Here are some graphs I found on air and stream pollution:

Air pollution in America over time:



http://english.people.com.cn/mediafile/200912/02/P200912021515392118984617.png

Ocean pollution:



http://waterstse.files.wordpress.com/2011/04/graph_ocean-pollutants1.jpg

Here is a chart that has all the tasks we use water for in our homes - many ways for pollutants to enter the water just from our usage:



http://academic.evergreen.edu/g/grossmaz/ABRASHNM/IMAGES/piegraphs_files/conservation_graphs_files/with.gif

It was hard to find a line graph for water pollution.  I found the following graph pertaining to London's water quality for 1990 through 2008.



http://www.environment-agency.gov.uk/static/images/Research/Figure-3-water-quality.jpg