Best Companies in Seattle, WA

Puget Sound Septic is a go-to company when you need dependable septic services in Seattle and King County WA.

The Plumbing Joint has been delivering expert septic services for more than 45 years, providing homeowners and businesses with reliable pumping, cleaning, repair, and installation solutions.

Cascade Drilling LP is a national field services contractor specializing in environmental, geotechnical, and construction projects. They are a leading provider of environmental and infrastructure drilling, in situ remediation application, direct push sampling, and well services. The company partners with clients to provide environmental and geotechnical solutions from concept to completion. Cascade Drilling has a wide array of technologies for various drilling applications and environments, meeting stringent state and local licensing requirements with crews qualified to work in all 50 states.

Offers free well water analysis in the greater Kent / Seattle areas.

Provides certified lab water testing for Seattle.

CLS Septics has been servicing King County's septic needs for both residential and commercial clients since 1999, offering drain field, septic tank, and pipe repairs.

Green Latrine offers professional septic tank pumping services in Seattle and pumping services for a variety of tanks, including holding tanks, sewage tanks, trailers, and toilets.

Affordable Water Treatment Systems Inc is a family-owned water treatment company founded in 1992 and headquartered in Gig Harbor, Washington, serving the greater Seattle-Tacoma metro area. Led by President Dale Spitler and Vice President Gloria Spitler, the business has spent over three decades helping residential and commercial customers solve water quality problems. The company specializes in the sales, installation, and service of water softening and conditioning equipment. Their core offerings include water softener installation and repair, whole-home filtration systems, reverse osmosis drinking water systems, and related water quality testing. They serve customers on both municipal water and private well systems throughout the Puget Sound region. Affordable Water Treatment Systems Inc holds an A+ rating with the Better Business Bureau, reflecting their consistent service quality and customer satisfaction over the years. The Gig Harbor location places them well to serve the Kitsap and Pierce County markets as well as the broader Seattle metropolitan corridor. With over 30 years of focused experience in water conditioning, they represent a dependable, locally rooted option for homeowners and small businesses seeking cleaner, safer water without the premium pricing of national franchises.

Alcorn Pump and Filtration LLC is a multi-generational water well and filtration company based in Enumclaw, Washington, serving the greater Seattle region and statewide. With pump and water filtration expertise passed down through four generations of the family, the company employs certified electricians and plumbers with deep knowledge of the Pacific Northwest water landscape. Services span the full spectrum of well and water system needs: well pump installation and repair, submersible pump services, full water filtration system installation, well inspections, water testing, agriculture water systems, and commercial and municipal water solutions. They are licensed to operate throughout Washington State for commercial, municipal, agricultural, and industrial clients. Alcorn Pump stands out for their 24/7 out-of-water emergency response line, dispatching technicians around the clock for urgent failures. Customer reviews reflect fast turnaround and technicians who work until the job is done — one review noted a tech working until midnight to restore a downed well system. Rated 4.5 stars on Yelp.

American Pump and Drilling is a full-service water systems company serving the Puget Sound Region of Washington State, headquartered at 9601 Old Hwy 99 SE in Olympia, WA. Originally founded as an owner-operated well pump company in 2003, the business expanded significantly in 2016 when it acquired Tims Well Drilling, a company with operational roots going back to 1977. This gives American Pump and Drilling a combined service history of nearly five decades in the region. The company provides an extensive range of water system services including residential and commercial well drilling, well pump installation and repair, water treatment and filtration (including reverse osmosis, UV purifiers, softeners, and conditioners), real estate water inspections, well decommissioning, backflow prevention, sump pumps, and water heaters. They serve homeowners, commercial clients, and municipalities throughout the Puget Sound area. American Pump and Drilling operates Monday through Friday, 8am to 4pm, and offers free estimates and financing options. They hold a 4.8-star rating across 275 customer reviews. Note: despite the Seattle classification in this database, their primary service area is centered on Olympia and the greater South Puget Sound region — not Seattle proper.

Alliance Pump LLC is a Washington state-licensed construction contractor specializing in water conditioning equipment, based in Wenatchee, WA (not Seattle). The business is owner-operated by Beau James Anderson and holds Washington State contractor license ALLIAPL815L6, originally active from June 2019. The company carries $1,000,000 in general liability insurance through Western National Mutual Insurance. While categorized under the well/septic contractor space in this database, Alliance Pump appears to focus on water conditioning and treatment equipment installation rather than septic pumping or well drilling as primary services. The Wenatchee location serves north-central Washington, not the Seattle metro area as the city tag suggests — this may indicate a data entry discrepancy in the source record. This entity warrants a data quality review: the assigned city (Seattle) does not match the company's registered address (Wenatchee, WA), and their primary service focus (water conditioning) may not align squarely with the well/septic contractor classification.

Since 1944, Nicholson Drilling Inc. has been serving residential and commercial customers in Pierce, Kitsap, and Mason County areas and are experts in locating, maximizing and utilizing the ground water resource in the Pacific Northwest.

Provides transparent quotes for new septic system installation in Seattle, Tacoma, Olympia, and surrounding areas.

Offers free, in-home testing for a variety of common water problems in Seattle, WA.

A family-owned operation providing fast, friendly sewer and outdoor plumbing services in Seattle and Everett, with over 20 years of experience.

Upfront Septic specializes in providing comprehensive septic pumping services in Seattle, ensuring your system runs smoothly, protecting your property and the environment.

JKA is a well water testing contractor in Washington that can schedule a water sample collection for certified testing.

