NIGP 88564: Filter Aids: Diatomaceous Earth, Fuller's Earth, etc.

NIGP 88564 Filter Aids: Diatomaceous Earth, Fuller's Earth, Etc., Item, encompasses water treatment chemicals and filter media that state and local water utilities procure to support municipal potable and recycled water systems. The recent opportunities block shows water districts and city water departments soliciting microfiltration membranes, reverse osmosis membrane elements, silica dioxide sand, and broader water treatment chemical suites—products functionally allied to the legacy NIGP category though the solicitations emphasize advanced filtration membranes and specialty treatment compounds rather than traditional diatomaceous earth or fuller's earth by name. Issuing bodies are predominantly municipal water districts and city water services departments; West Basin Municipal Water District in California has issued two separate solicitations in the recent window (RFQ for submerged microfiltration membranes at the Edward C. Little Water Recycling Facility and an invitation for quotations for reverse osmosis membranes at the Carson Regional Water Recycling Plant), signaling repeat procurement activity under this code for membrane replacement and system upgrades.

Recent activity clusters in California and Georgia. West Basin's two Los Angeles County solicitations (RFQ RFQTH0131 closed May 26, 2026, and IFQ IFQTH0119 closed February 26, 2026) focus on equipment replacement as installed membranes reach end of useful life; the Carson RO solicitation required delivery within 60 days of award with 0.25% evaluation credit per day for acceleration, suggesting routine capital-cycle replacement rather than emergency procurement. The City of Phoenix Water Services Department issued IFB 26-0161 for 1,000,000 pounds of silica dioxide Grade #80 sand annually over five years (sealed bids due February 3, 2026), and the City of Griffin, Georgia solicited multiple water treatment chemicals including sodium hydroxide, liquid chlorine, activated carbon, and polymers under line-item bid 26-008 (due May 28, 2026). West Basin's solicitations include SBE/LBE evaluation incentives (3% to 6% reductions for qualified small or local enterprises); all solicitations require NSF 60 and AWWA standards compliance, current business operation histories ranging from three to five years, and comprehensive insurance including pollution liability coverage for hazardous materials transport.