San Lorenzo Valley Middle School Air Monitoring Station, Felton, California

San Lorenzo Valley Middle School Air Monitoring Station is an operational air quality monitoring facility located at 7179 Hacienda Way, Felton, California, within Santa Cruz County. Operated under the Monterey Bay Unified Air Pollution Control District, this station is part of the broader US EPA Air Quality System (AQS) network, contributing to regional and national air quality monitoring efforts. The station collects ambient air quality data, including criteria pollutants and meteorological parameters, in accordance with federal and state regulations. As part of California's extensive monitoring network, it supports compliance with National Ambient Air Quality Standards (NAAQS) and provides data for public health advisories and air quality index reporting. The station's last reported sample date is June 30, 2025, indicating recent operational activity. Located in the San Lorenzo Valley, the station serves a community surrounded by redwood forests and mountainous terrain, where air quality can be influenced by wildfire smoke, wood burning, and local traffic. Its data helps inform residents about pollution levels and supports the Air District's efforts to protect public health and the environment in the Monterey Bay region.

The San Lorenzo Valley Middle School station monitors air quality in a rural-urban interface area of Santa Cruz County, where sources include residential wood burning, vehicle emissions, and occasional wildfire smoke. The station's siting is representative of community exposure in a valley setting, and its parameter coverage typically includes ozone, particulate matter, and nitrogen dioxide. Reporting continuity through the Monterey Bay Unified APCD ensures data is integrated into the EPA AQS network for regulatory compliance and public reporting.