1NL Navajo Lake Air Monitoring Station, New Mexico | USA Environmental Monitoring

1NL Navajo Lake is an air monitoring station located at 423A Highway 539 in Navajo Dam, New Mexico. Operated by the New Mexico Environment Department, it contributes to the US EPA Air Quality System (AQS) network, which monitors criteria pollutants and other atmospheric parameters across the United States. The station's location near the Navajo Lake reservoir and the Colorado border positions it to capture regional air quality influences from both natural and anthropogenic sources. The station operates under the regulatory framework of the Clean Air Act and EPA ambient air quality standards. As part of the New Mexico Environment Department's monitoring network, it likely measures pollutants such as ozone, particulate matter (PM2.5 and PM10), nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead. The last reported sample date is September 30, 2025, indicating ongoing data collection. The station's siting in a rural area provides representative background air quality data for the Four Corners region. Environmental monitoring at this station supports public health protection by tracking air quality trends and ensuring compliance with National Ambient Air Quality Standards (NAAQS). The data collected aids in understanding regional pollution transport, especially from nearby industrial activities and wildfires. This information is vital for local communities and regulatory agencies to implement effective air quality management strategies.

The station is situated in the semi-arid Colorado Plateau region, characterized by diverse topography including mesas, canyons, and the Navajo Lake reservoir. Local air quality can be influenced by emissions from oil and gas extraction in the San Juan Basin, coal-fired power plants, and seasonal wildfires. The monitoring station's rural setting provides baseline data for assessing regional pollution transport and background ozone levels, which are critical for understanding the impacts of energy development and climate change on air quality in the Four Corners area.