Westmorland Air Monitoring Station | Imperial County, California

Westmorland is an air monitoring station located at 202 W First Street in Westmorland, California, within Imperial County. Operated under the California Air Resources Board, it is part of the state's extensive ambient air quality monitoring network. The station contributes to the US EPA Air Quality System (AQS) by providing data on criteria pollutants and other parameters. The station operates under the regulatory framework of the US Clean Air Act and the California Clean Air Act. It is part of a network that includes monitoring for ozone, particulate matter, nitrogen dioxide, sulfur dioxide, carbon monoxide, and lead. The station's siting follows EPA guidelines to ensure representativeness of local air quality. Reporting continuity is maintained through regular data submissions to the AQS database. Westmorland's monitoring supports public health protection and regulatory compliance in the Imperial Valley region, which faces challenges from agricultural emissions, dust, and cross-border pollution. The data helps inform local air quality management plans and provides communities with real-time air quality information. The station's long-term operation ensures trend analysis and policy evaluation.

Imperial County experiences elevated levels of particulate matter due to agricultural activities, desert dust, and proximity to the US-Mexico border. The Westmorland station monitors criteria pollutants to assess compliance with National Ambient Air Quality Standards. Its location in a rural agricultural area provides representative data for regional air quality assessments. The station's parameter coverage includes key pollutants relevant to local sources, supporting health advisories and emission reduction strategies.