montgomery County says it has none, and we found no county program in the other five counties. Budget the work yourself, and check back with your county.

Readers also ask

Can Baltimore County residents use Baltimore City's backup programs?

No. Both the reimbursement program and SOS Cleanup are City of Baltimore programs for City residents.

Is DC Water's rebate open to Maryland homes served by WSSC?

No. It covers D.C. properties only, and only those whose backup in the 2012 or 2020 storm is on record.

Does Rockville's program pay for a battery backup sump pump?

Its instructions list sump pumps and sump pump backup systems among eligible practices. Our page on battery backup sump pumps covers the choice.

Can we get both SOS Cleanup and reimbursement for one backup?

No. Baltimore City says residents may get help from one program, not both, for the same backup.

Does Montgomery County plan a program?

The county says it doesn't have one like Rockville's but will investigate the idea. Check its flooding page for updates.