Full formScience
AQOstands forAir Quality Objective
Full Form of AQO
What is AQO?
An Air Quality Objective (AQO) is a legally or guideline-defined target concentration of an air pollutant that should not be exceeded over a specified averaging period to protect human health and the environment. In India, AQOs are established by the Central Pollution Control Board (CPCB) under the National Ambient Air Quality Standards (NAAQS). These objectives cover key pollutants such as PM2.5, PM10, nitrogen dioxide, sulfur dioxide, ozone, and carbon monoxide. AQOs serve as benchmarks for air quality management, enabling authorities to assess pollution levels, plan mitigation strategies, and evaluate the effectiveness of interventions like the National Clean Air Programme (NCAP). They are used by state pollution control boards, urban local bodies, and researchers to monitor compliance and alert the public during episodes of poor air quality. For students preparing for competitive exams like UPSC, GATE, or state-level environmental exams, understanding AQOs is crucial because questions often appear on environmental standards and India's air quality policies. AQOs differ from the Air Quality Index (AQI) in that AQOs are specific pollutant thresholds, while AQI translates multiple pollutant levels into a single composite score. Regular revision of AQOs reflects evolving scientific understanding and stricter public health goals.
AQO का फुल फॉर्म
वायु गुणवत्ता उद्देश्य
Example
The revised AQO for PM2.5 in residential areas across India now stands at 40 µg/m³ averaged over 24 hours.
AQO — frequently asked questions
What is the full form of AQO?
AQO stands for Air Quality Objective, which is a target concentration of an air pollutant set to protect human health and the environment.
What is the difference between AQI and AQO?
AQI (Air Quality Index) is a composite index that communicates overall air quality based on multiple pollutants, while AQO is a specific threshold for an individual pollutant, such as a 24-hour limit for PM2.5.
How are AQOs set in India?
AQOs in India are set by the Central Pollution Control Board (CPCB) under the National Ambient Air Quality Standards (NAAQS), which are revised periodically and used for compliance monitoring.