Water, Tribal & Science Division of Environmental Protection Agency posted this Solicitation on Oct 13, 2026. Responses are due Nov 8, 2026. NAICS 541715 (Research and Development in the Physical, Engineering, and Life Sciences (except Nanotechnology and Biotechnology)), product or service code AJ12 (General Science/Technology - Physical Sciences - Physics (R&D)). Set-aside: Total Small Business Set-Aside (FAR 19.5). Solicitation number 68HERW26R0102.