| Business | Phone |
| Ecowater Systems 1819 E Sprague Ave, Spokane 99202 | (509) 535-2061 |
| Flint Services Inc 521 N Burns Rd, Spokane 99216 | (509) 921-9370 |
| Kinetico 10905 E Montgomery Dr, Spokane 99206 | (509) 327-1433 |
| Nalco Chemical Co 421 W Riverside Ave 770, Spokane 99201 | (509) 928-7713 |
| Scientific Water Treatment Co 125 S Stevens St, Spokane 99201 | (509) 747-7402 |
| Tri-Pure Water Resources 602 N Adams Rd, Spokane 99216 | (509) 327-9553 |
| Us Filter 1620 N Mamer Rd D200, Spokane 99216 | (509) 926-4335 |