Standard air quality index

The air quality index is a piecewise linear function of the pollutant concentration. At the boundary between AQI categories, there is a discontinuous jump of one AQI unit. For example, an AQI value of represents good air quality with little potential to affect public health, while an AQI value over 3represents hazardous air quality.

An AQI value of 1generally corresponds to the national air quality standard for the pollutant, which is the level EPA has set to protect public health. The purpose of the AQI is to help people know how the local air quality impacts their health. The Clean Air Act identifies two types of national ambient air quality standards. Air quality and pollen information for over 1countries in the world.

It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. The AQI focuses on health effects you may experience within a few hours or days after breathing polluted air. Previously known as the Pollutant Standards Index , this uniform air quality index is used by state and local agencies for reporting on daily air quality to the public. Displaying up-to-date information for Europe, users can gain insights into the air quality in individual countries, regions and cities. Mexico’s Ecology and Climate Change Institute, Instituto Nacional de Ecologia y Cambio Climatico (INECC), which functions as the research arm of The Secretary of Environment, Secretaría del Medio Ambiente y Recursos Naturales (SEMARNAT), monitors air quality and manages the Air Quality National Information System.

Like the weather, it can change from day to day or even hour to hour. Read the air pollution in Vietnam, get real-time, historical and forecast PM2. Poor indoor air quality (IAQ) has been tied to symptoms like headaches, fatigue, trouble concentrating, and irritation of the eyes, nose, throat and lungs. Air Quality Index A Guide to Air Quality and Your Health Local air quality affects how you live and breathe. Federal and state ambient air quality standards have been set to protect public health and the climate.

Attainment” status for a pollutant means that the Air District meets the standard set by the U. You’ve probably heard the words “code red” air quality , especially if you live in or near an urban area. Environmental Protection Agency (federal) or California Environmental Protection Agency (state). Knowing what the color codes mean can help you protect your health and the health of your loved ones. The air pollutant index scale and terms used in describing the air quality levels are as in figure 1. How is the API calculated ? The WHO air quality guidelines offer guidance on reducing the effects on health of air pollution.

This book presents revised guideline values for the four most common air pollutants - particulate matter, ozone, nitrogen dioxide and sulfur dioxide - based on a review of the accumulated scientific evidence. Index values over 1indicate the pollutant concentration exceeds the air quality standard based on health. Oregon’s index is based on three pollutants regulated by the federal Clean Air Act: ground-level ozone, particle pollution and nitrogen dioxide.

In most cases, end users select compressed air system components by comparing technical data from various air treatment manufactures. Our goal is to ensure clean air , for both public health and the environment. NJDEP manages air quality with ambient air monitoring, inventories of sources, emission reduction plans, rules, permits, air quality modeling and risk assessment, vehicle inspections and voluntary programs to modernize fleets and promote electric vehicles.

It tells how clean or polluted the air is, and what associated health effects might be a concern for public. The Portland region sometimes violated the national air quality standard for ozone (smog) by as much as percent! In response, the European Union has developed an extensive body of legislation which establishes health based standards and objectives for a number of pollutants present in the air. The China air quality index follows this same format.

Air Quality Standards Humans can be adversely affected by exposure to air pollutants in ambient air.