During the 2015-16 fiscal year, BMW had a total of 22 members.
There were seven Sustaining members
- Centennial Water and Sanitation District
- City of Thornton
- East Cherry Creek Valley Water and Sanitation District
- Farmers Reservoir and Irrigation Company (FRICO)
- Littleton/Englewood Wastewater Treatment Plant
- Metro Water Reclamation District
- South Adams County Water and Sanitation District
There were five Active members
- Burlington Ditch Land and Reservoir Company
- City of Aurora
- City of Denver
- South Platte Coalition for Urban River Evaluation (SPCURE)
- Suncor
- United Water and Sanitation District
There were eight supporting members
