Download the list of Water treatment plants in Phoenix. Smartscrapers provides an accurate directory and the latest data on the number of Water treatment plants in Phoenix There are 47 Water treatment plants in Phoenix as of October 15, 2025; which is an 0.00% increase from 2023. Of these locations, 43 Water treatment plants which is 91.49% of all Water treatment plants in Phoenix are single-owner operations, while the remaining 4 which is 8.51% are part of larger brands. Average age of Water treatment plants in Phoenix is 5 years and 7 months.