1. Northern Natural Gas Company 1508 E Schrock Rd, Waterloo, IA 50701 Coordinate: 42.3994,-92.32754 Phone: (319) 296-2141
2. Sam Annis & Co 807 Rainbow Dr, Waterloo, IA 50701 Coordinate: 42.50969,-92.38044 Phone: (319) 486-1051