NPS webcam of plume, and current and 10-day history air quality data for SO 2 and PM 2.5.Īrchived NPS HVNP air quality data can be found at: ĥ. Map showing approximate direction of the gas plume from Halema‘uma‘u and air quality conditions for SO 2 and PM 2.5 from NPS monitors inside the HVNP. Current SO 2 and PM 2.5 conditions in Hawaiʻi Volcanoes National Park Maps, current, and historical data of air quality conditions (SO 2 and PM 2.5, plus other pollutants at some locations) in the Hawaiian islands.Īnnual summaries of Hawaii air quality data can be found at: Īir Quality Index based on PM 2.5 particle real-time monitoring data.Īnd for recommended actions at specific particle concentrations (AQI)/advisory levels.Ĥ. Hawaii Department of Health (HDOH) Clean Air Branch The same color code system is used by EPA for PM 2.5 24-hour advisories. The County of Hawaiʻi, Department of Health, USGS Hawaiian Volcano Observatory and several federal agencies worked together to form a short-term SO 2 color code advisory system (see image to right), designed to alert people to volcanic SO 2 pollution in Hawaiʻi. In most areas: PM 2.5 concentrations only occasionally reach levels considered ‘unhealthy for sensitive groups,’ as defined by the EPA.Downwind areas relatively near the volcano (approximately ranging from Ocean View to Hilo): Under certain wind conditions, SO 2 can reach levels considered ‘unhealthy for sensitive groups’ as defined by the EPA.In areas close to the eruptive vents (e.g., Hawaiʻi Volcanoes National Park (HVNP) and surrounds): Under certain wind conditions, SO 2 can reach levels considered ‘unhealthy’ for the general population, as defined by the U.S.SO 2 and PM 2.5 concentrations over the last several years: In general, SO 2 and PM 2.5 are below levels considered to cause serious health effects for the general population, however, some individuals may experience symptoms from both PM 2.5 and SO 2 exposures, depending on location. Sulfur dioxide emissions from Kīlauea volcano have decreased substantially since the beginning of the 2008 Halema`uma`u eruption, resulting in less vog for the island and state. When trade winds are absent, which occurs most often during the winter months, east Hawaiʻi, the entire island, or the entire state can be impacted by vog. Consequently, the areas southwest of Kīlauea are most frequently affected by vog on Hawaiʻi Island. The most common wind patterns in the Hawaiian Islands are the northeasterly trade winds. In any location, vog concentrations are primarily dependent on the amount of volcanic emissions, the distance away from the source vents, and the wind direction and speed on a given day. The airborne concentrations of SO 2 gas and PM 2.5 (fine particles) are measured within Hawaiʻi Volcanoes National Park and across the Island of Hawai'i (see links below).
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