Inter-Tribal Environmental Council

" protect the health of Native Americans, their natural resources, and their environment"

Clean Air Program

With four air monitoring sites located within tribal jurisdictional boundaries in Oklahoma, the CNEP Clean Air Program operates one of the largest tribal air monitoring networks in the country. Criteria pollutants being monitored include ozone, carbon monoxide, sulfur dioxide, nitrogen oxides and particulate matter. Meteorological parameters monitored include temperature, humidity, wind speed and wind direction, and precipitation. They also operate a mobile monitor that rotates to various tribes and pueblos within Region 6; it is equipped to monitor ozone, particulate matter and meteorological parameters. The Stilwell site has been designated as a rural NCore site, and a Tekran continuous mercury analyzer is operated at this location. The Clean Air Program also participates in national monitoring programs such as CASTNet, IMPROVE, the Mercury Deposition Network (MDN) and the Ammonia Monitoring Network (AMoN). Past program initiatives have included GIS mapping of tribal trust land, creating an inventory of major and minor sources for ITEC member tribes, reviewing new and/or modified major source permits that have been issued by the state, and providing technical assistance and training to the member tribes related to air quality monitoring. 

The CNEP Air Program received a 2006 Clean Air Excellence Award in the category of Community Action. The award ceremony was held in May 2007 in Washington, D.C. at the National Museum of the American Indian.

For current air monitoring data, go to  For historical data from the previous 90 days, go to

To see real-time particluate matter data for the Tahlequah area, click on

To see real-time particluate matter data for the Vinita area, click on

To view educational videos developed by the EPA about air quality, health and lower-cost sensors, visit

Click on the link below to view the national air quality status and trends through 2018:

Our Nation's Air 2018

Contact information:



Clean air program sites

Mobile Monitoring Station

The CNEP Clean Air Program, acting through ITEC, utilizes a tribal mobile monitoring station capable of evaluating particulate and ozone pollution on tribal lands within EPA Region 6.  This mobile station is equipped with a continuous PM2.5, PM10 and PMc monitor (Thermo 1405-D), a continuous ozone analyzer, and meteorological equipment.  The station provides near-real-time hourly averages of particulate matter and ozone for tribal communities.  In certain areas the unit is capable of wireless data transfers for data validation and posting of data to the U.S. EPA AQS database and AIRNow websites.  Hourly particulate, meteorological and ozone measurement information will be available to the public in near-real-time.  The mobile monitoring station is available to tribes on a first come first served basis.

The last location for the mobile monitor was the Pueblo of Santa Ana (near Bernalillo, NM); the monitor was moved from the site in November 2019.  The host tribe in 2020 will be Muscogee (Creek) Nation.

CNEP mobile monitoring sites 2006 - present