"Underground source of drinking water" means an aquifer or its portion which:

1. (1) supplies any public water system; or

2. (2) contains a sufficient quantity of ground water to supply a public water system and:

   1. (A) currently supplies drinking water for human consumption; or

   2. (B) contains fewer than ten thousand (10,000) milligrams per liter of total dissolved solids;

      and which is not an exempted aquifer.

As added by P.L.161-2026, SEC.39.