[1] City of Wichita Falls, TX, United States
[2] Pinellas County (Fla.) Utilities, United States
[3] Trent University, Canada
[4] Zaitlin Geoconsulting, Canada
[5] Smith-Comeskey Ground Water Science, United States
[6] Droycon Bioconcepts, Canada
[7] Portland (Ore.) Water Bureau, United States
[8] Coachella Valley Water District (Calif.), United States
[9] Texas AM Engineering Extension Service, United States