Science and technology
Integrated Atmospheric Chemistry and Aerosol Toxicity Analysis Laboratory (AATAL)
GS3 Environment and pollutionGS3 Science and TechnologyPrelims and Mains
- Why in news
- On 24 October 2026, Dr Jitendra Singh inaugurated AATAL, an air pollution analysis laboratory for Delhi NCR, at IITM's Delhi Branch. It is set up under Mission Mausam.
- What it is
- AATAL is a laboratory at IITM's Delhi Branch under the Ministry of Earth Sciences. It combines air measurement instruments, chemical analysis of aerosols and source apportionment. It is linked to the AIRWISE decision support system to guide air-quality management in Delhi-NCR.
- Parent mission
- AATAL has been set up under Mission Mausam of the Ministry of Earth Sciences.
- Linked system
- AATAL is integrated with IITM's AIRWISE, a decision support system that combines forecasts, observations and source-apportionment information.
- Forecast resolution
- AIRWISE gives forecasts at 400 m spatial resolution for the next 72 hours, so pollution can be assessed for pockets of Delhi.
- What it analyses
- It analyses the chemical composition of gases and aerosols, including PM2.5, metals and toxic elements.
- Users
- CAQM and other agencies can use its evidence to target interventions and to strengthen decisions under the Graded Response Action Plan (GRAP).
- Host institute
- IITM, Pune, is an autonomous institute under the Ministry of Earth Sciences.
Don’t confuse with AATAL vs AIRWISE: AATAL is the laboratory for chemical and toxicity analysis and source identification. AIRWISE is the forecasting and decision support system it is integrated with.
Don’t confuse with CAQM vs IITM: CAQM is the statutory regulator for air quality in Delhi-NCR and uses the evidence. IITM is the research institute that produces it.
Science and technology: 57 Prelims questions since 2013; most test the concept behind the news, not the news itself. In Mains, 12 news-triggered questions.
Why it matters
- Source apportionment in real time lets action target actual sources rather than general measures.
- Composition and toxicity data can inform health risk assessment of particulate pollution.
Problems
- Delhi-NCR pollution has many sources, including transported pollution, so action needs coordination across states and agencies.
- Evidence is useful only if it is turned into enforced action.
Way forward
- Use the source data to guide GRAP triggers and sector-specific measures.
- Extend similar facilities and forecasting systems to other cities.
Put in your answer
Real-time source data: At the demonstration, transport was shown contributing about 25 per cent of Delhi's pollution, at an overall level near 180.
Whole-of-government approach: The Minister said air pollution cannot be handled by one department alone, and stressed coordination among scientific, environmental, pollution-control and disaster-management bodies.
- 2021Mains GS3 · Q7Key points of revised WHO air quality guidelines and needed NCAP changes.
- 2015Mains GS1 · Q15Why is Delhi's air pollution more serious than Mumbai's and Kolkata's?
- 2020Mains GS3 · Q17Key features of the National Clean Air Programme (NCAP).
- 2024Prelims Q90Largest source of sulphur dioxide emissions according to EPA.
UPSC’s own questions that come close to this issue, from our Prelims and Mains banks.
No practice question for this one; the card may still help an answer. Why: Lasting topic under Mission Mausam on air pollution source identification, but a single facility with few testable facts; unlikely to be asked.
Worth revising until Prelims 2028: most news questions come within two years of the event.