Be aware that due to massive amount of problems with posters from GMAIL,
many readers of this newsgroup filter out all posts that come from @gmail
like your original post.
Your post needs as wide an audience as you can get. There is a remote
chance that the leach field for your septic tank system may be in some
way influencing the extra moisture in your sump pumps.
Also, with 3 acres of land I suspect your sump pumps would be directed to
a dry well (hole in ground filled with rocks and covered with dirt and
sod.) Rain fall in this wet summer may have soaked land around you and
dry well is saturated.
I am not an expert on this. Please post back about where you are
located, i.e.: dry southwest, Upper Midwest, Great lakes region, East
coast shore line. If you are in Iowa flood plain, or Mississippi valley,
go away until next year.