Indiana Code Title 13. Environment § 13-18-16-13.5

(1) a public utility (as defined in IC 8-1-2-1(a));

(2) a municipally owned utility (as defined in IC 8-1-2-1(h));

(3) a not-for-profit utility (as defined in IC 8-1-2-125(a));

(4) a cooperatively owned corporation;

(5) a conservancy district established under IC 14-33;  or

(6) a regional water district established under IC 13-26;

(1) seeking damages from a water utility;  and

(2) arising out of an alleged exposure to drinking water supplied by the water utility;