| Business | Phone |
| Aqua Systems Of America Po Box 3664, Escondido 92033 | (760) 746-7222 |
| Clean World Waters 921 S Andreasen Dr, Escondido 92029 | (760) 735-9596 |
| Fraser & Assoc 3267 Bernardo Ln, Escondido 92029 | (760) 747-7811 |
| Separation Engineering Inc 931 S Andreasen Dr, Escondido 92029 | (760) 489-0101 |
| Aqua Solutions 970 W Valley Pkwy # 423, Escondido 92025 | (760) 432-9885 |