Anderson Drilling LLC is a 4th-generation family-owned well drilling and pump service company based in Lake Stevens, WA, in the greater Seattle/Snohomish County area. The company traces its roots to 1889 and has been actively serving Snohomish County since the early 1960s, making them one of the longest-established drilling contractors in the Pacific Northwest. They specialize in water well drilling, well pump installation and repair, booster pump systems, and pump maintenance for residential and commercial clients. Their service territory covers all of Snohomish County, North King County, South Skagit County, and parts of Island County. Anderson Drilling is located at 6310 145th Drive NE, Lake Stevens, WA 98258, and can be reached at (425) 334-5400 or via email at andersondrilling@gmail.com. Their website is andersonpumpanddrilling.com. With over 130 years of family history in the drilling business and deep roots in the Snohomish County community, Anderson Drilling is one of the most trusted and established water well drilling contractors in the Seattle metro region.

Arcadia Drilling is a family-owned water well drilling and pump services company based in Shelton, Washington, serving the greater Puget Sound region. The company has operated since the early 1960s and has been owned by the Neal family since 1983, giving it over 60 years of continuous water well expertise in Washington State. Services include water well construction, well decommissioning, well pump installation and repair, pressure system installation, well maintenance, water filtration, and water system design and construction. The company serves Mason, Thurston, Grays Harbor, Kitsap, Lewis, Pacific, Jefferson, Pierce, and King Counties -- a broad footprint across western Washington. Arcadia Drilling has earned multiple 'Voted Best' awards in the Belfair and Shelton/Mason areas and maintains a strong community presence. Licensed in Washington State (WA Lic # ARCADDI098K1), the company is a member of the Shelton-Mason County Chamber of Commerce. Note: This entity is a name variant of 'Arcadia Drilling Inc' (also listed in Seattle). Both refer to the same company. This record (Arcadia Drilling) is the primary listing; the other should be reviewed for deduplication.

Provides professional lab testing to identify contaminants, minerals, and other impurities that may affect water quality.

JKA Well Drilling is a licensed Washington well repair contractor with the knowledge of electrical wiring and plumbing skills capable of replacing a well pump.

Price Busters Plumbing & Sewer provides exceptional septic repair and cleaning in Seattle, WA, and other areas.

A Wesco Septic, Inc. is a second-generation, family-owned septic service company based in Snohomish, Washington, with over 35 years of operation since its founding in 1989. The company serves Snohomish County, King County, and Camano Island — a broad swath of the greater Seattle metro and surrounding rural communities. Core services include septic tank pumping, system inspections for real estate transactions and routine maintenance, drain field repair, septic system repairs, and maintenance agreements. They offer line jetting and septic enzyme treatments as supplementary services. Emergency service is available around the clock at (360) 668-6561. A Wesco is fully licensed and insured and operates maintenance agreements for homeowners who want proactive scheduling rather than reactive service calls. Their deep regional experience with the soil conditions and regulatory requirements of the Pacific Northwest makes them a strong fit for rural residential and lakefront properties throughout the Snohomish and King County corridors. Typical pumping intervals run every 2-3 years depending on household size.

Arcadia Drilling Inc is a family-owned water well drilling and pump services company based in Shelton, Washington, serving the greater Puget Sound region. The company has operated since the early 1960s and has been owned by the Neal family since 1983, giving it over 60 years of continuous water well expertise in Washington State. Services include water well construction, well decommissioning, well pump installation and repair, pressure system installation, well maintenance, water filtration, and water system design and construction. The company serves Mason, Thurston, Grays Harbor, Kitsap, Lewis, Pacific, Jefferson, Pierce, and King Counties -- a broad footprint across western Washington. Arcadia Drilling has earned multiple 'Voted Best' awards in the Belfair and Shelton/Mason areas. Licensed in Washington State (WA Lic # ARCADDI098K1), the company is a well-regarded member of the local contractor community. Note: DUPLICATE RECORD. This entity ('Arcadia Drilling Inc') is a name variant of 'Arcadia Drilling' (ID: f8083baa-6c29-4747-82c8-c2370abed354), also listed in Seattle. Both records refer to the same company. This record should be flagged for deduplication and merged into the primary listing. The company is based in Shelton, WA -- not Seattle.

ACCESS WELL DRILLING is a family-owned water well drilling and pump service company based in Sedro-Woolley, Washington, serving Northwest Washington including Whatcom, Island, Skagit, and Snohomish Counties. The business was established in 2024 and is a member of the Washington State Ground Water Association (WSGWA). Services include water well drilling, well pump installation, well pump repair and replacement, well maintenance and servicing, well house plumbing, and water system troubleshooting. They offer 24/7 emergency service and free estimates for new projects, serving residential, agricultural, and commercial clients within approximately a 15-mile radius of Sedro-Woolley. The company is reachable at (360) 627-0782 and by email at braun@accesswelldrilling.com, with Braun Hopke as the primary contact. Their website at accesswelldrilling.com provides service information and contact forms. As a newly established business, Access Well Drilling has limited public review history but holds an A rating from the Better Business Bureau. Customers in the Seattle area should note the company is primarily based in Sedro-Woolley (~70 miles north of Seattle) and serves the greater Northwest Washington region rather than the Seattle metro specifically.

Offers professional, safe, and reliable septic services, including septic tank installation and repair, in Seattle.

Offers fast and reliable septic system repair services in the Greater Seattle Area, with emergency response, pipe camera diagnostics, and hydro jetting.

FloHawks Plumbing + Septic offers a wide range of services including septic pumping, inspections, repairs, and maintenance, serving Western Washington.

For over 45 years, Ralph's Pump & Well has cultivated a reputation in Seattle and throughout Snohomish and North King counties for dedication to quality customer service and expert care of well, water, and water pump systems.