Glossary


Secondary Treatmentsearch for term
Technology-based requirements for direct discharging municipal sewage treatment facilities. Standard is based on a combination of physical and biological processes for the treatment of pollutants in municipal sewage. Standards are expressed as a minimum level of effluent quality in terms of: BOD5, suspended solids, and pH (except as provided for special considerations and treatment equivalent to secondary treatment). [Report to Congress: Impacts and Control of CSOs and SSOs, US (EPA 2004, pg. GL-4; ) [CWA 301(b) and 40 CFR 125.3]