Storm water, rainwater, or groundwater should not be drained into which type of system?

The correct answer identifies that storm water, rainwater, or groundwater should not be drained into a sewer system. Sewer systems are designed to handle wastewater from residential or commercial properties, which includes sewage and greywater. They typically cannot manage large volumes of storm water or rainwater, as these systems can become overloaded during heavy rains, leading to potential backflows and sewer overflows.

Draining excess water into a sewer system can cause significant issues, including backups in the plumbing or local flooding. Sewer systems are not suitable for managing the runoff from precipitation as they lack the capacity and design to handle such surges in volume and can easily become compromised when subjected to storm-related inflows.

Other systems, like storm water systems, are specifically designed to manage and direct excess rainwater away from buildings and grounds, while drainage systems may have the capacity for various types of water, including the drainage of rainwater. Septic systems are designed for treating sewage, but they also need to avoid excess water from sources like storm water to function properly.