Annotated Sources On Water Pollution (For Irrigation)

http://www.geoflow.com/wastewater/sdi.htm

This study suggests that drip irrigation is effective for applying the water right where it is needed, and not creating runoff. This, in turn, reduces waste, and runoff. This article suggests that pesticides and any other chemical may be alright to use, when used alongside drip irrigation, because they stay right where they are needed, and don't become a part of our environment.

http://www.epa.gov/opp00001/health/human.htm

This government website discusses a few aspects of pesticides, the most interesting being the health effects. Depending on the type, they could affect the nervous system, skin, eyes, hormones, and heart.

http://www.globalhealingcenter.com/effects-of-pesticides.html

This website gives a lot of background information of what pesticides are, the different variations, what they do, how they are used, and all the different health and environmental effects. At the end, it suggests ways to reduce the number of pesticides that are used.