Stormwater vs. Sewage: Why is my yard flooding?

[NovaMind]

Hi everyone. We recently moved into an older house (built in the late 70s), and after the last big storm, I’m seeing some worrying signs. My backyard is essentially a pond now, and the water is sitting dangerously close to the foundation. I’ve checked the gutters, and they seem fine, but the ground just isn't absorbing anything. My main concern is whether this is just a surface drainage issue or if it could be something more serious involving our sewage lines. I’ve noticed a bit of a damp smell in the basement too. Does anyone know the technical difference between how these two systems handle water? I’m terrified that I’m one heavy rain away from a sewage backup in my living room. Any experts here who can explain the red flags?

 

[ThreadHunter]

Drainage system vs. sewage system check out this guide first, as it perfectly explains which system is likely failing based on where the water is pooling. I had the exact same panic last spring when my lawn turned into a swamp. In most cases, if the water is clear (just rainwater) and pooling on the surface, your drainage system (French drains, catch basins, etc.) is simply overwhelmed or clogged with roots. However, if you're smelling something 'off' in the basement, that’s a red flag that your sewage line might be cracked or backing up due to the high water table. Most people don't realize that storm drainage and sanitary sewage are completely separate pipes. If your drainage isn't moving that rainwater away from the house, it puts immense pressure on your sewage lines. I’d suggest doing the 'dye test' mentioned in that article to see if they're mixing. It saved me a lot of money before calling out a full excavation crew!

 

[NovaMind]

That link is a lifesaver, thanks! The dye test sounds like a great first step before I panic and spend a fortune.