Flashcards in Chapter 11 Water Pollution Deck (23)
What is point source?
“any single identifiable source of pollution from which pollutants are discharged, such as a pipe, ditch, ship or factory smokestack” Factories and sewage treatment plants are two common types of point sources.
What is a non-point source?
comes from areas such as farmlands where chemical are used, drain into ground or surface water, other sources are pastures, barnyards, construction sites, homes, streets, lawns.
the increase in concentration of a chemical substance in a food web as it passes from lower levels to highest levels.
Easier to identify
Toxic organic chemicals
Oxygen-demanding organic wastes
Buries nooks & shelters
Interferes with navigation
Damages hydro dams
Nitrates and phosphates
BPA (plasticizer), DDT, PCB
Fuel storage tanks
Toxic Organic Compounds
Pollution of Oceans
the nutrient enrichment of aquatic ecosystems, occurs naturally as a lake or river ages over long periods
characterized by moderate levels of nutrients, lakes good for fishing boating swimming
clear lake waters surrounded by pine snd spruce forest clear because of scarcity of suspended algae resulting from the low levels of nutrients
Established the basic structure for regulating pollutant discharges into the waters of the United States. Gave EPA the authority to implement pollution control programs such as setting wastewater standards for industry
water pollution control act 1972
federal law that regulates the discharge of pollutants into the nation's surface waters, including lakes, rivers, streams, wetlands, and coastal areas. Passed in 1972 and amended in 1977 and 1987, originally known as the Federal Water Pollution Control Act.
Clean Water Act 1977
was established to protect the quality of drinking water in the U.S. This law focuses on all waters actually or potentially designed for drinking use, whether from above ground or underground sources
Safe Drinking Water Act 1974
types of sewage treatment and disposal
treatment plant that physically removes solids from the wastewater
primary treatment plant
rely on aerobic bacteria to break down degradable organic materials- activated sludge process, trickling filter
secondary treatment plant
most advanced form of water treatment designed to remove most of the remaining pollutants notably the nitrates and phopshates
tertiary treatment plant
heavy metal pollutatnts