Overview
NCORE - Sieben Flats is an air monitoring station in Lewis and Clark County, Montana, operated by the Montana Department of Environmental Quality. It is part of the NCORE network, providing continuous ambient air quality data.
NCORE - Sieben Flats is an air monitoring station located near I-15 Exit 209 on Sperry Drive in Lewis and Clark County, Montana, United States. The station is part of the NCORE (National Core) network, a multi-pollutant monitoring program designed to support long-term air quality trends and health research. Operated by the Montana Department of Environmental Quality, Air Quality Division, it serves as a key reference site for rural background conditions in the Northern Rockies. The station operates under the U.S. EPA's Air Quality System (AQS) framework, adhering to federal reference methods for criteria pollutants. As an NCORE site, it likely measures a comprehensive suite of pollutants including PM2.5, ozone, nitrogen oxides, sulfur dioxide, carbon monoxide, and meteorological parameters. The network emphasizes high-quality, continuous data collection to support regulatory compliance and scientific studies. The station's last reported sample date is June 30, 2025, indicating ongoing operations. Situated in a rural area of Montana, this station provides critical baseline air quality data for the region, away from major urban emission sources. Its location helps characterize background pollution levels and long-range transport of pollutants. The data supports the EPA's mission to protect public health and the environment, and contributes to national air quality assessments and climate research.
Environmental context
The Sieben Flats station is located in a rural area of Montana, providing representative background air quality data for the Northern Rockies. Its measurements help distinguish local emissions from regional and global transport. The site's inclusion in the NCORE network ensures high-quality, multi-pollutant monitoring that supports EPA regulatory programs and scientific research on air pollution trends and health impacts.
Frequently asked questions
NCORE - Sieben Flats is located near I-15 Exit 209 on Sperry Drive in Lewis and Clark County, Montana, United States.
As an NCORE air monitoring station, it measures criteria pollutants such as PM2.5, ozone, nitrogen oxides, sulfur dioxide, carbon monoxide, and meteorological parameters to support air quality assessments and research.
The station is operated by the Montana Department of Environmental Quality, Air Quality Division, under the U.S. EPA's Air Quality System.
NCORE (National Core) is a U.S. EPA network of multi-pollutant monitoring stations designed to provide long-term, high-quality data for air quality trends, health studies, and regulatory support.
This rural station provides baseline background air quality data, helping distinguish local emissions from regional transport and supporting national air quality standards and climate research.
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