EXHIBIT 23 CONSENT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our reports included in this Form 10-K, into NIPSCO Industries, Inc.'s previously filed Form S-8 Registration Statement No. 33-30619; Form S-8 Registration Statement No. 33-30621; Form S-8 Registration Statement No. 333- 08263; Form S-8 Registration Statement No. 333-19981; Form S-8 Registration Statement No. 333-19983; Form S-8 Registration Statement No. 333-19985; Form S-8 Registration Statement No. 333-59151; Form S-8 Registration Statement No. 333-59153; Form S-3 Registration Statement No. 333-69279; Form S-3 Registration Statement No. 333-22347; Form S-3 Registration Statement No. 333- 26847 and Form S-3 Registration Statement No. 333-39911. Chicago, Illinois March 25, 1999 39