UNSPSC 40161804: Filter aids

UNSPSC 40161804 Filter aids, a Commodity code, covers specialized membranes, chemical treatment compounds, and filtration materials that state and local water utilities procure to treat and recycle potable and recycled water. State and local water agencies—municipal water districts, city water departments, and treatment facility operators—issue these solicitations to replace aging equipment, expand treatment capacity, or maintain compliance with water quality standards. The work spans membrane replacement for microfiltration systems, chemical coagulants and flocculants for treatment trains, activated carbon for adsorption, and ancillary filter media. Issuing bodies are predominantly municipal water districts and city public works departments responsible for water recycling, treatment, and distribution infrastructure.

Recent activity appears concentrated in California and Georgia. West Basin Municipal Water District in Los Angeles County posted RFQ RFQTH0131 on June 25, 2026, seeking pre-qualified suppliers of submerged microfiltration membranes for the Edward C. Little Water Recycling Facility, with Statements of Qualifications due May 26, 2026; suppliers must demonstrate three years of municipal supply experience, provide two U.S. municipal references with minimum 3 million gallon-per-day treatment capacity, and hold NSF-60 and NSF-419 certifications. The City of Griffin, Georgia issued Invitation to Bid #26-008 on April 29, 2026, for 16 line-item water treatment chemicals including sodium hydroxide, hydrated lime, liquid chlorine, aluminum sulfate solution, activated carbon, and polymers, with bids due May 28, 2026; all chemicals require AWWA and NSF 60/61 approval, and delivery must occur within 72 hours to six treatment facilities across the city. Both solicitations reflect standard municipal procurement cycles tied to fiscal-year budgets and equipment maintenance schedules.