Odor and volatile organic compound (VOC) pollution were characterized through a 15-month mobile monitoring campaign (January 2024–March 2025) in the Tuoketuo Industrial Park, Hohhot, Inner Mongolia, an area experiencing frequent odor complaints. A portable multi-sensor odor analyzer was deployed across ambient routes, Priority Monitoring Zones (PMZs), and 52 Priority Regulated Enterprises (PREs), covering a total distance of 4072 km. The monitoring results indicated that mean odor unit (OU, dimensionless) values were higher in PMZs at night (10.2) than during the day (8.3) and on ambient routes (7.08). Seasonal peaks occurred in summer (July–August) and winter (December), corresponding to periods of low wind speeds and temperature inversions. Spatial analysis identified recurrent odor hotspots along J Avenue (night-time anomaly probability 65 %) and at the H Street–F Road intersection (48 %). Ammonia (NH<inf>3</inf>; peak 10 mg m−3), hydrogen sulfide (H<inf>2</inf>S; peak 7.85 mg m−3), and trimethylamine (TMA) were the dominant odorants, associated mainly with biopharmaceutical, coal-chemical, corn-processing and wastewater treatment activities. Although total VOC (TVOC) concentrations were low (0.11–0.15 mg m−3), odor activity values (OAVs) highlighted TMA and methanethiol (MM) as key contributors to perceived odor impact. These findings support targeted night-time enforcement in high-risk corridors and optimization of waste-gas treatment, and motivate the adoption of OAV-based odor management beyond mass-based TVOC metrics