SmogRank / India / Tamil Nadu

Air quality in Gummidipundi

Tamil Nadu, India. PM2.5 from 1 reference monitor, updated hourly.

105.0µg/m³
Unhealthy

Mean for 29 Sept, the most recent day with readings, 7.0× the WHO 24-hour guideline. No hourly readings have reached us since; some networks publish days late.

Rank, worst first

24 hours–not enough data
7 days#2of 2,300, at 82.1 µg/m³
30 days–not enough data
This year#14of 2,176, at 66.3 µg/m³

Why it ranks here

Chronic pollution. Its typical day over the past year was 64.7 µg/m³, 4.3× the WHO 24-hour guideline, so it ranks high most of the time, not only during events.
Seasonal. Over the past year its worst months were January, December, averaging up to 138.4 µg/m³ against 48.4 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Gummidipundi's own measurements; causes are the usual kinds for a pattern like this, not a confirmed source.

The last 12 months, day by day

1102031Nov 2025DecJan 2026FebMarAprMayJunJulAugSepOct2025-11-01: 69.3 µg/m³2025-11-02: 65.1 µg/m³2025-11-03: 60.9 µg/m³2025-11-04: no data2025-11-05: 71.8 µg/m³2025-11-06: 77.2 µg/m³2025-11-07: 86.4 µg/m³2025-11-08: 127.0 µg/m³2025-11-09: 101.0 µg/m³2025-11-10: no data2025-11-11: 90.4 µg/m³2025-11-12: 96.6 µg/m³2025-11-13: 109.0 µg/m³2025-11-14: 105.0 µg/m³2025-11-15: 107.0 µg/m³2025-11-16: 100.0 µg/m³2025-11-17: 97.1 µg/m³2025-11-18: 110.0 µg/m³2025-11-19: 151.0 µg/m³2025-11-20: 86.7 µg/m³2025-11-21: 53.1 µg/m³2025-11-22: 49.0 µg/m³2025-11-23: 63.8 µg/m³2025-11-24: 95.5 µg/m³2025-11-25: 97.2 µg/m³2025-11-26: 274.0 µg/m³2025-11-27: 117.0 µg/m³2025-11-28: 106.0 µg/m³2025-11-29: 182.0 µg/m³2025-11-30: 65.4 µg/m³2025-12-01: 33.3 µg/m³2025-12-02: 70.4 µg/m³2025-12-03: no data2025-12-04: no data2025-12-05: no data2025-12-06: 108.0 µg/m³2025-12-07: 109.0 µg/m³2025-12-08: 118.0 µg/m³2025-12-09: 118.0 µg/m³2025-12-10: 122.0 µg/m³2025-12-11: 224.0 µg/m³2025-12-12: 134.0 µg/m³2025-12-13: 128.0 µg/m³2025-12-14: 111.0 µg/m³2025-12-15: 131.0 µg/m³2025-12-16: 116.0 µg/m³2025-12-17: 80.5 µg/m³2025-12-18: 147.0 µg/m³2025-12-19: 137.0 µg/m³2025-12-20: 243.0 µg/m³2025-12-21: 159.0 µg/m³2025-12-22: 130.0 µg/m³2025-12-23: 142.0 µg/m³2025-12-24: 166.0 µg/m³2025-12-25: 150.0 µg/m³2025-12-26: 123.0 µg/m³2025-12-27: 135.0 µg/m³2025-12-28: 254.0 µg/m³2025-12-29: 141.0 µg/m³2025-12-30: 168.0 µg/m³2025-12-31: 177.0 µg/m³2026-01-01: 121.0 µg/m³2026-01-02: 127.0 µg/m³2026-01-03: 167.0 µg/m³2026-01-04: no data2026-01-05: 243.0 µg/m³2026-01-06: 228.0 µg/m³2026-01-07: 128.0 µg/m³2026-01-08: 119.0 µg/m³2026-01-09: 90.2 µg/m³2026-01-10: 89.7 µg/m³2026-01-11: no data2026-01-12: no data2026-01-13: no data2026-01-14: no data2026-01-15: no data2026-01-16: no data2026-01-17: no data2026-01-18: no data2026-01-19: no data2026-01-20: no data2026-01-21: 115.0 µg/m³2026-01-22: 118.0 µg/m³2026-01-23: 