Northwest (Puget Sound & islands)
A & A Well Drilling
Lopez Island company in San Juan County with an Ecology-licensed water well operator and L&I pump registrations, listed from state license records.
A-Plus Water Services
Arlington well pump company serving Snohomish, Skagit, Island and north King counties with pump replacement and repair, pressure tanks, real-estate well inspections and well water treatment.
A1 Drilling and Digging
Stanwood well contractor building 36-inch dug wells and 6- to 12-inch cable tool drilled wells for domestic, irrigation and community water systems, with well decommissioning and pump sales and service.
AAA Pump & Well Drilling
Family-owned Monroe well driller and pump company, serving Snohomish and King counties since 1960, with drilling, decommissioning, well rehab, pump and storage systems, water treatment and inspections.
Access Well Drilling
Sedro-Woolley well driller, started in 2024, drilling residential, irrigation and municipal wells, installing pumps and treatment, inspecting and decommissioning wells in Skagit, Whatcom, Island and Snohomish counties.
Alcorn Pump & Water Filtration
Family-owned Enumclaw well pump and filtration company doing pump installation and repair, pressure and storage systems, well rehabilitation by brushing and bailing, well shock, inspections, flow tests and well water filtration, with 24-hour out-of-water service.
Anderson Drilling
Lake Stevens company in Snohomish County with an Ecology-licensed water well operator and L&I pump registrations, listed from state license records.
Aquatech Well Drilling & Pumps
Sedro-Woolley well driller and pump company drilling domestic and irrigation wells and installing pumps, storage and water treatment across Skagit, Island, Snohomish, San Juan, Whatcom and north King counties.
B & C Well Drilling
Bellingham company in Whatcom County with an Ecology-licensed water well operator and L&I pump registrations, listed from state license records.
Barker Drilling
Mount Vernon driller building domestic, irrigation and commercial water wells and geothermal heat pump boreholes, installing and repairing submersible and line shaft turbine pumps, with 24-hour emergency pump repair.
Brown's Plumbing & Pumps
Marysville plumbing, pump and spa company with a retail store, providing well pump replacement, pressure and storage tanks, booster pumps, real-estate inspections and well water treatment around Marysville, Arlington and Everett since 1945.
Coldspring Pumps
Eastsound water system company serving San Juan County since 1980, with well testing, system design, pump and pressure tank installation and repair, filtration, and rain catchment and other alternative water supplies.
Coolwater Drilling
Bremerton company in Kitsap County with an Ecology-licensed water well operator and L&I pump registrations, listed from state license records.
Crabtree Well Drilling
Family-owned Kingston well driller, in business since 1962, drilling residential and commercial wells, selling and repairing pumps, inspecting and decommissioning wells across Kitsap County and parts of Jefferson and Clallam counties.
Dahlman Pump & Well Drilling
Family-owned Skagit County well driller and pump installer, in business since 1950, drilling 6- to 14-inch wells and installing pumps, tanks and water filtration across northwest Washington.
Duckworth Pump & Well Services
Port Orchard pump and well service company, founded in 1972, doing pump and pressure tank work, well inspections, water testing and treatment around Kitsap County, Gig Harbor and Port Ludlow.
Gresham Pump & Drilling
Family-owned Poulsbo well driller and pump company, established in 1977, drilling, cleaning and decommissioning wells and installing pumps, storage and treatment in Kitsap, Jefferson, Pierce and Mason counties.
JKA Well Drilling & Pumps
Family-run Monroe well driller and pump company, founded in 1989, drilling, rehabilitating, inspecting and decommissioning wells and installing pumps, tanks and water treatment for homes in King and Snohomish counties.
Livermore & Son
Family-owned Deming well driller and pump service company drilling steel-cased wells, repairing and replacing pumps, remediating sandy or declining wells, and testing and inspecting wells in Whatcom and Skagit counties.
