1. a Cypress Environmental Laboratory, City of Wichita Falls, 4801 BIG ED NEAL DR, Wichita Falls, TX 76310, United States
2. b Water Source/Purification, City of Wichita Falls, 4801 BIG ED NEAL DR, Wichita Falls, TX 76310, United States
3. c Public Utilities Administration, City of Wichita Falls, 4801 BIG ED NEAL DR, Wichita Falls, TX 76310, United States