Association finder
Find your septic association
69 state, provincial and regional associations across 47 states and 5 provinces, plus 4 national groups. Pick your state or search by name.
📅 See every association’s 2027 conference on our events calendarNational & international
National Association of Wastewater Technicians (NAWT)
NationalPumper, hauler and inspector certification; serves every state.
National Onsite Wastewater Recycling Association (NOWRA)
NationalNational umbrella for 25 state affiliates; hosts the Onsite Wastewater Mega-Conference.
Portable Sanitation Association International (PSAI)
NationalFor operators who also run portable restrooms.
National Environmental Health Association (NEHA)
NationalEnvironmental health professionals, including onsite regulators.
Alabama
Alabama Onsite Wastewater Association (AOWA)
Onsite & septicArizona
Arizona Onsite Water Reclamation Association (AzOWRA)
Onsite & septicArkansas
Arkansas Water & Wastewater Managers Association (AWWMA)
Water & wastewaterCalifornia
California Onsite Water Association (COWA)
Onsite & septicColorado
Colorado Professionals in Onsite Wastewater (CPOW)
Onsite & septicConnecticut
Connecticut Onsite Wastewater Recycling Association (COWRA)
Onsite & septicDelaware
Delaware On-Site Wastewater Recycling Association (DOWRA)
Onsite & septicFlorida
Florida Onsite Wastewater Association (FOWA)
Onsite & septicGeorgia
Georgia Onsite Wastewater Association (GOWA)
Onsite & septicHawaii
Hawaii Onsite Water Recycling Association (HOWRA)
Onsite & septicJoined NOWRA in 2026; website coming soon.
Indiana
Indiana Onsite Wastewater Professionals Association (IOWPA)
Onsite & septicIowa
Iowa Onsite Waste Water Association (IOWWA)
Onsite & septicKansas
Kansas Small Flows Association (KSFA)
Onsite & septicKansas Rural Water Association (KRWA)
Water & wastewaterKentucky
Kentucky Onsite Wastewater Association (KOWA)
Onsite & septicKentucky Water & Wastewater Operators Association (KWWOA)
Water & wastewaterLouisiana
Louisiana Rural Water Association (LRWA)
Water & wastewaterMaine
Maine Association of Wastewater Transporters
Pumpers & haulersMaryland
Maryland Onsite Wastewater Professional Association (MOWPA)
Onsite & septicWastewater Environment Contractors Association
Onsite & septicMassachusetts
Massachusetts Association of Sewerage Pumping Contractors
Pumpers & haulersMichigan
Michigan Onsite Wastewater Recycling Association (MOWRA)
Onsite & septicMichigan Septic Tank Association (MSTA)
Pumpers & haulersMinnesota
Minnesota Onsite Wastewater Association (MOWA)
Onsite & septicMississippi
Mississippi Rural Water Association (MsRWA)
Water & wastewaterMissouri
Missouri Smallflows Organization (MSO)
Onsite & septicMontana
Montana Onsite Wastewater Association
Onsite & septicNebraska
Nebraska On-site Waste Water Association (NOWWA)
Onsite & septicNevada
Nevada Water Environment Association (NWEA)
Water & wastewaterNew England (CT, ME, MA, RI, VT)
Yankee Onsite Wastewater Association (YOWA)
Onsite & septicNew Hampshire
New Hampshire Association of Septage Haulers
Pumpers & haulersGranite State Onsite Wastewater Association (GSOWA)
Onsite & septicNew Jersey
New Jersey Water Association (NJWA)
Water & wastewaterNew Mexico
Professional Onsite Water Reuse Association of New Mexico (POWRA-NM)
Onsite & septicNew York
Long Island Liquid Waste Association (LILWA)
Pumpers & haulersLong Island Advanced Septic Association (LIASA)
Onsite & septicNorth Carolina
North Carolina Septic Tank Association (NCSTA)
Pumpers & haulersNorth Carolina Pumper Group
Pumpers & haulersOnsite Wastewater Professionals (OWP)
Onsite & septicNorth Dakota
North Dakota Onsite Wastewater Recycling Association (NDOWRA)
Onsite & septicOhio
Ohio Onsite Wastewater Association (OOWA)
Onsite & septicOhio Waste Haulers Association
Pumpers & haulersOklahoma
Oklahoma Onsite Wastewater Association (OOWA)
Onsite & septicOregon
Oregon Onsite Wastewater Association (O2WA)
Onsite & septicPennsylvania
Pennsylvania Septage Management Association (PSMA)
Pumpers & haulersPennsylvania Onsite Wastewater Recycling Association (POWRA)
Onsite & septicRhode Island
Rhode Island Clean Water Association (RICWA)
Water & wastewaterRhode Island Rural Water Association (RIRWA)
Water & wastewaterSouth Carolina
South Carolina Onsite Wastewater Association (SCOWA)
Onsite & septicSC Water Environment Association & SC AWWA (SC Waters) (WEASC)
Water & wastewaterSouth Dakota
South Dakota Water & Wastewater Association (SDWWA)
Water & wastewaterSouth Dakota Association of Rural Water Systems (SDARWS)
Water & wastewaterTennessee
Tennessee Onsite Wastewater Association (TnOWA)
Onsite & septicTexas
Texas Onsite Wastewater Association (TxOWA)
Onsite & septicUtah
Utah Onsite Wastewater Association (UOWA)
Onsite & septicVermont
Vermont Rural Water Association (VTRWA)
Water & wastewaterVirginia
Virginia Onsite Wastewater Recycling Association (VOWRA)
Onsite & septicWashington
Washington On-Site Sewage Association (WOSSA)
Onsite & septicWest Virginia
West Virginia Rural Water Association (WVRWA)
Water & wastewaterWisconsin
Wisconsin Liquid Waste Carriers Association (WLWCA)
Pumpers & haulersWisconsin Onsite Water Recycling Association (WOWRA)
Onsite & septicWyoming
Wyoming Association of Rural Water Systems (WARWS)
Water & wastewaterAlberta
Alberta Onsite Wastewater Management Association (AOWMA)
Onsite & septicAlberta chapter of WCOWMA.
British Columbia
WCOWMA-BC
Onsite & septicBritish Columbia chapter of WCOWMA.
Manitoba
Manitoba Onsite Wastewater Management Association (MOWMA)
Onsite & septicManitoba chapter of WCOWMA.
Ontario
Ontario Onsite Wastewater Association (OOWA)
Onsite & septicOntario Association of Sewage Industry Services (OASIS)
Pumpers & haulersSaskatchewan
Saskatchewan Onsite Wastewater Management Association (SOWMA)
Onsite & septicSaskatchewan chapter of WCOWMA.
Western Canada (BC, AB, SK, MB)
Western Canada Onsite Wastewater Management Association (WCOWMA)
Onsite & septicJoin through your provincial chapter below.
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