Lofall Well Drilling
Poulsbo water well driller founded in 1988, drilling residential, Group B community and replacement wells, deepening and rejuvenating wells, decommissioning and replacing pumps in Kitsap, Jefferson, Clallam and Mason counties.
Mauldin's Well Service
Friday Harbor company in San Juan County with an Ecology-licensed water well operator and L&I pump registrations, listed from state license records.
Mr. Bill's Pump & Well
Arlington pump and well service company, established in 1978, serving Snohomish, King, Island and Skagit counties with pump and pressure tank work, holding tanks, well jetting, inspections and water treatment.
Nicholson Drilling
Port Orchard well and pump company serving Kitsap, Pierce and Mason counties since 1944, installing, maintaining and repairing well pumps, pressure tanks and whole-house filtration, with 24/7 emergency response.
Ralph's Pump & Well Service
Monroe well pump company serving Snohomish and north King counties with same-day pump repair, pump and booster installation, real-estate well inspections and well water treatment.
RH Drilling & Services
Water well driller formed in 2010, drilling 5- to 25-inch cable tool and air-rotary wells, deepening and cleaning out wells, and installing pumps and filtration, mainly in Island, Clallam, Pierce and King counties.
Specialty Pump & Well
Snohomish well pump company serving Snohomish County, east King County, Camano and Whidbey islands since 1979, with same-day pump repair, pump installation, pressure and storage tanks, well inspections and water treatment.
Steve's Pump & Well Service
Port Orchard pump and well service company designing, installing and repairing well pump and pressure systems, testing pumps and water, and installing water treatment in Kitsap, Pierce, Thurston, Mason and nearby counties.
Total Wells Pumps and Filtration
Monroe-area well company on the Snohomish–King county line, doing pump repair and replacement, booster and storage systems, well rehabilitation and bailing, camera inspections, real-estate well inspections and filtration.
Valley Pump Inc.
Family-owned Auburn pump and well drilling company, in business since 1938, drilling wells in King and Pierce counties and installing pumps, tanks and filtration, with well inspections for real estate sales.
Southwest & Olympic Peninsula
American Pump and Drilling
Olympia water system company, registered as Tacoma Pump & Drilling, offering residential and commercial well drilling, pump installation and repair, water treatment, real estate water inspections and well decommissioning.
Aqua Pumps and Drilling
Port Angeles, Clallam County, water well driller listed from state license records, with two Ecology-licensed water well operators and an L&I pump contractor registration.
Arcadia Drilling
Shelton water well driller and pump contractor, family-owned since 1962, drilling wells and installing and servicing pumps, pressure systems and well disinfection across nine western Washington counties.
Blue Line Water
Puyallup water treatment and well pump company, established in 2001, serving Pierce, King, Kitsap and Thurston counties with pump systems, well water treatment, inspections and flow tests.
Clarkes Pump Service
Family-run Lacey well pump company installing and repairing well pumps, pressure tanks, booster pumps and storage tanks, doing well inspections and flow tests, and installing iron filters, softeners and UV systems across the South Sound.
Dale McGhee & Sons
Kelso well driller serving Cowlitz County and surrounding areas since 1946, offering rotary well drilling, deepening and decommissioning, pump and tank installation, and water filtration and conditioning.
Davis Drilling
Belfair, Mason County, water well driller listed from state license records, with two Ecology-licensed water well operators and an L&I pump contractor registration.
Davis Pumps
Family-owned Belfair pump company serving Mason and Kitsap counties and parts of Pierce and Thurston with well water systems, pump and tank repair, well inspections, water testing and filtration.
Grays Harbor Equipment
Aberdeen pump, pool and plumbing supply store that installs and services residential and commercial submersible and jet pumps, installs water treatment and conditioning, and sells pressure tanks, well supplies and storage tanks.
Integrity Pumps & Filtration
Family-owned Sequim pump and filtration company with a store on Business Park Loop, installing and servicing well pumps, pressure tanks, holding tanks and water treatment, with 24-hour emergency pump service.
