Overview
GR-MONROE is an NCORE air monitoring station in Grand Rapids, Michigan, operated by the Michigan Department of Environment, Great Lakes, and Energy. It provides continuous ambient air quality data for regulatory compliance and public health assessmen
GR-MONROE is an air monitoring station located at 165 Monroe NW in Grand Rapids, Michigan, United States. It is part of the NCORE (National Core) network, which is a multi-pollutant monitoring network designed to provide long-term, high-quality data on criteria pollutants and air toxics. The station is operated by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) - Air Quality Division, and its most recent sample date is June 30, 2025. As an NCORE site, GR-MONROE measures a comprehensive suite of pollutants including ozone, particulate matter (PM2.5 and PM10), nitrogen oxides, sulfur dioxide, carbon monoxide, and lead, along with meteorological parameters. The station supports the U.S. EPA's Air Quality System (AQS) and helps Michigan comply with the National Ambient Air Quality Standards (NAAQS). The data collected is used for air quality index reporting, trend analysis, and health studies. The station serves the Grand Rapids metropolitan area, a region with industrial and urban sources of air pollution. Its location in a downtown urban setting provides representative data for population exposure. The continuous operation and NCORE designation ensure high data completeness and quality, contributing to regional air quality management and public awareness.
Environmental context
The Grand Rapids area experiences air quality challenges typical of Midwestern U.S. cities, including ozone and particulate matter from vehicle emissions, industrial activities, and regional transport. The NCORE network focuses on long-term trends and speciation, providing critical data for understanding local pollution sources and health impacts. GR-MONROE's urban siting captures population exposure, while its multi-pollutant measurements support regulatory compliance and research on air quality-climate interactions.
Frequently asked questions
GR-MONROE is located at 165 Monroe NW in Grand Rapids, Michigan, United States.
As an NCORE station, GR-MONROE measures criteria pollutants including ozone, PM2.5, PM10, nitrogen oxides, sulfur dioxide, carbon monoxide, and lead, along with meteorological parameters.
The station is operated by the Michigan Department of Environment, Great Lakes, and Energy (EGLE) - Air Quality Division.
NCORE (National Core) is a U.S. EPA multi-pollutant monitoring network that provides long-term, high-quality data on criteria pollutants and air toxics to support NAAQS compliance and health research.
GR-MONROE provides continuous data to the U.S. EPA's Air Quality System (AQS), helping Michigan assess compliance with National Ambient Air Quality Standards and inform public health advisories.
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