143.0 µg/m³2026-01-24: 84.9 µg/m³2026-01-25: 87.6 µg/m³2026-01-26: 45.4 µg/m³2026-01-27: 103.0 µg/m³2026-01-28: 137.0 µg/m³2026-01-29: 125.0 µg/m³2026-01-30: 148.0 µg/m³2026-01-31: 105.0 µg/m³2026-02-01: 148.0 µg/m³2026-02-02: 163.0 µg/m³2026-02-03: no data2026-02-04: no data2026-02-05: 63.5 µg/m³2026-02-06: 65.5 µg/m³2026-02-07: 65.5 µg/m³2026-02-08: no data2026-02-09: 65.7 µg/m³2026-02-10: 113.0 µg/m³2026-02-11: 114.0 µg/m³2026-02-12: 118.0 µg/m³2026-02-13: 103.0 µg/m³2026-02-14: 106.0 µg/m³2026-02-15: 101.0 µg/m³2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: 109.0 µg/m³2026-02-21: 106.0 µg/m³2026-02-22: 78.2 µg/m³2026-02-23: 43.7 µg/m³2026-02-24: 54.4 µg/m³2026-02-25: 65.1 µg/m³2026-02-26: 122.0 µg/m³2026-02-27: 110.0 µg/m³2026-02-28: 114.0 µg/m³2026-03-01: 81.3 µg/m³2026-03-02: 84.8 µg/m³2026-03-03: 120.0 µg/m³2026-03-04: 76.3 µg/m³2026-03-05: 67.6 µg/m³2026-03-06: 78.9 µg/m³2026-03-07: 75.6 µg/m³2026-03-08: 65.9 µg/m³2026-03-09: 59.3 µg/m³2026-03-10: no data2026-03-11: 80.6 µg/m³2026-03-12: 93.8 µg/m³2026-03-13: 57.8 µg/m³2026-03-14: 52.1 µg/m³2026-03-15: 56.7 µg/m³2026-03-16: 46.7 µg/m³2026-03-17: 43.0 µg/m³2026-03-18: 55.4 µg/m³2026-03-19: 32.5 µg/m³2026-03-20: 52.0 µg/m³2026-03-21: 57.0 µg/m³2026-03-22: 40.7 µg/m³2026-03-23: 43.0 µg/m³2026-03-24: 83.6 µg/m³2026-03-25: 69.6 µg/m³2026-03-26: 65.6 µg/m³2026-03-27: 69.2 µg/m³2026-03-28: 69.7 µg/m³2026-03-29: 53.3 µg/m³2026-03-30: 47.0 µg/m³2026-03-31: 45.7 µg/m³2026-04-01: 50.9 µg/m³2026-04-02: 50.3 µg/m³2026-04-03: 47.1 µg/m³2026-04-04: 50.7 µg/m³2026-04-05: 39.6 µg/m³2026-04-06: no data2026-04-07: 70.0 µg/m³2026-04-08: 65.8 µg/m³2026-04-09: 49.2 µg/m³2026-04-10: 67.4 µg/m³2026-04-11: 51.5 µg/m³2026-04-12: 43.1 µg/m³2026-04-13: 39.7 µg/m³2026-04-14: 58.6 µg/m³2026-04-15: 39.9 µg/m³2026-04-16: no data2026-04-17: 57.1 µg/m³2026-04-18: 51.2 µg/m³2026-04-19: 63.3 µg/m³2026-04-20: no data2026-04-21: 40.4 µg/m³2026-04-22: 36.7 µg/m³2026-04-23: 23.4 µg/m³2026-04-24: 28.0 µg/m³2026-04-25: 38.0 µg/m³2026-04-26: 41.3 µg/m³2026-04-27: 66.1 µg/m³2026-04-28: 56.9 µg/m³2026-04-29: 41.3 µg/m³2026-04-30: 38.2 µg/m³2026-05-01: 40.0 µg/m³2026-05-02: 38.1 µg/m³2026-05-03: 61.0 µg/m³2026-05-04: 60.3 µg/m³2026-05-05: 49.6 µg/m³2026-05-06: no data2026-05-07: 34.2 µg/m³2026-05-08: 49.3 µg/m³2026-05-09: 56.1 µg/m³2026-05-10: 33.6 µg/m³2026-05-11: 23.9 µg/m³2026-05-12: 40.5 µg/m³2026-05-13: 40.6 µg/m³2026-05-14: 53.2 µg/m³2026-05-15: 65.5 µg/m³2026-05-16: 73.8 µg/m³2026-05-17: 64.7 µg/m³2026-05-18: 45.4 µg/m³2026-05-19: 35.7 µg/m³2026-05-20: 44.6 µg/m³2026-05-21: 48.2 µg/m³2026-05-22: 49.9 µg/m³2026-05-23: 74.1 µg/m³2026-05-24: 54.8 µg/m³2026-05-25: 49.0 µg/m³2026-05-26: 52.8 µg/m³2026-05-27: 51.2 µg/m³2026-05-28: 73.3 µg/m³2026-05-29: 70.1 µg/m³2026-05-30: 62.6 µg/m³2026-05-31: 51.7 µg/m³2026-06-01: 60.8 µg/m³2026-06-02: 54.7 