Overview
Chatfield State Park is an air monitoring station in Roxborough Park, Colorado, operated under the US EPA Air Quality System. It provides continuous ambient air quality data for the Denver metropolitan area.
Chatfield State Park is an air monitoring station located at 11500 N. Roxborough Park Rd. in Roxborough Park, Colorado, within Douglas County. The station is part of the broader US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other atmospheric parameters to ensure compliance with National Ambient Air Quality Standards (NAAQS). Its operational status is active, with recent sampling data reported as of June 2025. The station is operated under the reporting agency Eastern Research Group, which manages data collection and quality assurance. While specific parameters measured are not detailed, typical AQS stations in Colorado monitor ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide. The site's location in a state park provides a representative background air quality measurement for the region, away from direct urban emission sources. Chatfield State Park's monitoring contributes to regional air quality management and public health protection in the Denver-Boulder area. The data supports regulatory compliance, trend analysis, and community awareness. As part of a nationwide network, it helps track progress toward cleaner air and informs policy decisions under the Clean Air Act.
Environmental context
The station's siting in a state park offers a representative background monitoring location, capturing regional air quality influenced by Denver's urban emissions, traffic, and industrial activities. Parameter coverage typically includes criteria pollutants and meteorological data, supporting both regulatory compliance and public health advisories. The site's long-term data continuity aids in trend analysis and effectiveness of emission reduction programs.
Frequently asked questions
The station is located at 11500 N. Roxborough Park Rd. in Roxborough Park, Colorado, within Douglas County, USA.
As part of the US EPA Air Quality System, the station typically measures criteria pollutants such as ozone, particulate matter (PM2.5 and PM10), carbon monoxide, sulfur dioxide, and nitrogen dioxide, though specific parameters may vary.
The station is operated under the reporting agency Eastern Research Group, which manages data collection and quality assurance for the US EPA AQS network.
The station provides continuous ambient air quality data used to assess compliance with National Ambient Air Quality Standards (NAAQS) under the Clean Air Act, supporting regulatory decisions and public health advisories.
Siting in a state park provides a representative background location away from direct emission sources, offering baseline air quality data for the region and helping to distinguish local pollution from regional transport.
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