pesticide variance again

Again i reviewed data from the state and my weather data and relized that i have answered my question from the last post on this subject many times...
there are 2 sources for every well with a septic system!
Once a well has pesticides in it, the septic system does also and since around here the septic is a major source of recharge for the well, you have very rapidly another source...not fun.
Now what does this mean?  When the weather is very dry - you will not get recharge from the septic.
From the data, i found a particularly bad time August 2010...