In Cities: Skylines, sewage can be backlogged when sewage disposal facilities are non-existent, not operational, or of insufficient capacity.
Here’s a list of things to check so you can fix your sewage problem before people start walking or get sick:
Task #1: Build a drain pipe
The first way the drainage is secured is that there is no sanitation facility at all – either because the player forgot or didn’t know it was needed.
If you don’t already have one, build one from the water menu.
Make sure you place it downstream from your water intake pumps or the sewage it spews out will contaminate the water supply and sicken your citizens!
Task #2: Make sure your drainage system is connected and working
Another common reason for backed-up sewage is the improperly functioning sewage system.
Your drain pipe needs electricity to work, so don’t forget to plug it into your mains supply.
Also, make sure you have properly connected the drain pipe to your city’s water supply system. If this is not the case, a broken pipe icon will be displayed. It will also be gray instead of cyan when you view it in the water info view.
Task #3: Check Sewage Capacity (And Build More Facilities If Necessary)
If you have working drains but are still backing up wastewater, your drain capacity may not be sufficient.
Click the water drop icon in the info view panel or build menu to view the water availability and sanitation capacity information.
Note that if you previously reduced your water and wastewater budget to save on maintenance costs, your wastewater capacity will have a direct impact. If that’s the case, you might just need to increase your budget again.
Otherwise, it’s time to build additional drainpipes to keep up with demand.
As your city grows, you may want to look for larger-capacity sewage treatment plants. The sewage buildings that come from DLCs have additional benefits, e.g. B. that they are less harmful to the environment or do not have to discharge into a body of water.
https://www.fandomspot.com/cities-skylines-sewage-backup/ How to stop sewage backlogs in cities: Skylines – FandomSpot