Jul 22, 2013 - 07:59 PM
It would be hard to contaminate well water with any pesticide, unless you physically poured the pesticide into the well, or water or rain washed it into the well.
In most cases, 99.99% of the time, as long as you use them as directed, and especially Premise, there is a very small chance of contamination. The label on Premise 2 and Premise 75 calls for a 5 foot distance from the point of treatment.
These products will not leach through the soil if that is what you are thinking.