• Determine the quality of fresh water using chemical testing and bioassessment
• Describe the use of chemicals and microorganisms in water treatment

Water Quality For Freshwater Organisms
The purpose of this activity is to demonstrate to
students the effect increased water temperature has on the amount
of dissolved oxygen found in water and in turn upon the gill beat
rate of fish.

What's the red in the water?
Tutorial with Text & Images. "Collecting the bacteria and viewing them through a microscope is one way to tell important differences in the water chemistry from one site to the next."

Water, Water Everywhere
Most Americans take an endless supply of drinkable water for granted. This is not so in all parts of the world. The goal of this lesson is to familiarize students with the realities about water supply in other nations, as well as in the United States, and what the future holds.

Contaminants in the Water Cycle
Students will review the water cycle and investigate how a region's water supply can become contaminated. They will look at a list of the Environmental Protection Agency's maximum contaminant levels for drinking water, and sketch the water cycle of a fictitious town that is affected by several pollutants. Students will conclude by writing paragraphs explaining what a group of concerned citizens in this hypothetical town might do to improve the quality of its water supply.

Welcome to the NRCS Soils Website

AirData : Access to Air Pollution Data

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