MSD sewer backup program: how Cincinnati homeowners use it

In July 2026, two heavy storms four days apart pushed water up through basement floor drains across the Metropolitan Sewer District's service area, and MSD received more than 1,500 reports of possible sewer backups. If your basement was one of them, or could be next time, it helps to know the program that pays for professional cleanup when the public sewer is at fault. Here is how it works, what it covers, and how to tell whether the water in your basement even qualifies.

First, is it a sewer backup or groundwater?

The program only covers water that comes out of the public sewer. So the first question is physical, not legal: where did the water come from?

• Backup signs: water rising from a floor drain, a basement toilet or shower, or a laundry standpipe; gray or brown water with a sewage odor; a ring of debris around the drain once it recedes.
• Seepage signs: clear water along the base of the walls, at a crack, or across the floor away from any drain; damp block with a white mineral crust; water that appears hours after the rain stops, as the soil around the house saturates.

Plenty of Cincinnati basements get both in the same storm. The sewer program handles the first. The second is a groundwater problem no sewer claim will fix. Our answer on floor drain water during heavy rain goes deeper on telling them apart.

Photograph where the water is coming from before you start mopping. That one photo does more for a claim than anything you write later.

The Sewer Backup program in plain terms

MSD has run its Sewer Backup (SBU) program since January 2004 under a federal consent decree. MSD serves 43 of the 49 communities in Hamilton County plus small parts of Butler, Clermont, and Warren counties, so if you live in Hamilton County you are very likely inside it. Check your sewer bill if you are unsure. The program:

• Investigates reported backups to decide whether the cause was in the public sewer, such as too little capacity during a storm, or on private property.
• Cleans eligible properties at no charge through professional cleaning crews MSD authorizes. The work is limited to areas and items inside the building that the backup affected.
• Reimburses approved damages, including the depreciated value of personal property and replacement of structural items such as flooring, drywall, and mechanicals.
• Prevents repeat backups at qualifying properties with a device installed at no cost.

The 48-hour rule and the other deadlines

This is where people lose eligibility:

• Report the backup to MSD within 48 hours of discovering it to remain potentially eligible for reimbursement. MSD takes reports around the clock at (513) 352-4900 or online at msdgc.org/sbu.
• File a claim within 2 years of the backup date.
• Expect a written decision, in most cases, within 60 days of MSD receiving a complete claim.

A complete claim includes the signed claim form, your private insurance information (MSD notes Ohio law requires it), and an inventory of the damage with photos, estimates, invoices, and receipts where you have them.

Report first, even if you are not sure it was a backup. A report costs nothing. Missing the 48-hour window can cost the claim.

What the program does not cover

MSD is explicit about exclusions, and they catch a lot of homeowners:

• Water from your own private building sewer, the pipe between your house and the public main. Roots, grease, a collapsed line, or a clog there is the owner's responsibility.
• Overland flooding, meaning surface water coming in through doors, window wells, or walls. MSD does not treat that as a backup.
• Damage to anything outside the building, and lost wages, rent, or income.
• Plumber bills for work on private sewers or internal plumbing.
• Do-it-yourself cleanup. If you clean without a professional cleaning contractor, MSD does not reimburse that effort, and hiring your own cleaner instead of MSD's does not guarantee reimbursement.

If it keeps happening: the Prevention Program

A property that has had two or more backups from the MSD public sewer within five years because of inadequate capacity may qualify for a backup prevention device installed at no cost. MSD lists two possible solutions: a backflow prevention device or a wastewater pump system. Three strings come with it:

• If the device runs on electricity, you supply and pay for the power.
• MSD may inspect it periodically, and you are expected to call MSD right away if its alarm sounds and to cut back on water use until it is cleared.
• You sign a covenant and agreement that is recorded on the deed and binds future owners.

To start, request an eligibility questionnaire from the Prevention Program Office at (513) 244-5100.

Northern Kentucky works differently

Across the river, Covington, Newport, and the rest of Boone, Kenton, and Campbell counties are served by Sanitation District No. 1. SD1's Backup Assistance Program offers up to $10,000 per approved property toward a backflow preventer or a similar backup solution, installed by a licensed plumber you choose. It is aimed at properties that have had a wet-weather backup or sit in an area with a known capacity problem. SD1 takes calls at 859-578-7450, option 1.

Where waterproofing fits

A backflow device keeps sewer water from coming up your drain. It does nothing about groundwater pushing through the walls. And if a sump happens to be piped into the house drain instead of outdoors, a closed backflow valve leaves that sump water with nowhere to go. So if your basement had both problems in July, treat them as two jobs: the sewer side through MSD or SD1, and the seepage side with a sump system that discharges outside and, where the walls take water, interior drainage.

MSD's own prevention tips point the same way: clean gutters, regrade the yard away from the house, and consider a sump pump with a battery backup to move groundwater away from the foundation.

If you are not sure which kind of water you had, walk through our basement water diagnosis, then call or text us. We can tell you whether you are looking at a sewer claim, a waterproofing job, or both, and which to handle first.