Alabama
Alabama Onsite Wastewater Association
www.aowainfo.org; 334-396-3434
Arizona
Arizona Onsite Wastewater Recycling Association
www.azowra.org; 928-443-0333
Arkansas
Arkansas Onsite Wastewater Association
California
California Onsite Wastewater Association
www.cowa.org; 530-513-6658
Colorado
Colorado Professionals in Onsite Wastewater
www.cpow.net; 720-626-8989
Connecticut
Connecticut Onsite Wastewater Recycling Association
www.cowra-online.org; 860-267-1057
Delaware
Delaware On-Site Wastewater Recycling Association
Florida
Florida Onsite Wastewater Association
www.fowaonsite.com; 321-363-1590
Georgia
Georgia Onsite Wastewater Association
www.georgiaonsitewastewater.com; 678-646-0379
Georgia F.O.G. Alliance
Idaho
Onsite Wastewater Association of Idaho
www.owaidaho.org; 208-664-2133
Illinois
Onsite Wastewater Professionals of Illinois
Indiana
Indiana Onsite Waste Water Professionals Association
www.iowpa.org; 317-889-2382
Iowa
Iowa Onsite Waste Water Association
www.iowwa.com; 515-225-1051
Kansas
Kansas Small Flows Association
www.ksfa.org; 913-594-1472
Kentucky
Kentucky Onsite Wastewater Association
www.kyonsite.com; 855-818-5692
Maine
Maine Association Of Site Evaluators
Maine Association of Professional Soil Scientists
Maryland
Maryland Onsite Wastewater Professionals Association
www.mowpa.org; 443-570-2029
Massachusetts
Massachusetts Association of Onsite Wastewater Professionals
www.maowp.org; 781-393-5710
Michigan
Michigan Onsite Wastewater Recycling Association
Michigan Septic Tank Association
www.msta.biz; 989-808-8648
Minnesota
Minnesota Onsite Wastewater Association
www.mowa-mn.com; 888-810-4178
Missouri
Missouri Smallflows Organization
www.mosmallflows.org; 417-631-4027
Nebraska
Nebraska On-site Waste Water Association
www.nowwa.org; 402-476-0162
New England
Yankee Onsite Wastewater Assoc. (Massachusetts, Connecticut, Maine, New Hampshire, Rhode Island and Vermont)
www.yankeeonsite.org; 781-939-571
New Hampshire
New Hampshire Association of Septage Haulers
www.nhash.com; 603-831-8670
Granite State Designers and Installers Association
www.gsdia.org; 603-228-1231
New Mexico
Professional Onsite Wastewater Reuse Association of New Mexico
www.powranm.org; 505-989-7676
New York
Long Island Liquid Waste Association, Inc.
www.lilwa.org; 631-585-0448
North Carolina
North Carolina Septic Tank Association
www.ncsta.net; 336-416-3564
North Carolina Portable Toilet Group
www.ncportabletoiletgroup.org; 252-249-1097
North Carolina Pumper Group
www.ncpumpergroup.org; 252-249-1097
Ohio
Ohio Onsite Wastewater Association
www.ohioonsite.org; 866-843-4429
Oregon
Oregon Onsite Wastewater Association
www.o2wa.org; 541-389-6692
Pennsylvania
Pennsylvania Association of Sewage Enforcement Officers
www.pa-seo.org; 717-761-8648
Pennsylvania Onsite Wastewater Recycling Association
Pennsylvania Septage Management Association
www.psma.net; 717-763-7762
Tennessee
Tennessee Onsite Wastewater Association
Texas
Texas On-Site Wastewater Association
www.txowa.org; 888-398-7188
Utah
Utah Onsite Wastewater Association
www.utahonsite.org; 385-501-9580
Virginia
Virginia Onsite Wastewater Recycling Association
www.vowra.org; 540-377-9830
Washington
Washington On-Site Sewage Association
www.wossa.org; 253-770-6594
Wisconsin
Wisconsin Onsite Water Recycling Association
www.wowra.com; 608-441-1436
Wisconsin Liquid Waste Carriers Association
www.wlwca.com; 608-441-1436
NATIONAL
Water Environment Federation
www.wef.org; 800-666-0206
National Onsite Wastewater Recycling Association
www.nowra.org; 800-966-2942
National Association of Wastewater Technicians
www.nawt.org; 800-236-6298
CANADA
Alberta
Alberta Onsite Wastewater Management Association
www.aowma.com; 877-489-7471
British Columbia
WCOWMA Onsite Wastewater Management of B.C.
www.wcowma-bc.com; 877-489-7471
British Columbia Onsite Sewage Association
www.bcossa.org; 778-432-2120
Manitoba
Manitoba Onsite Wastewater Management Association
www.mowma.org; 877-489-7471
Onsite Wastewater Systems Installers of Manitoba, Inc.
www.owsim.com; 204-771-0455
New Brunswick
New Brunswick Association of Onsite Wastewater Professionals
www.nbaowp.ca; 506-455-5477
Nova Scotia
Waste Water Nova Scotia
www.wwns.ca; 902-246-2131
Ontario
Ontario Onsite Wastewater Association
www.oowa.org; 855-905-6692
Ontario Association of Sewage Industry Services
www.oasisontario.on.ca; 877-202-0082
Saskatchewan
Saskatchewan Onsite Wastewater Management Association
www.sowma.ca; 877-489-7471
Canadian Regional
Western Canada Onsite Wastewater Management Association
www.wcowma.com; 877-489-7471