Civil Engineering Professional Engineer Practice Exam 2025 - Free PE Practice Questions and Study Guide

The primary function of a storm sewer system is to collect and convey rainwater and runoff away from urban areas. These systems are designed to handle excess water from rainfall or melting snow, preventing flooding and water accumulation that could damage infrastructure, homes, or public spaces. By efficiently channeling stormwater away from developed areas, storm sewers help maintain the integrity of roadways, buildings, and other structures, in addition to protecting water quality in nearby natural water bodies by minimizing the surface runoff that could carry pollutants.

Storm sewer systems are typically separate from sanitary sewer systems, which are specifically designed for household wastewater, indicating a clear distinction in their functions. While some might consider flood management important, the primary role of a storm sewer is focused on the immediate removal and conveyance of surface water, rather than broader flood risk management strategies, particularly in rural areas where land drainage conditions differ.