Government Regulations for Aquatic Pollution Control

	Purpose of the Clean Water Act
	History of "Clean Water Act"

	Water Pollution Control Act, 1948
	Federal Water Pollution Control Act, 1972
	Clean Water Act, 1977
	Water Quality Act, 1987
	Results of Clean Water Act

National Pollutant Discharge Elimination System Three main permit categories: general, municipal, industrial

	WET (Whole Effluent Toxicity)
	Rationale for WET tests
	Two basic types of WET tests: acute and chronic

	Acute toxcity tests -- 96 hours or less -- determine lethal toxicity
	Chronic toxicity tests -- 7 days -- measure sub-lethal toxicity

	LC50
	NOEC (no observed effect concentration)
	LOEC (lowest observed effect concentration)
	IC (inhibition concentration)