Pilot Study Results Help States Monitor Near-Road Pollutant Concentrations

New monitoring regulations require states to establish and operate nitrogen dioxide (NO₂) and other pollutant monitors near highly-trafficked roads in major urban areas. Sonoma Technology worked with the EPA on a pilot study to help states identify candidate near-road NO₂ monitoring sites that would satisfy monitoring requirements. Data, methods, lessons learned, and experience gathered during the pilot study helped the EPA and states plan full system deployment. In addition, Sonoma Technology helped the EPA prepare its national Near-Road NO₂ Monitoring Technical Assistance Document (TAD). The TAD provides in-depth near-road monitoring technical support.