What best practices can be implemented to reduce stormwater inflow?

Utilizing green infrastructure and enforcing regulations on drain connections is an effective best practice for reducing stormwater inflow. Green infrastructure involves sustainable practices such as rain gardens, permeable pavements, and green roofs that help absorb and manage rainwater where it falls, promoting groundwater recharge and minimizing runoff. These methods can significantly decrease the volume of stormwater entering the collection system, thereby mitigating issues such as flooding and overflow.

Enforcing regulations on drain connections is equally important, as improper connections can lead to stormwater being directed into sanitary sewers, which overwhelms the system during heavy rains. By ensuring that all drain connections are proper and in compliance with local regulations, the risk of excessive stormwater inflow can be greatly reduced.

The other options do not promote effective practices for reducing stormwater inflow, as encouraging car washing in the street would increase pollutants being washed into storm drains, and adding more drainage systems without proper regulations could lead to inadequate management of water flows. Reducing the frequency of sewer maintenance can lead to blockages and failures in the system, further exacerbating stormwater issues.