Agua Tibia Air Monitoring Station, Riverside County, California | Environmental Monitoring

Agua Tibia is an air monitoring station located in Riverside County, California, United States. It is part of the Interagency Monitoring of Protected Visual Environments (IMPROVE) network, which focuses on assessing visibility and particulate matter in protected areas. The station is operated by the National Park Service and has been actively reporting samples, with the most recent sample date recorded as February 27, 2025. As an IMPROVE site, Agua Tibia measures fine particulate matter (PM2.5) and other aerosol components to evaluate visibility impairment and air quality trends. The network operates under the regulatory framework of the US EPA's Ambient Air Quality Standards, supporting regional haze regulations and the Clean Air Act. The station's location in a rural area of Riverside County provides representative data for regional background conditions. The environmental significance of Agua Tibia lies in its contribution to understanding air quality in the southwestern United States. Data from this station helps track long-term trends in visibility and particulate pollution, informing policy decisions for air quality management. The station's continuous operation supports the IMPROVE network's goal of protecting visibility in national parks and wilderness areas.

The Agua Tibia station is situated in a rural area of Riverside County, California, within a region characterized by Mediterranean climate and occasional wildfire events. The IMPROVE network focuses on measuring criteria pollutants such as PM2.5 and PM10, as well as aerosol speciation, to assess visibility and air quality. Siting representativeness is ensured by locating stations away from local emission sources, providing background concentration data. Reporting continuity is maintained through regular sampling and data submission to the US EPA's Air Quality System.