Mather & Sons Pump Service
Vancouver pump sales and service company, family-owned since 1955, installing and repairing well pumps, pressure tanks and water treatment for homes in southern Washington and the Portland area, plus well testing and sand bailing.
Moerke & Sons Pump & Drilling
Chehalis well driller and pump contractor, family-owned since 1980, offering well drilling and decommissioning, 24/7 pump repair, water filtration and bulk water delivery in southwest Washington.
- BBB reviews
Mountain View Pumps & Filtration
Eatonville pump and filtration company, established in 1994, installing and repairing well pumps, pressure tanks and holding tanks, cleaning wells by brush and bail, and selling water treatment across Pierce, south King, Thurston and Lewis counties.
Oasis Well Drilling
Port Angeles, Clallam County, water well driller listed from state license records, with one Ecology-licensed water well operator and an L&I pump contractor registration.
Peterson Pump Service
Family-owned well pump installation and repair business near Woodland in north Clark County, answering calls six days a week from early morning to late evening.
Pitner Drilling & Pump
Family-owned well driller and pump contractor in Ariel, near Woodland, serving Cowlitz, Clark, Skamania and Wahkiakum counties since 1961 with well drilling, pump service, flow tests, inspections and water treatment.
Richardson Well Drilling
Puyallup well driller in business since 1939, drilling domestic, irrigation and municipal wells with dual rotary rigs and offering pump service, water conditioning and iron removal in seven western Washington counties.
Ron Edgell Well Drilling
Castle Rock, Cowlitz County, water well driller listed from state license records, with two Ecology-licensed water well operators and an L&I pump contractor registration.
Sanders Pump and Filtration
Family-owned pump and filtration business based in Amboy, serving southwest Washington with well pump installation and repair, VFD systems, cisterns, flow tests, water testing and well water filtration.
Skyline Pump & Machine
Family-owned Chehalis water system company, in business since 1984, offering well drilling, pump installation and repair, VFD controls, well maintenance, decommissioning and water filtration, with 24/7 emergency service.
Wells and More
Castle Rock, Cowlitz County, water well driller listed from state license records, with one Ecology-licensed water well operator and an L&I pump contractor registration.
West Coast Plumbing Pumps & Filtration
Family-owned Lacey plumbing, pump and filtration company doing well pump repair, replacement and installation around Olympia since 2012, plus water softeners and filtration, serving Thurston, Pierce, Mason, Grays Harbor and King counties.
Central Washington
Empire EWP
Wenatchee well driller drilling domestic, irrigation and municipal wells, with pump service, flow testing, water sampling and well decommissioning across central and eastern Washington.
M & M Pumping
Richland water well and pump company serving residential, agricultural and commercial customers with pump installation and repair, pressure tanks, reservoir systems, well flow tests including VA/FHA tests, and water treatment.
MVM Quality Drilling
Family-owned Pateros well driller and pump installer serving North Central Washington, drilling water wells with air rotary rigs and designing pump systems.
O'Connell Drilling & Supply
Brewster well driller and pump supplier drilling domestic and agricultural wells and installing turbine, submersible and centrifugal pumps in Okanogan, Douglas and Chelan counties.
Oasis Drilling
Union Gap well driller serving the Yakima Valley since 1985, drilling domestic, irrigation, livestock, community and geothermal wells, installing pumps and decommissioning wells.
Okanogan Drilling & Pump Services
Omak-area well driller and pump installer since 1981, drilling residential wells and selling, installing and repairing pumps in Okanogan and Ferry counties, with 24/7 pump service.
Picatti Brothers
Yakima well and pump service company, in business since 1928, repairing and replacing residential, farm and municipal well pumps, with constant-pressure systems, well videoing and rehabilitation and 24/7 emergency service.
Precision Pump and Well Services
Benton City well pump company installing, repairing and replacing well pumps and pressure tanks and inspecting well systems across the Tri-Cities and lower Yakima Valley, with 24/7 emergency service.
Robinson Drilling & Development
Yakima well driller and pump installer, listed from Washington Ecology water well operator licenses and L&I pump contractor registrations.
