The 1972 clean water act mandated an increase in the level of secondary treatment for sewage.
The Clean Water Act (CWA) establishes the fundamental framework for controlling pollution discharges into American waters and setting quality criteria for surface waters.
The Federal Water Pollution Control Act, which served as the foundation for the CWA, was passed in 1948; nevertheless, the Act underwent a considerable expansion and reorganization in 1972.
With modifications in 1972, "Clean Water Act" acquired the Act's common name.
Under the CWA, the EPA has put in place pollution management plans including regulating industrial effluent.
The EPA has also created guidelines for national water quality criteria for contaminants in surface waters.
Without a permit, it was against the law to discharge any pollutant from a point source into navigable waters under the CWA:
Hence, the 1972 clean water act mandated an increase in the level of secondary treatment for sewage in Boston.
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