Portland - SE Lafayette St (SEL) Air Monitoring Station | NCore, PAMS | Portland, Oregon

Portland - SE Lafayette St (SEL) is an air monitoring station located at 5824 SE Lafayette Street in Portland, Multnomah County, Oregon. It is part of the proposed NCore (National Core) network and the Photochemical Assessment Monitoring Stations (PAMS) program, making it a key facility for comprehensive ambient air quality monitoring in the Pacific Northwest. The station is operated by the Oregon Department of Environmental Quality (DEQ) and reports data as part of the U.S. EPA's Air Quality System (AQS). NCore stations are designed to measure multiple pollutants including PM2.5, PM10, ozone, nitrogen oxides, sulfur dioxide, carbon monoxide, and lead, as well as meteorological parameters. PAMS stations focus on ozone precursors and air toxics. The last sample date recorded is June 30, 2025, indicating ongoing operation. This monitoring station serves the Portland metropolitan area, providing essential data for assessing compliance with National Ambient Air Quality Standards (NAAQS) and supporting air quality management decisions. Its location in a residential area helps characterize population exposure. The data contributes to regional air quality trends analysis and public health protection.

Portland's air quality is influenced by urban emissions, industrial activity, and geographic factors such as the Columbia River Gorge. The NCore and PAMS designations ensure comprehensive monitoring of criteria pollutants and ozone precursors, supporting regulatory compliance under the Clean Air Act. The station's siting in a residential area provides representative data for population exposure assessment, while its integration into national networks enables trend analysis and policy evaluation.