1. Effects of Human Activity on Water

2. As our population increases so does our demand on Earth’s resources.

3. Water Human activities that affect water quality Mining Pulp mills
Dump sites
Industrial activities
Boating

5. pH
pH is a measure of the acidity or basicity of an aqueous solution.[1]
Pure water is said to be neutral, with a pH of 7.0
Below 7 is acidic
Above 7 is basic
Optimal range for most organisms is 6.5 to 8.2

6. Chlorine Added to city drinking water Kills bacteria
Can react with some natural compounds to create dangerous compounds.

7. Ammonia/Nitrite/Nitrate
Acts as a fertilizer for plants
When levels are high, excessive plant growth affects water quality
Enters water from human/animal waste, decomposing organic matter, and fertilizer runoff

8. Phosphate Acts as a fertilizer for plants
When levels are high, plants grow and die quickly creating water quality problems

9. Dissolved Oxygen Aquatic animals need dissolved oxygen to live
Below 2 or 1 ppm will not support fish
Below 3 ppm are stressful to most organisms
5 – 6 are required for growth