Alabama
Alabama Onsite Wastewater Association
www.aowainfo.org; 334-396-3434
Arizona
Arizona Onsite Wastewater Recycling Association
www.azowra.org; 928-443-0333
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
myfowa.com; 863-845-5262
Georgia
Georgia Onsite Wastewater Association
gowa.wildapricot.org; 706-407-2552
Southeastern FOG Alliance
www.southeasternfogalliance.org
Illinois
Onsite Wastewater Professionals of Illinois
www.owpi.org
Indiana
Indiana Onsite Wastewater Professionals Association
www.iowpa.org; 317-965-1859
Iowa
Iowa Onsite Waste Water Association
www.iowwa.com; 515-225-1051
Kansas
Kansas Small Flows Association
www.ksfa.org; 785-823-5295
Kentucky
Kentucky Onsite Wastewater Association
www.kyonsite.com; 502-352-2575
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
mowra.net
Michigan Septic Tank Association
www.msta.biz; 989-808-8648
Minnesota
Minnesota Onsite Wastewater Association
www.mowa-mn.com; 612-361-9629
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; 781-939-5710
New Hampshire
New Hampshire Association of Septage Haulers
www.nhash.com; 603-619-8868
Granite State Designers and Installers Association
gsowa.org; 603-228-1231
New Mexico
Professional Onsite Wastewater Reuse Association of New Mexico
powranm.com; 505-379-2293
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 Dakota
North Dakota Onsite Wastewater Recycling Association
ndowra.org; 701-331-2400
Ohio
Ohio Onsite Wastewater Association
www.ohioonsite.org; 740-828-3000
Oklahoma
Oklahoma Onsite Wastewater Association
ooaok.org; 918-727-7113
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
South Carolina
South Carolina Onsite Wastewater Association
www.scowa.org; 803-877-7388
Tennessee
Tennessee Onsite Wastewater Association
www.tnonsite.org
Texas
Texas On-Site Wastewater Association
www.txowa.org
Utah
Utah Onsite Wastewater Association
www.uthonsite.org
Virginia
Virginia Onsite Wastewater Recycling Association
www.vowra.org; 540-885-8500
Washington
Washington On-Site Sewage Association
www.wossa.org; 253-770-6594
Wisconsin
Wisconsin Onsite Water Recycling Association
www.wowra.com; 888-782-6815
Wisconsin Liquid Waste Carriers Association
wlwca.wildapricot.org
NATIONAL
Water Environment Federation
www.wef.org; 800-666-0206
National Onsite Wastewater Recycling Association
www.nowra.org; 978-496-1800
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; 855-872-2645
British Columbia Onsite Sewage Association
www.bcossa.org; 778-432-2120
Manitoba
Manitoba Onsite Wastewater Management Association
www.mowma.org; 855-872-2659
Nova Scotia
Waste Water Nova Scotia Society
www.wwns.ca; 902-578-3268
Ontario
Ontario Onsite Wastewater Association
www.oowa.org; 855-905-6692
Ontario Association of Sewage Industry Services
www.oasisontario.on.ca
Saskatchewan
Saskatchewan Onsite Wastewater Management Association
www.sowma.ca; 855-872-2650
Canadian Regional
Western Canada Onsite Wastewater Management Association
www.wcowma.com
