This list contains organizations that were members of WPCA at the time of dissolution, and was last updated in May 2018.

AMG Inc - Internal Medicine Physicians
ASI Technologies
Acme Galvanizing Inc
ADM Cocoa
Allen-Edmonds Shoe Corp.
Alto-Shamm Inc/Halo Heat Systems
American Family Insurance
American Lung Assoc. of WI
Anguil Environmental Systems, Inc.
Anthem Blue Cross Blue Shield
Aurora Healthcare
Aurora Psychiatric Hospital
Badger Meter, Inc.
Bicycle Federation of WI - SE
Bimbo Bakeries
BMO Harris Bank
Bradley Corporation
Brady Worldwide
Brenntag Great Lakes
Broan-Nutone LLC
Burlington Graphic Systems, Inc.
C&H Distributors, LLC
CNH Industrial
Carthage College
Castalloy, Inc
Catholic Financial Life
Cedar Community
Charter Manufacturing Co. Inc.
Children's Hospital of WI
City of Brookfield
City of Manitowoc
City of Milwaukee Health Dept.
City of New Berlin
City of Oak Creek
City of Oconomowoc
City of Racine
City of Racine Health Dept.
City of Wauwatosa
City of West Allis
Columbia-St. Mary's Hospital
Community Memorial Hospital
Concordia University
Cramer Coil & Transformer Co Inc.
Curative Care Network
Davis & Kuelthau, S C
Ductz Indoor Air Professionals
Duff & Phelps
Dynacare Laboratories
ER Wagner Mfg Co.
Eastcastle Place
Echo Lake Foods
Eco Hatchery LLC
Edstrom Industries, Inc.
EGS/Appleton Electric Foundry
Electrotek Corp.
Everbrite Inc.
Evergreen Credit Union
Evolution Marketing LLC
Fiberesin Industries, Inc.
Fight Asthma Milwaukee Allies
Fred Usinger Inc.
Fredman Bag Company
Froedtert Health
G&K Services
GE Healthcare
Gehl Company
General Mitchell International Airport
Germantown Chamber of Commerce
Glenroy, Inc.
Godfrey & Kahn, S C
Goodwill Industries of SE WI Inc.
Go Riteway Transportation Group
Grove Gear Division
H N T B Corporation
Harley-Davidson Motor Co.
Hartford Area Chamber of Commerce
Hartford Jt #1 School District
Hartford Memorial Hospital
Hartford Union High School
HB Performance Systems Inc
Helgesen Industries Inc.
Heraeus Electro-Nite
Hellermann Tyton Corp.
Howard Co Inc
Hyatt Regency Milwaukee
In-Sink-Erator Div.
ITU, Inc.
INOV8 International Inc.
Jewish Home & Care Center
Jockey International, Inc.
Johnson Controls, Inc.
Jorgensen Conveyors, Inc.
Journal Broadcast Group, Inc.
Journal Sentinel, Inc.
K S M Industries, Inc.
Keep Greater Milw. Beautiful
Kelch Corporation
Kenosha Area Family & Aging Services
Kickhaefer Mfg Co
Kohler Company
Kohl's Department Stores
Kwik Trip, Inc.
Ladish Co Inc
Lakeside Mfg Inc
Lake Terrace Health & Rehab Center
Lamplight Farms Inc.
Laureate Group
Lavelle Industries, Inc.
Leonardo Academy
LindenGrove Inc.
Liturgical Publications, Inc.
Lucas-Milhaupt, Inc.
MGIC Investment Corp.
Madison Gas & Electric
Madison Metropolitan School District
Mandel Co.
Marshall Auto Body
Master Lock Co.

Maynard Steel Casing
Menasha Packaging LCC
Menomonee Falls Chamber of Commerce
Metal Tek Centrifugal Div.
Metro Milw. Assn. of Commerce
Mid-America Steel Drum, Inc.
Miller Compressing Co.
Milsco Mfg./Jason Industries Inc.
Milwaukee Area Tech. College
Milwaukee Center for Independence
Milwaukee County
Milwaukee County Transit System
Milwaukee Environmental Consortium
MEC Midwest
Milwaukee Public Museum
Milwaukee Public Schools
Milwaukee Regional Medical Center
Milwaukee VA Medical Center
Modine Manufacturing Co.
Molded Dimensions
Mount Mary University
Natural Resource Technology, Inc.
N E L Frequency Controls, Inc.
New Berlin Chamber of Commerce
Norstar Aluminum Molds
Northwestern Mutual
Ocean Spray Cranberry Inc.
Orion Energy Systems, Inc.
Oshkosh Corporation
Ozaukee County
PPG Industries, Inc.
Packaging Corp of America
Pentair Residential Filtration
Phillip Lithographing Co.
Phoenix Products Co.
Potawatomi Bingo Casino
Public Service Commission of WI
Quad/Graphics, Inc.
Racine Area Manufacturers & Commerce
Racine Correctinal Institute
Racine County
Racine County Public Works
Racine County Ridgewood Care Center
Racine County Service Center
Racine Dominicans
RDA Enthusiast Brands LLC
Regalware Inc
Renaissance Manufacturing Group
Rexnord Industries
Rite-Hite Corp
River Hills West Health Care Centrr
Rockwell Automation
Roger's Memorial Hospital
Roundy's, Inc.
S C Johnson & Son, Inc.
SCS Engineers
Seek, Inc.
Senior Flexonics-GA Precision
Sensient Technologies Corp.
Serigraph, Inc.
Share Corp
Sheridan Medical Complex
Short Elliott Hendrickson, Inc
Signicast Corporation
Sixteenth Street Community Health Ctr.
Snap-On Inc.
Southern WI Ctr for the Dev. Disabled
Stericycle, Inc.
Strattec Security Corp.
Tekra Corporation
Telsmith Inc.
Times Printing Co.
Town of Brookfield
Town of Vernon
Town of Waukesha
Twin Disk Inc
U.S. Bank
U.S. Naval & Marine Corps Reserve Ctr.
U.S. Postal Service
UW Health
Union Cab
University of Wisconsin-Milwaukee
University of Wisconsin-Waukesha
Urban Ecology Center
Vesta, Inc.
Village of Menomonee Falls
Village of Richfield
Visual Impressions Inc
Wacker Neuson
Warren Industries, Inc.
Washington County
Washington Manor
Waste Management of Wisconsin Inc.
Waukesha County
Waukesha County Tech College
Waukesha Engine Division
Waukesha Foundry, Inc.
Waukesha Metro Transit
We Energies
Weasler Engineering Inc.
Weather Shield Mfg, Inc.
West Bend Clinic, Inc
West Bend Mutual Insurance, Co.
Western Products
Western States Envelope & Label
WEYCO Group Inc
Wheaton Franciscan Healthcare │Ascension
Whyte Hirschboeck Dubek SC
Wisconsin Green Muslims
WI Center for Environmental Education
WI Clean Cities-SE Area, Inc.
WI Dept of Natural Resources
WI Dept of Transportation
WI Interfaith Power & Light
WI Manufacturers & Commerce
WI Ready Mixed Concrete Assoc.
WI State Energy Office