Northwest Water Treatment LLC
Water treatment service contractor · Seattle, WA
Contact and location
| Address | 8600 Bender Rd |
|---|---|
| Phone | (360) 469-5658 |
What to confirm before booking
- Ask for the state or local licence or registration, and whether the firm is certified for the treatment type you need.
- Ask what the water test covers and who pays for it, and get the result in writing before equipment is chosen.
- Ask what the warranty covers - equipment, labour and media replacement are often separate - and what maintenance voids it.
Local cost context
Water treatment service in Seattle sits inside the national bands published on this site: whole-house softener, installed at $2,500–$6,000, checked 8 November 2026. That is a planning band, not a quote from this firm. See the cost guides →