NIGP 50530: Chemicals (Not Otherwise Classified)

NIGP 50530 Chemicals (Not Otherwise Classified), Item tier, covers water treatment, wastewater treatment, and facility maintenance chemicals that state and local governments procure on a routine basis—sodium hypochlorite, ferric chloride, magnesium hydroxide, calcium chloride, ammonium sulfate, and specialized proprietary cleaning compounds for infrastructure protection. Recent solicitations show municipal utilities, county environmental departments, and school food authorities all buying under this code to maintain water distribution systems, control sewer odor and corrosion, treat wastewater, manage landfill condensate systems, and stock janitorial and kitchen-grade cleaning supplies. The Town of Manchester, Connecticut, appears as a repeat buyer, issuing multiple ITBs for water treatment chemicals, wastewater treatment chemicals, and liquid calcium chloride for road treatment within a concentrated timeframe (April through July 2026). Issuing bodies include water departments and municipal utilities seeking delivered chemical supplies with compliance documentation (NSF, AWWA, ANSI standards); county environmental and sanitation operations; school districts procuring food-service and facility-maintenance products; and specialized environmental contractors handling landfill and condensate system maintenance.

Geographic activity concentrates in Connecticut (Town of Manchester and City of Meriden), Florida (Sarasota County, Hillsborough County Fire Rescue, City of Dallas water utilities, and school districts), Georgia (Colquitt County and Hall County school nutrition), and California (Eastern Municipal Water District in Riverside County). Recent representative opportunities include the Town of Manchester ITB #25/26-59 for eleven water treatment chemicals due May 22, 2026; the City of Dallas 36-month ID/IQ agreement for sewer odor and corrosion control services (ferrous iron salt, ferrous chloride, bioxide additives) with an estimated contract value of $10 million, responses due June 26, 2026; Sarasota County's sole-source procurement for PES Pipe & Well Renew chemical products and cleaning services due July 15, 2026; and Eastern Municipal Water District RFP #3924 for bulk liquid ammonium sulfate 40% blend (approximately 100,000 gallons annually) with proposals due March 19, 2026. Most procurements require delivered pricing inclusive of all transportation and fuel surcharges, product certification and compliance documentation, and proof of supplier experience with municipal or utility-grade chemical supply. Contract terms typically run one to three years with firm pricing for the initial period and limited annual adjustment provisions thereafter.