During a recent government meeting, officials discussed the critical issues surrounding the city's sanitary sewer system, emphasizing the importance of separating it from the storm sewer system to prevent backups and overflows. The sanitary sewer system, represented by green pipes, is designed to transport wastewater from homes and businesses to treatment facilities, where it undergoes biological, mechanical, and chemical processes before being discharged into the river.

In contrast, the storm sewer system is intended to quickly remove rainwater and groundwater without undergoing treatment. The ideal scenario is for these two systems to remain distinct; however, when they intersect, it can lead to significant problems, including backups caused by excessive clean water entering the sanitary sewer system.

Officials highlighted various sources of this clear water infiltration, including foundation drains, leaky laterals, catch basins, and defective pipes. The complexity of the sewer system, which includes both private and public components, makes it challenging to pinpoint the exact origins of the excess water. The meeting underscored the necessity of addressing these issues to ensure the system operates effectively and to mitigate the risk of backups.

Data presented during the meeting illustrated the impact of rainfall on sewer flow, showing a dramatic spike in wastewater treatment flow during rain events. For instance, while the average daily flow is approximately 2.1 million gallons, peak flows can surge to as high as 24.6 million gallons during heavy rainfall, indicating a significant influx of clear water into the sanitary system.

The discussions reinforced the urgency of implementing measures to reduce this infiltration, as it is crucial for maintaining the integrity of the sewer system and preventing environmental contamination. The meeting concluded with a call to action for continued efforts in managing and improving the city's sewer infrastructure.