[By your reasoning, since you chose to live in an area with military aircraft, it would be fine for the Navy to parade EA-18s, in full afterburner, six inches over your rooftop, 24 hours a day]

As part of the Island County disclosure requirement (started after WISE helped get NASWI on the BRAC list), the noise contour map are provided online or at the County Office.  This map is typically included in the required disclosure form prior to buying a property.  Pretty straightforward.