µg/m³2026-06-03: 40.1 µg/m³2026-06-04: 50.2 µg/m³2026-06-05: 81.5 µg/m³2026-06-06: 39.9 µg/m³2026-06-07: 38.4 µg/m³2026-06-08: 49.6 µg/m³2026-06-09: 47.1 µg/m³2026-06-10: 58.4 µg/m³2026-06-11: 57.5 µg/m³2026-06-12: 60.5 µg/m³2026-06-13: 42.8 µg/m³2026-06-14: 41.4 µg/m³2026-06-15: 48.4 µg/m³2026-06-16: 52.7 µg/m³2026-06-17: 50.6 µg/m³2026-06-18: 63.9 µg/m³2026-06-19: 47.2 µg/m³2026-06-20: 59.5 µg/m³2026-06-21: 47.0 µg/m³2026-06-22: 50.3 µg/m³2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: 38.6 µg/m³2026-06-27: 48.3 µg/m³2026-06-28: 34.2 µg/m³2026-06-29: 43.8 µg/m³2026-06-30: 54.2 µg/m³2026-07-01: 45.7 µg/m³2026-07-02: 53.4 µg/m³2026-07-03: 59.4 µg/m³2026-07-04: 78.6 µg/m³2026-07-05: 53.9 µg/m³2026-07-06: 87.5 µg/m³2026-07-07: 79.9 µg/m³2026-07-08: 68.2 µg/m³2026-07-09: 59.2 µg/m³2026-07-10: 55.5 µg/m³2026-07-11: 58.8 µg/m³2026-07-12: 47.6 µg/m³2026-07-13: 59.2 µg/m³2026-07-14: 57.6 µg/m³2026-07-15: 50.1 µg/m³2026-07-16: 54.3 µg/m³2026-07-17: 69.2 µg/m³2026-07-18: 70.5 µg/m³2026-07-19: 44.6 µg/m³2026-07-20: 44.6 µg/m³2026-07-21: 47.3 µg/m³2026-07-22: 41.3 µg/m³2026-07-23: 53.8 µg/m³2026-07-24: 59.8 µg/m³2026-07-25: 63.0 µg/m³2026-07-26: 30.9 µg/m³2026-07-27: 45.7 µg/m³2026-07-28: 63.2 µg/m³2026-07-29: 52.4 µg/m³2026-07-30: 71.6 µg/m³2026-07-31: 67.7 µg/m³2026-08-01: 43.9 µg/m³2026-08-02: 38.7 µg/m³2026-08-03: 49.9 µg/m³2026-08-04: 65.9 µg/m³2026-08-05: 62.8 µg/m³2026-08-06: 59.5 µg/m³2026-08-07: 66.2 µg/m³2026-08-08: 57.5 µg/m³2026-08-09: 49.6 µg/m³2026-08-10: 51.6 µg/m³2026-08-11: 47.2 µg/m³2026-08-12: 61.9 µg/m³2026-08-13: 81.7 µg/m³2026-08-14: 76.5 µg/m³2026-08-15: 76.0 µg/m³2026-08-16: 51.6 µg/m³2026-08-17: 50.8 µg/m³2026-08-18: 72.6 µg/m³2026-08-19: 59.7 µg/m³2026-08-20: 65.2 µg/m³2026-08-21: 66.0 µg/m³2026-08-22: 73.2 µg/m³2026-08-23: 44.6 µg/m³2026-08-24: 50.4 µg/m³2026-08-25: 71.6 µg/m³2026-08-26: 67.6 µg/m³2026-08-27: no data2026-08-28: no data2026-08-29: no data2026-08-30: 35.6 µg/m³2026-08-31: 56.7 µg/m³2026-09-01: 52.5 µg/m³2026-09-02: 51.4 µg/m³2026-09-03: 62.2 µg/m³2026-09-04: 54.2 µg/m³2026-09-05: 58.1 µg/m³2026-09-06: no data2026-09-07: 57.5 µg/m³2026-09-08: 57.3 µg/m³2026-09-09: 66.2 µg/m³2026-09-10: 83.2 µg/m³2026-09-11: no data2026-09-12: no data2026-09-13: no data2026-09-14: no data2026-09-15: no data2026-09-16: no data2026-09-17: no data2026-09-18: no data2026-09-19: no data2026-09-20: no data2026-09-21: no data2026-09-22: no data2026-09-23: no data2026-09-24: 83.4 µg/m³2026-09-25: 66.9 µg/m³2026-09-26: 69.7 µg/m³2026-09-27: 84.9 µg/m³2026-09-28: 83.9 µg/m³2026-09-29: 105.0 µg/m³2026-09-30: no data2026-10-01: no data
314 of 314 measured days were over the WHO 24-hour guideline (15 µg/m³). One row per month, one square per local day.
Good0–9.0
Moderate9.1–35.4
Sensitive groups35.5–55.4
Unhealthy55.5–125.4
Very unhealthy125.5–225.4
Hazardous225.5+

