Ontario-Route 60 Near Road Air Monitoring Station, Ontario, California

Ontario-Route 60 Near Road is an air monitoring station located at 2330 S. Castle Harbour in Ontario, California, within San Bernardino County. The station is part of the NEAR ROAD network, which focuses on measuring air quality near major roadways to assess traffic-related pollution. It is operated by the South Coast Air Quality Management District (SCAQMD), the regulatory agency responsible for air quality in the South Coast Air Basin. The station operates under the regulatory framework of the US EPA Air Quality System (AQS), which sets standards for criteria pollutants such as ozone, particulate matter, nitrogen dioxide, and carbon monoxide. As a NEAR ROAD site, it is strategically placed to capture emissions from vehicles on Route 60, providing data on pollutant gradients and exposure near highways. The station's last reported sample date is September 30, 2025, indicating ongoing monitoring activities. This monitoring station plays a critical role in understanding the impact of traffic emissions on local air quality in Ontario, a city in the Inland Empire region. The data collected supports regulatory compliance, public health assessments, and transportation planning. By contributing to the SCAQMD's monitoring network, it helps inform policies aimed at reducing air pollution and protecting community health in Southern California.

Ontario, California, is located in the South Coast Air Basin, an area with significant air quality challenges due to high traffic volumes, industrial activity, and geographical conditions that trap pollutants. The Ontario-Route 60 Near Road station monitors criteria pollutants near a major highway, providing data on roadside exposure. This context is important for assessing the representativeness of monitoring sites and ensuring that data reflects local pollution sources, such as vehicle emissions, which are a primary contributor to ozone and particulate matter in the region.