Members of "The Group"

AACRA Testing

ABC Water Specialty Inc.

Affordable Backflow Testing

Annapolis Water District

Aqua Containment Co

BAT Man Testing

Bowden's Services

Commercial Application Sales (CAS)

Cedar River W/S District

Certified Backflow Assembly Testing

Certified Backflow Testing

City of Algona

City of Arlington

City of Auburn

City of Bainbridge Island

City of Battle Ground

City of Bellevue

City of Bellingham

City of Blaine

City of Bothell

City of Bonney Lake

City of Bremerton

City of Colville

City of Dupont

City of Edmonds Public Works

City of Enumclaw

City of Everett Public Works

City of Ferndale

City of Hoquiam Water Department

City of Ilwaco

City of Issaquah

City of Lacey

City of Lynwood

City of Mercer Island

City of Oak Harbor

City of Puyallup

City of Redmond

City of Snohomish

City of Tumwater

Clearlake Water Dist.

Clearwater Backflow Testing

Coal Creek Utility Dist.

DCI Engineers

Department of Corrections

D.J.'s Plumbing

Ecology Assoc. Advocate

Firgrove Mutual Water Company

F.S. Landscape Maint.

Graham Hill Mutual Water

Gray & Osborne Inc.

King County Wastewater

King County Metro

McLaughlin's Backflow Service

Mt. View - Edgewood Water Co.

Nautilus Backflow Service

North Perry Avenue Water District

Northern Waters Inc.

Northern Waters Inc.

Northshore Water Utilities

Northwest Kidney Centers

Northwest Water Systems

Olympic Landscape

Olympic Water & Sewer Inc.

Olympic View Water & Sewer

On-Site Testing

Parkland Light & Water

Penn Cove Water & Sewer

Phoenix Landscape Maintenance

P.L.E. Backflow Testing

PUD #1 Clallam County

Qwest Communication

RA Brown Backflow Testing

Rainier View Water Company

Redwood Backflow

Robinson Plumbing Inc.

Rock of Ages Plumbing

Sammamish Plateau Water & Sewer District

Seattle Public Utilities

Silver lake Water & Sewer District

Silverdale Water Dist. #16

Skagit PUD

Snohomish County PUD #1

Spanaway Water Co.

Sunshine BA Testing

Spanaway Water Company

Superior Water Works

Tacoma Water

Three Lakes Water Assoc.

University of Washington

Valley Water Dist.

Water Dist. #19

Westgrow Corp.

WETRC/Green River CC

Watts (Hollabaugh Brothers)

Washington State Dept. of Health Office of Drinking Water

Woodinville Water District