Can you read?

Not trying to insult anyone but this might help you if you have trouble with fertilizers...

http://www.ncagr.gov/cyber/kidswrld/plant/nutrient.htm

You can also get reports from the water quality or water authority dept.

http://crwater.com/images/stories/clackamas2009wqrweb.pdf

They moniter every week or more, so you might have to request an updated result, but ye...