NIGP 03170: Odor Control Equipment, Duct Air (Including Ozone Type)

NIGP 03170 Odor Control Equipment, Duct Air (Including Ozone Type) is an Item code that encompasses equipment and services for detecting, monitoring, and controlling airborne hazards — including hydrogen sulfide, methane, oxygen depletion, chlorine, ammonia, ozone, chlorine dioxide, and carbon monoxide — at water, wastewater, and facility infrastructure sites. State and local governments procure this code primarily as fixed atmospheric monitoring systems with sensors, controllers, alarms, calibration materials, and replacement parts for installation at lift stations, headworks buildings, chemical storage rooms, confined space entry points, process basins, and underground vaults. Issuing bodies include water and wastewater utilities, facility management departments at city and county levels, and state agencies managing multiple properties. The City of Phoenix Water Services Department and the Texas Facilities Commission are among recent active buyers; the City of Charlotte's CATS transit system has also solicited related HVAC maintenance that touches on air quality control within duct systems serving boiler and chiller equipment.

The City of Phoenix Water Services Department issued IFB 27-0435 on August 14, 2026, for atmospheric monitoring instruments with sensors to detect hazardous gases at water and wastewater facilities, with sealed offers due September 4, 2026, at 2:00 p.m. The contract runs five years from commencement with no extension options; contractors must maintain replacement parts in local stock within 48 hours of order and provide Saturday delivery capability. Qualified manufacturers include ATI, De Nora, Drager, and MSA. The Texas Facilities Commission's RFP 0007615, posted May 28, 2026, for remediation and restoration services across 81 state-owned facilities includes air duct cleaning as part of broader facility remediation, with services available 24/7 and emergency response within two hours. Recent activity clusters in the Southwest (Arizona, Texas) and extends to other states through cooperative vehicles like Sourcewell; activity is episodic rather than continuous, reflecting the capital-project and facility-maintenance cycles governing procurement under this code.