Overview
Northern Cheyenne is an air monitoring station in Rosebud County, Montana, operated by the Northern Cheyenne Tribe. It provides ambient air quality data for the region, supporting EPA regulatory compliance.
Northern Cheyenne is an air monitoring station located near Colstrip, Montana, on the Northern Cheyenne Indian Reservation. Operated by the Northern Cheyenne Tribe, the station is part of the U.S. EPA's ambient air quality monitoring network, contributing to the national Air Quality System (AQS). The station is situated in a rural area with potential influences from nearby coal mining and power generation activities. The station reports to the EPA and provides data on criteria pollutants as part of the National Ambient Air Quality Standards (NAAQS) framework. While specific parameters measured are not detailed, typical rural monitoring stations in Montana track PM2.5, PM10, ozone, and meteorological parameters. The station's last reported sample date is December 31, 2024, indicating ongoing operation. As a tribal-operated station, Northern Cheyenne plays a key role in environmental monitoring for the Northern Cheyenne Indian Reservation, supporting air quality management and public health protection. The data collected helps assess regional air quality trends and informs regulatory decisions under the Clean Air Act.
Environmental context
The Northern Cheyenne station monitors ambient air quality in a region characterized by coal mining and coal-fired power plants near Colstrip. The area is subject to emissions of sulfur dioxide, nitrogen oxides, and particulate matter. The station's siting is representative of rural background conditions with local industrial influences. Continuous reporting supports compliance with EPA's NAAQS and provides data for tribal air quality programs.
Frequently asked questions
The Northern Cheyenne air monitoring station is located near Colstrip in Rosebud County, Montana, on the Northern Cheyenne Indian Reservation. The coordinates are approximately 45.6483 N, -106.5572 W.
The station is operated by the Northern Cheyenne Tribe of the Northern Cheyenne Indian Reservation, Montana, and reports to the U.S. Environmental Protection Agency.
Typical rural air monitoring stations in Montana measure criteria pollutants such as PM2.5, PM10, ozone, and meteorological data to assess compliance with National Ambient Air Quality Standards.
The station is part of the EPA's Air Quality System (AQS), which collects ambient air quality data nationwide. Tribal stations like Northern Cheyenne help ensure representative monitoring in underserved areas.
Air monitoring on tribal lands is governed by the Clean Air Act, with tribes often receiving grants to operate stations. Data supports NAAQS compliance and informs tribal air quality management programs.
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