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One-third of Delhi’s annual PM2.5 pollution is secondary ammonium sulfate

Indian Express 25 Dec 2025
Resulting from coal plants, industries and agriculture .
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Secondary pollutants drive a third of PM2.5 load in Haryana, says study

The Times of India 25 Dec 2025
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Southern Haryana districts top state in secondary PM2.5 pollution: CREA

Hindustan Times 25 Dec 2025
In Gurugram, secondary particulate matter accounted for around 32.6% of the annual PM2.5 load, translating to a mean concentration of approximately 19 µg/m³ in 2024, the analysis showed ... PM2.5 values.
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Secondary particulate matter is a core driver of dangerous PM2.5 in India: CREA analysis

The Times of India 24 Dec 2025
New analysis reveals a large part of India's PM2.5 pollution forms ...
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Chennai records lower PM2.5 levels, but dust pollution remains a challenge, finds report

The Hindu 23 Dec 2025
Several locations in Chennai recorded annual average PM2.5 level well below the national standard 40 micrograms per cubic metre; the new assessment links such lower levels to meteorological factors such as sea breeze ....
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Dehradun air quality slips to ‘poor’ as AQI touches 294, PM2.5 dominant pollutant

Hindustan Times 18 Dec 2025
Dehradun recorded an Air Quality Index (AQI) of 294, with fine particulate matter (PM2.5) identified as the dominant pollutant, according to the Central Pollution Control Board’s (CPCB) bulletin released at 4 pm on Wednesday.
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Air purifiers for home office: How to pick quiet, effective units that cut PM2.5, dust ...

Hindustan Times 18 Dec 2025
The PM2.5 display offers a straightforward read on air conditions, and the four-stage system keeps day-to-day pollution in check without demanding constant adjustment ... Clear PM2.5 readings ... A PM2.5 ...
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Air quality moderates, but night-time PM2.5 spikes

The Times of India 17 Dec 2025
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PM2.5 drops to lowest level in Beijing in 1st 11 months of 2025

ECNS 17 Dec 2025
In the first 11 months of this year, the Chinese capital of Beijing recorded its lowest average concentration of fine particulate matter (PM2.5) since monitoring began, the municipal environmental authorities reported on Tuesday.
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65% of Delhi’s PM2.5 from nearby towns: Data

Hindustan Times 17 Dec 2025
Rohtak accounted for 5.06% of Delhi’s PM2.5 load, Bhiwani 3.59% and Sonipat 2.84% ... News / Cities / Delhi / 65% of Delhi’s PM2.5 from nearby towns.
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Kolkata's air quality remains 'unhealthy to very unhealthy'; PM2.5 main pollutant

The Times of India 13 Dec 2025
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PM2.5 levels stay high despite slight improvement in Delhi\u2019s AQI

Indian Express 12 Dec 2025
Data from AQI.in for the second week ...
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PM2.5 level rises beyond safe limit in Gurgaon, Teri Gram pollution hotspot

The Times of India 11 Dec 2025
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EPA 2024 Memo Clarification on the Development of Modeled Emission Rates for Precursors (MERPs) as a Tier 1 Demonstration Tool for Ozone and PM2.5 under the PSD Permitting Program (The eRulemaking Program)

Public Technologies 11 Dec 2025
... help quantify a level of impact that does not cause or contribute to a violation of the O3 and/or PM2.5 NAAQS or PM2.5 PSD increment(s), such values will need to be justified on a case-by-case basis.
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City air quality worsens as weak winds lead to surge in PM2.5 levels

The Times of India 09 Dec 2025
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