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Extra resources for Municipal wastewater treatment: evaluating improvements in national water quality
Consequently, a number of tools have been applied in an attempt to measure the success of water pollution control efforts. , 1993). • Reporting on the number of POTWs built or upgraded, population served by various treatment levels, effluent loading rates, and other trends in the construction and use of wastewater infrastructure (USEPA, 1997b). , reports prepared by states to comply with CWA section 305(b), USEPA’s 305(b) summary reports to Congress) (ASIWPCA, 1984; USEPA, 1995a, 1995b). , 1992).
Source: Dunne and Leopold, 1978. age or other pollution sources enter the water and the decomposer population (especially bacteria) explodes in response. These organisms have the potential to lower, or even completely exhaust, oxygen in the water. When this occurs, life that depends on the presence of oxygen (aerobic) in the waterbody dies or, where possible, the biota moves on to waters with higher oxygen levels. In the absence of oxygen in water, anaerobic bacteria further break down organic matter.
Truman) and Representative Fred M. Vinson (later Chief Justice of the Supreme Court), actually made it to President Roosevelt’s desk. The bill, however, received a presidential veto in 1938 because of budgetary concerns. The 80th Congress finally broke the impasse and enacted the Water Pollution Control Act of 1948. This act, along with five amendments passed between 1956 and 1970, shaped the national vision and defined the federal role regarding the treatment of wastewater in the United States.