please help me?
the_man asked:
http://www.epa.gov/owow/monitoring/nationswaters/whatdo.pdf
http://www.epa.gov/owow/monitoring/nationswaters/whatdo.pdf
Why do scientists test water’s turbidity?
Why are scientists concerned about the presence of fecal coliforms in a stream or lake?
How does a visual survey help a scientist determine water quality?
What is biological sampling?
How does biological sampling help a scientist to determine water quality?
Tags: water quality management, water quality, water quality testing, water quality test, water quality assessment
Turbidity is the presence of suspended materials in water. Items such as clay, silt, organic material or other inorganic materials comprise turbidity.
Turbidity may not affect health, but it is a function of water quality. Solids settle and can harm water streams.
Fecal Coliforms are poop in water. Too much can make you sick.
Visual surveys of water include turbidity, color, odor, foamability. Each of these can decrease water quality.
Biological testing is very important because biological agents may modify the phyical or chemical characteristics of water. Biological sampling includes biological oxygen demand (BOD) and other tests.
Water for drinking and cooking purposes must be made free from disease producing organisms (such as bacteria, protozoa, viruses and helminths [worms]).