2024年9月16日 · Welcome to EPA’s combined sewer overflow (CSO) program website! Find where CSO outfalls are located across the U.S. and access information about each CSO …

2025年3月10日 · EPA's Combined Sewer Overflow (CSO) Control Policy (pdf) (1.48 MB) provides guidance on how communities with CSOs can achieve Clean Water Act goals in a flexible, cost-effective manner. The CSO Control Policy also defines expectations for regulated communities, state water quality standards authorities, and NPDES permitting authorities.

2024年9月16日 · To understand combined sewer overflows (CSOs), we first need to know how sewer systems work. Most U.S. communities today have separate sanitary sewer systems. In …

Combined Sewer Overflow (CSO) is when untreated or partially treated combined wastewater discharges from an outfall directly to nearby streams, rivers, and other water bodies.

Storage facilities have been used extensively for Combined Sewer Overflow (CSO) mitigation (Urbonas and Stahre, 1993; Field, 1997). Specific CSO retention methods include underground storage (e.g., tunnels), in-receiving water storage, and retention basins (RBs). RBs may be built in-line or off-line.

2020年7月2日 · Combined sewer overflows (CSOs) were developed as overflow valves to reduce the risk of sewage backing up during heavy rainfall. Overflows of diluted sewage during...

Combined sewer overflows (CSOs) are a priority water pollution concern because they discharge a combination of stormwater, untreated human and industrial waste, and other stormwater pollutants into our waterways.

1994年4月19日 · Combined sewer overflows (CSOs) contain not only storm water but also untreated human and industrial waste, toxic materials, and floating debris. They are cause beach closings, shellfishing restrictions, and other water body impairments. CSOs and other “wet weather” pollution sources cause about half of the estuary contamination nationwide.

2024年4月16日 · According to the United States Environmental Protection Agency (EPA), combined sewer overflows, often referred to as CSOs, happen when the amount of runoff exceeds the capacity of the system and untreated storm …

Combined sewer systems (CSSs) are wastewater collection systems designed to carry both sanitary sewage and storm water runoff in a single pipe to a wastewater treatment plant. CSOs generally occur during wet weather periods when the hydraulic capacit y …