Overview
COACHLINE is an operational air monitoring station in Marana, Arizona, operated by the Pima County Department of Environmental Quality. It provides ambient air quality data as part of the local monitoring network.
COACHLINE is an air monitoring station located at 9597 N. Coachline Blvd in Marana, Arizona, within Pima County. Operated by the Pima County Department of Environmental Quality, this station contributes to the regional ambient air quality monitoring network. As part of the United States' extensive air monitoring infrastructure, it supports compliance with the Clean Air Act and National Ambient Air Quality Standards (NAAQS). The station collects data on criteria pollutants and other parameters to assess air quality in the Marana area. While specific measured parameters are not detailed, typical monitoring at such stations includes ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead. The data is reported regularly, with the most recent sample date recorded as June 30, 2025, indicating ongoing operation. Located in the Sonoran Desert, Marana experiences a hot arid climate with significant dust and ozone challenges. The station's data helps inform local air quality management, public health advisories, and regulatory compliance. Its location near residential and transportation corridors ensures representative sampling of population exposure. The station plays a key role in the Pima County network, which feeds into the EPA's Air Quality System (AQS) database.
Environmental context
Marana, Arizona, lies in the Sonoran Desert, where air quality is influenced by dust from dry soils, vehicle emissions, and regional ozone transport. The COACHLINE station monitors pollutants that affect public health and visibility. Its siting near a major boulevard captures traffic-related emissions, while its data supports Pima County's compliance with federal air quality standards. The station's parameter coverage and reporting continuity are critical for tracking long-term trends and episodic events like dust storms.
Frequently asked questions
The COACHLINE air monitoring station is located at 9597 N. Coachline Blvd in Marana, Arizona, within Pima County, United States.
The station is operated by the Pima County Department of Environmental Quality, which manages air quality monitoring in the region.
Typical air monitoring stations in the US measure criteria pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead.
Data from the station is used to assess compliance with the National Ambient Air Quality Standards (NAAQS) under the Clean Air Act, and is reported to the EPA's Air Quality System (AQS) database.
Marana's location in the Sonoran Desert presents challenges like dust and ozone. Monitoring helps protect public health, inform advisories, and track long-term air quality trends in a growing urban area.
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