NIGP 32512: Calcium Carbonate

NIGP 32512 Calcium Carbonate, an Item code, covers bulk chemical supplies for municipal water treatment and de-icing operations that state and local governments procure on a project and seasonal basis. State and local buyers under this code source calcium carbonate and calcium chloride in liquid and solid forms for two principal use cases: water conditioning and pH adjustment in municipal water systems, and ice control on streets and public infrastructure during winter months. The City of Detroit and Clean Water Services (an Oregon water district) represent the kinds of issuing bodies active here—municipal public works departments and special-purpose water districts—each with distinct seasonal and operational procurement cycles. Scope requirements vary: Detroit's September 2026 RFQ for liquid calcium chloride ice-control supply specifies 57–62% active ingredient by weight, 24/7 facility access within 20 miles of city limits, and vendor experience of at least three years, with pricing quoted per gallon on NET 30 terms and contract duration of two years with renewal options. Clean Water Services' August 2026 ITB for calcium carbonate bulk purchase, by contrast, reflects water-treatment infrastructure needs and runs from September 2026 through June 2027.

Recent solicitation activity is concentrated in the upper Midwest and Pacific Northwest, with Detroit and Oregon the identified active jurisdictions in the current posting window. Detroit's RFQ (551467, due October 14, 2026) applies local-vendor equalization credits ranging from 1% to 5% for Detroit-based, Detroit-resident, and Detroit-headquartered certified businesses, with the lowest equalized bid winning provided equalized price does not exceed 12% above the lowest responsible bid or $100,000 (whichever is less), reflecting municipal preference for local procurement. Clean Water Services' ITB (SX3435000017660, due August 13, 2026, already closed) required electronic submission through the Bid Locker platform with no separate email notifications; vendors were expected to monitor the platform daily for amendments and addenda. Insurance requirements in the Detroit procurement include $1,000,000 combined single-limit automobile liability and Michigan statutory workers' compensation coverage. Award in both cases goes to the lowest responsible bidder meeting all specifications.