Herculaneum, North Cross Air Monitoring Station | Herculaneum, Missouri

Herculaneum, North Cross is an air monitoring station located in Herculaneum, Jefferson County, Missouri, United States. The station is operational and reports to Doe Run Herculaneum, with the most recent sample data from September 2025. It contributes to the national ambient air quality monitoring infrastructure. The station operates under the US EPA Air Quality System (AQS) framework, which sets standards for criteria pollutants such as ozone, particulate matter, carbon monoxide, sulfur dioxide, and nitrogen dioxide. Air monitoring stations like this one are typically equipped with federal reference or equivalent methods to ensure data comparability. The station's siting follows EPA guidelines to ensure representativeness of local air quality. Herculaneum is a community with historical lead smelting activity, making air monitoring particularly important for public health. The station's data supports regulatory compliance and community awareness. Continued operation ensures long-term trend analysis and helps inform local air quality management decisions.

The station's location in Herculaneum, Missouri, is near the Doe Run lead smelter, a Superfund site, making monitoring of particulate matter and lead critical. The US EPA AQS network requires stations to measure criteria pollutants, and this station likely focuses on parameters relevant to industrial emissions. Siting representativeness is key to capturing local exposure, and reporting continuity supports trend analysis for regulatory compliance.