Hill Brothers Chemical Company

Hill Brothers Chemical Company Phoenix Division, doing business as Hill Brothers Chemical, supplies bulk water and wastewater treatment chemicals to Department of the Interior agencies as a prime contractor on full-and-open federal contracts, with recurring exposure to small business set-asides on a subset of task orders. The company is a for-profit manufacturer and chemical supplier based in Phoenix, Arizona, operating as a child division of the parent Hill Brothers Chemical Company; recent awards show a mixed set-aside posture, with roughly half the prime contract volume designated as total small business set-asides and the remainder competed without set-aside restrictions.

Hill Brothers Chemical's federal footprint centers on industrial and water treatment chemicals—specifically chlorine gas, sodium hypochlorite, sodium bisulfite, aluminum chloride polymer, ferric sulfate, and magnesium hydroxide—delivered to water infrastructure and wastewater treatment facilities across the western United States. The company holds four active parent indefinite delivery vehicles and blanket purchase agreements totaling $4.4 million in combined ceiling value: a $1.8 million Indefinite Delivery Contract with the Bureau of Reclamation for bulk chemical delivery to the Yuma Desalting Plant (awarded February 1, 2025, extending through January 31, 2030 and designated as a total small business set-aside); a $1.099 million single-award BPA with the National Park Service Intermountain Region for water and wastewater chemicals at Grand Canyon National Park (awarded April 27, 2026, through May 31, 2029); a $1 million single-award BPA with the NPS Intermountain Region for Grand Canyon chemical support (through April 4, 2027); and a $500,000 Indefinite Delivery Contract with the Bureau of Reclamation for Yuma Area Office bulk chemicals (through August 31, 2027). Representative task orders include a $157,005 delivery order for bulk chemicals to the Yuma Area Office (awarded February 1, 2026, ultimate completion July 31, 2026), a $229,077.98 BPA call for Grand Canyon water and wastewater chemicals (awarded January 10, 2024, through April 4, 2027), and a $201,398.21 purchase order for Grand Canyon water treatment chemicals designated as a total small business set-aside (awarded May 29, 2025, through December 15, 2025).

Customer concentration is heavily weighted to Interior Department agencies, which account for 87% of recent awards and 99% of combined potential value. The Bureau of Reclamation leads in absolute dollars ($10.3 million across 34 awards) while the NPS Intermountain Region dominates award count (45 awards, $7 million combined potential value); the two agencies together represent 79 of 105 total recent prime awards. The Department of Agriculture Animal and Plant Health Inspection Service Plant Protection and Quarantine, the International Boundary and Water Commission U.S.-Mexico, and the United States Marine Corps account for remaining activity at sub-$100 thousand scale per agency. Hill Brothers Chemical places the vast majority of work against five parent vehicles: a $808 thousand BPA with 31 task orders, a $991 thousand BPA with 6 task orders, a $567 thousand BPA with 5 task orders, a $536 thousand BPA with 15 task orders, and a $466 thousand Indefinite Delivery Contract with 5 task orders. Activity has remained flat to declining (six awards in 2022 and 2023, four in 2024, five in 2025, two in early 2026), with only two awards facing recompete within the next twenty-four months (combined potential value $386 thousand). The company operates as a prime only—no subcontract footprint is present in the source data. Hill Brothers Chemical's award category concentration sits with inorganic chemical manufacturing (NAICS 325180 and related codes, representing 47 of 105 awards) and chemical merchant wholesaling (NAICS 424690, 24 awards); the PSC concentration is nearly total on chemical commodities (97 of 105 awards under PSC 6320).