How are water quality standards determined? Distinguish between water quality criteria pollutants and maximum contaminant levels
What will be an ideal response?
"On the basis of the latest scientific knowledge, the EPA has listed 158 chemicals and substances as criteria pollutants. The majority of these are toxic chemicals, but many are also natural chemicals or conditions that describe the state of water. The list identifies the pollutant and then recommends concentrations for freshwater, saltwater, and human consumption."
"Drinking water standards are stricter. For these, the EPA has established the Drinking Water Standards and Health Advisories, a set of tables that are updated periodically. These standards, covering some 90 contaminants, are enforceable under the authority of the Safe Drinking Water Act. They are present as maximum contaminant levels."
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a. mT b. cT c. mP d. cP
Mineral species can be further subdivided into ________
A) mineral classes B) mineraloids C) evaporites D) varieties
What is NOT true about a stream’s base level?
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