The District operates four air monitoring stations within its tri-county jurisdiction of Humboldt, Del Norte and Trinity counties:

The District operates four air monitoring stations within its tri-county jurisdiction: Jacobs Station (Humboldt County), Humboldt Hill Station (Humboldt County), Crescent City (Del Norte County), and Weaverville Station (Trinity County). Air monitoring data collected at these stations is reported to the EPA for determining compliance with the Federal Ambient Air Quality Standards.

Air quality standards are established to protect even the most sensitive individuals in our communities. There are both State of California and Federal Ambient Air Quality Standards (AAQS). These standards indicate the maximum amount of a pollutant that can be present in outdoor air without harm to the public's health. In some cases, the California AAQS is more stringent than the Federal AAQS. The…

Current AQI Notifications (PSA's, Advisories, Alerts) & Forecasts:

One of the role of the District is to collect data on the emissions of pollutants primarily from facilities (e.g. stationary sources) from within the District boundaries.

The Air Toxics "Hot Spots" Information and Assessment Act (AB 2588, 1987, Connelly) was enacted in September 1987. Under this act, stationary sources are required to report the types and quantities of certain substances their facilities routinely release into the air. Emissions of interest are those that result from the routine operation of a facility or that are predictable, including but not…

The United States Environmental Protection Agency (EPA), in cooperation with the North Coast Unified Air Quality Management District (District), has been monitoring the levels of radiation in our area for several years. A local RadNet site based in Eureka provides near real-time monitoring of radiation levels in the region.