What types of masks are available and how do they work?

Washington State Department of Ecology Air Quality Map. The Air Quality Index (AQI) for pollutants including ozone and particulate matter (PM) · Current pollutant concentrations (including carbon monoxide. Air Quality Management Division. background top half background bottom half. dial legend. dial arrow. 48. AQI. Jul 12, 2021 ... To see a forecast for an Ohio city, click on a link below. Air quality forecasts are provided by State and local agencies, using US EPA's Air Quality Index ( ... The AQI is a tool that simplifies reporting air quality to the public in a nationally uniform and easy to understand manner. Apr 24, 2025 ... How do the numbers work? The index's scale runs from 0 to 500; the higher the number, the worse the air. If the index is registering less than ... No health impacts are expected when air quality is in this range. Green. Moderate, 51-100, Unusually sensitive people should consider limiting prolonged outdoor ... Jan 14, 2025 ... Public health officials say it's hard to predict where ash will travel or how air quality will be affected by harsh winds, but L.A. County ... The Air Quality Index (AQI) is a nationwide, standard method developed by the U.S. Environmental Protection Agency (EPA) for reporting daily air quality to the ... The Air Quality Index (AQI) is based on measurements of six pollutants: fine particles (PM 2.5 ), course particles (PM 10 ), ozone, sulfur dioxide, nitrogen ...