Hour by hour

No hourly readings in the last few days. The chart returns when the monitors' data arrives.

Its world rank, day by day

#1#214NovDecJanFebMarAprMayJunJulAugSep
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2026: 126.2 µg/m³JanFeb 2025: 74.6 µg/m³Feb 2026: 96.6 µg/m³FebMar 2025: 46.3 µg/m³Mar 2026: 64.2 µg/m³MarApr 2025: 32.2 µg/m³Apr 2026: 48.4 µg/m³AprMay 2025: 31.7 µg/m³May 2026: 51.6 µg/m³MayJun 2025: 34.1 µg/m³Jun 2026: 50.4 µg/m³JunJul 2025: 51.6 µg/m³Jul 2026: 57.9 µg/m³JulAug 2025: 74.3 µg/m³Aug 2026: 59.1 µg/m³AugSep 2025: 79.2 µg/m³Sep 2026: 69.1 µg/m³SepOct 2025: 79.5 µg/m³OctNov 2025: 100.5 µg/m³NovDec 2025: 138.4 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

This week against past years

This weekThis week: 82.1 µg/m³82.120252025: 77.0 µg/m³77.0
Mean PM2.5 for 25 Sept to 1 Oct in each year. Dashed line: WHO 24-hour guideline.

Monitors

StationOperatorType
Anthoni Pillai Nagar, Gummidipoondi - TNPCBGODL-IndiaTamil Nadu Pollution Control BoardReference

The city's value is the median of its reference monitors each hour, when at least a third of them report (three are always enough); low-cost sensors are listed but not counted when reference monitors exist. Data via OpenAQ; licences as listed. How we rank. Embed this on your site.

Other cities in India

30-day averages, µg/m³. All of India.

Updated 2026-10-01 22:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.