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; www.arkowa.com
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; www.dowra.org
Florida
Florida Onsite Wastewater Association; www.fowaonsite.com; 321/363-1590
Georgia
Georgia Onsite Wastewater Association; www.onsitewastewater.org; 678/646-0379
Georgia F.O.G. Alliance; www.georgiafog.com
Idaho
Onsite Wastewater Association of Idaho; www.owaidaho.org; 208/664-2133
Illinois
Onsite Wastewater Professionals of Illinois; www.owpi.net
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.kentuckyonsite.org; 855/818-5692
Maine
Maine Association Of Site Evaluators; www.mainese.com
Maine Association of Professional Soil Scientists; www.mapss.org
Maryland
Maryland Onsite Wastewater Professionals Association; www.mowpa.org; 443/570-2029
Michigan
Michigan Onsite Wastewater Recycling Association; www.mowra.org
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; 417/739-4100
Nebraska
Nebraska On-site Waste Water Association; www.nowwa.org; 402/476-0162
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
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; www.powra.org
Pennsylvania Septage Management Association; www.psma.net; 717/763-7762
Tennessee
Tennessee Onsite Wastewater Association; www.tnonsite.org
Texas
Texas On-Site Wastewater Association; www.txowa.org; 888/398-7188
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
Manitoba
Manitoba Onsite Wastewater Management Association; www.mowma.org; 877/489-7471
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; 877/489-7471O
