| Business | Phone |
| Hankin Ozone Systems Inc 45300 Industrial Pl, Fremont 94538 | (650) 964-8751 |
| Pure Diamond Water 41200 Blacow Rd # H, Fremont 94538 | (510) 979-9100 |
| Us Filter 41650 Christy St, Fremont 94538 | (510) 623-9850 |
| Water Emporium 3918 Washington Blvd, Fremont 94538 | (510) 438-9739 |
| Water Solutions 350 Mayhews Rd, Fremont 94536 | (510) 790-1602 |