Sewer Services Trade Associations

American Public Works Association (APWA)

Professional association for public works agencies and professionals across North America; supports sewer, stormwater, and utility services via education, advocacy, and member engagement. More than 32,000 members.

https://www.apwa.org Membership: 32,000

American Water Works Association (AWWA)

Largest organization of water supply professionals worldwide; 50,000 members and 4,300 utility members that supply roughly 80% of North America’s drinking water and treat almost half of its wastewater—relevant to combined water/sewer utilities.

https://www.awwa.org Membership: 50,000

Association of State Floodplain Managers (ASFPM)

Nonprofit dedicated to reducing flood losses and improving floodplain and stormwater management—a key interface with municipal sewer and MS4 programs. Over 7,000 individual members (about 20,000 including chapters).

https://www.floods.org Membership: 7,000

California Water Environment Association (CWEA)

WEF Member Association for California’s wastewater sector; 10,000+ professionals in operations, collections systems, labs, engineering, and resource recovery; provides certifications, training, and advocacy.

https://www.cwea.org Membership: 10,000

Ductile Iron Pipe Research Association (DIPRA)

Trade association of North America’s ductile iron pressure pipe manufacturers; provides technical resources and advocacy for water and wastewater piping, including sewer force mains. Four member companies.

https://dipra.org Membership: 4

Florida Water Environment Association (FWEA)

WEF Member Association serving Florida’s clean water community; provides training, conferences, and policy engagement for wastewater and collection systems professionals. Membership exceeds 1,300.

https://www.fwea.org Membership: 1,300

Georgia Association of Water Professionals (GAWP)

Statewide association for water and wastewater professionals in Georgia—operators, engineers, stormwater managers, and utilities—offering training and networking. Over 4,000 individual members and 300+ utility/corporate members.

https://www.gawp.org Membership: 4,000

National Association of Sewer Service Companies (NASSCO)

North American trade association for sewer service companies; sets industry standards (e.g., PACP) and provides education on assessment, maintenance, and rehabilitation of underground sewer infrastructure. Nearly 700 member organizations.

https://nassco.org Membership: 700

National Municipal Stormwater Alliance (NMSA)

Alliance of state and regional organizations focused solely on MS4 stormwater programs—closely aligned with sewer/stormwater compliance and funding. Represents 26 states.

https://ms4nmsa.org Membership: 26

New England Water Environment Association (NEWEA)

Regional WEF Member Association for New England; more than 2,100 wastewater and water quality professionals advancing training, operations, and public outreach.

https://www.newea.org Membership: 2,100

New Jersey Water Environment Association (NJWEA)

State WEF Member Association dedicated to preserving and enhancing New Jersey’s water environment; approximately 2,800 members across engineering, operations, and regulatory roles.

https://www.njwea.org Membership: 2,800

New York Water Environment Association (NYWEA)

State WEF Member Association founded in 1929; about 2,400 water quality professionals advancing wastewater/collection system management and education across New York State.

https://nywea.org Membership: 2,400

North American Society for Trenchless Technology (NASTT)

Society promoting trenchless technology methods—CIPP, pipe bursting, and other techniques essential to sewer rehabilitation—with more than 2,000 members across North America.

https://nastt.org Membership: 2,000

Ohio Water Environment Association (OWEA)

WEF Member Association for Ohio; nearly 2,000 members dedicated to wastewater treatment and collection systems, with four regional sections supporting local training and events.

https://ohiowea.org Membership: 2,000

Pennsylvania Water Environment Association (PWEA)

WEF Member Association in Pennsylvania providing DEP‑accredited training and networking for wastewater operators, engineers, and utility leaders; membership around 2,000.

https://www.pwea.org Membership: 2,000

Plastics Pipe Institute (PPI)

Major North American trade association for plastic piping systems used in sewer/collection systems, stormwater, water, and other markets. Comprises over 180 member companies and associates.

https://www.plasticpipe.org Membership: 180

Utility Engineering and Surveying Institute (UESI) of ASCE

ASCE institute uniting utility, pipelines, trenchless, and surveying professionals—standards, best practices, and conferences relevant to sewer and underground utility engineering—with a community of roughly 4,000 members.

https://www.asce.org/communities/institutes-and-technical-groups/utility-engineering-and-surveying-institute Membership: 4,000

Water Environment Association of Texas (WEAT)

WEF Member Association for Texas; more than 4,800 members spanning utilities, consultants, and operators—active in collections, pretreatment, and stormwater education and advocacy.

https://www.weat.org Membership: 4,800

Water Environment Federation (WEF)

Global technical and educational society for water quality professionals—operators, engineers, utility managers—with 30,000+ members and 75 affiliated Member Associations, including those focused on wastewater collection and treatment.

https://www.wef.org Membership: 30,000

Water Research Foundation (WRF)

Nonprofit research cooperative spanning drinking water, wastewater, reuse, and stormwater; about 1,200 subscribing utilities/organizations funding and using applied research critical to sewer and collection system management.

https://www.waterrf.org Membership: 1,200