Water Quality

1. a figure expressing the acidity or alkalinity of a solution on a logarithmic scale on which 7 is neutral, lower values are more acid and higher values more alkaline
3. are found at underground mines and factories
5. change in water quality that can harm organisms or make water unfit for human use
8. The amount of oxygen gas that is found in water and is available to aquatic organisms. Cool water holds more and warm water holds less.
9. Rain Rain containing acids that form in the atmosphere

1. something that pollutes. any substance, as certain chemicals or waste products, that renders the air, soil, water, or other natural resources harmful or unsuitable for a specific purpose.
2. usually come from runoff from many different things such as parking lots, rivers, surface water, sediment
4. a substance used for destroying insects or other organisms harmful to cultivated plants or to animals.
6. Organisms that are used to monitor the health of an ecosystem. Some are tolerant of pollution and some are not. Finding few or only those that are tolerant indicates the water is polluted or something else has changed about the stream.
7. This describes the condition of the water, including chemical, physical, and biological characteristics, usually with respect to its suitability for a particular purpose such as drinking or swimming.