Schroder's Well Drilling
Goldendale well driller and pump installer in Klickitat County, listed from Washington Ecology water well operator licenses and L&I pump contractor registrations.
Tumwater Drilling & Pump
Dryden well driller and pump company, in business since 1974, drilling 6- to 10-inch domestic and irrigation wells and offering pump service, flow tests and water treatment in Chelan, Douglas, Kittitas and Grant counties.
Twisp Well Pump
Twisp domestic well pump contractor installing and servicing standard and variable speed pump systems, inspecting well equipment for home sales, collecting water samples and running drawdown tests.
Eastern Washington
A & H Well Services
Family-owned well company based in Chewelah that drills wells, installs and repairs pumps, and offers well rehabilitation, video logging, flow and water testing and cisterns, with 24/7 service.
Basin Pump Service
Family-owned Moses Lake pump company working on domestic and small irrigation well systems in the Columbia Basin since 1993, with 24/7 pump service.
DC Drilling
Moses Lake well drilling contractor drilling domestic, irrigation and municipal wells across the Columbia Basin, with well cleaning, repair, deepening, flow tests and decommissioning.
Fogle Pump & Supply
Colville-based well driller, pump installer and water treatment company in business since 1981, with offices in Colville, Republic, Airway Heights and Deer Park serving eastern Washington.
Gady Pump & Electric
Colbert pump and electrical contractor serving Spokane since 1971, installing and servicing well pumps, pump controls, pressure tanks and reservoir systems for homes, water districts and golf courses.
H2O Well Service
Well drilling, pump installation and repair, and water treatment company founded in 1976, with offices in Hayden and Sagle, Idaho and Deer Park, Washington, serving North Idaho and Eastern Washington.
Joyco Drilling
Family-owned well driller and pump installer based near Elk, serving northeast Washington and northwest Idaho with drilling, deepening, cleanout, decommissioning, camera inspection, pumps and cisterns.
Ken Thompson Drilling
Ecology-licensed water well driller in Moses Lake, Grant County, with L&I pump and irrigation licenses, listed here from Washington state license records.
Lemco Drilling
Family-owned well driller and pump company in Lind, drilling domestic, commercial and small irrigation wells and installing and servicing pumps in Adams, Grant, Franklin, Whitman and Lincoln counties.
Nielsen Pump Service
Family-owned water well pump service for the Tri-Cities and surrounding area, installing and repairing well pumps and doing drawdown testing, water sampling and temporary water setups.
Northern Water & Power
Post Falls, Idaho well pump, water treatment and home services company with a Cheney location, serving eastern Washington and north Idaho with well pump repair and installation, reservoirs and well water treatment.
Pat's Pumps
Family-owned well pump company in Elk serving rural Spokane County, northeastern Washington and north Idaho, installing and repairing submersible and jet well pumps for homes, farms and businesses.
Pride Pump
Chattaroy well and pump service company working around Spokane and the Inland Northwest on well pumps, constant-pressure systems, reservoirs, well inspections, rehabilitation, water testing and treatment.
The Drillerman
Newport water well driller in Pend Oreille County, with an Ecology water well operator license and L&I domestic pump licenses. Listed from state license records; no working company website was found.
TPM Water Systems
Family-owned Lewiston-Clarkston area well pump contractor, working in the region for more than 40 years, that installs, repairs and replaces well pumps and installs home water reservoir systems.
Vermillion Pump & Drilling
Family-owned Chattaroy well driller and pump company serving Spokane and surrounding areas, offering well drilling, deepening, clean-out and repair, pump systems, reservoirs, well video and certified pump tests.
Westland Drilling & Pump
Moses Lake well pump contractor installing, repairing and replacing well pump systems and testing wells across central and eastern Washington.
Wilson Water Co.
Odessa-area pump contractor providing agricultural and domestic pump service across the Columbia Basin, working on turbine, centrifugal and submersible pumps and VFD systems.