Top-rated water treatment pros.

Get matched with top water treatment pros in Seattle, WA

Enter your zip and get matched with up to 3 pros

Matching on HomeAdvisor

Share some details icon
Share some details about your home project.
Match with local pros icon
Within moments, match with highly-rated local pros.
Compare quotes icon
Compare quotes and choose the best pro for the job.

Top-Rated Water treatment pros in Seattle - Updated Nov 2026

Avatar for Northwest Water Systems, Inc.
Northwest Water Systems, Inc.
4.5(
12
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Seattle, WA and surrounding areas

Approved

In business since 1972

Free estimates

Emergency services offered

"Chris was awesome! Great price, great customer service, and did an excellent job with the installation. Chris was even kind enough to videotape a system walkthrough for future maintenance and explanation of the water system. Would recommend to anyone looking for a quality water filtration system with zero hassle!!"
Submersible pump repair
Submersible pump Repair
Subersible pump repair
Duckworth Pump & Well Truck
Duckworth Pump & Well Truck & Glenn

+5

Response time3 days
6 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Harts Plumbers, Electricians, & HVAC Technicians
Harts Plumbers, Electricians, & HVAC Technicians
4.6(
1,467
)
Water Treatment & Purification System - Install or Replace

Serving Seattle, WA and surrounding areas

Approved

Super Service Award Winner

In business since 2013

Emergency services offered

Warranties offered

"Had such a good experience ended up having them do alot more projects. Whole home redevice. Whole home generator. Updated breaker box with arc protection. Water softner/filtration system. Minisplit system. Better bathroom fans with odor/humidity sensors. Four ceiling fans. Exterior power outlets. And an electric car charger install as well."
Prep Area
Waterfall Finished!
Excavation jobs and more!
 install grease trap for commercial kitchen
Delivery of Shoring

+334

43 neighbors recently requested a quote
Recommended by86%of homeowners
Avatar for Robison Plumbing Service Inc
Robison Plumbing Service Inc
4.3(
112
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Seattle, WA and surrounding areas

Approved

In business since 1986

Emergency services offered

Warranties offered

We are committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty, and personal responsibility. Our distinction is the quality of service we bring to our customers. Accurate knowledge of our trade combined with ability is what makes us true professionals. Above all, we are watchful of our customers' interests, and make their concerns the basis of our business.

10 neighbors recently requested a quote
Recommended by80%of homeowners
Avatar for SIMBA SOLUTIONS CO LLC
SIMBA SOLUTIONS CO LLC
4.7(
18
)
Water Treatment & Purification System - Install or ReplaceWater Treatment & Purification System - Repair or Service

Serving Seattle, WA and surrounding areas

Approved

In business since 2025

Free estimates

Warranties offered

"Absolutely fantastic service!!! Jason did an amazing job installing our new tankless water heater, and the whole experience was smooth and stress-free. He took the time to answer all our questions, made sure everything was set up perfectly, and left the workspace spotless. You can tell he takes pride in his work. We?re beyond happy with the results and grateful for the excellent service"
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing
Simba plumbing

+29

1 neighbors recently requested a quote
Avatar for Dear Services
Dear Services
3.5(
285
)
Water Treatment & Purification System - Install or Replace

Serving Seattle, WA and surrounding areas

Approved

In business since 2014

Emergency services offered

Warranties offered

"When I asked for service because of a water leak, they gave me a next-day appointment, on Friday. Next day they called and said they couldn't come, but would come between 1 and 7 PM on Tuesday. Waited all afternoon on Tuesday and nothing, not even a call. Wednesday I called to report the failure and was told management would be notified. Thursday afternoon I called and was given an appointment between 1 and 7 PM the next day, Friday. On Friday an expert plumber showed up an hour early and did a marvelous job. Seemed to cost an arm and a leg, but complete and professional, along with good explanations of everything."
Kitchen rewire
lighting upgrade
Condo Rewire
Condo Rewire
Condo Rewire

+13

Response time12 hrs
16 neighbors recently requested a quote
Recommended by75%of homeowners
2 Sons Plumbing
5.0(
5
)
Water Treatment & Purification System - Repair or Service

Serving Seattle, WA and surrounding areas

Approved (Corporate)

In business since 2017

Credit card accepted

Offers commercial services

2 Sons Plumbing is a full-service plumbing and sewer company serving the greater Seattle area. Known for reliable service, honest recommendations, and quality workmanship, our team handles everything from everyday plumbing repairs to complex sewer solutions—helping homeowners keep their systems running smoothly year-round.

Showing 1-10 of 50

The Seattle, WA homeowners’ guide to water treatment services

From average costs to expert advice, get all the answers you need to get your job done.