SmogRank / India / Tamil Nadu

Air quality in Perundurai

Tamil Nadu, India. PM2.5 from 1 reference monitor, updated hourly. None of them reported in the last 24 hours.

No readings from Perundurai's monitors in the last two weeks. The history below shows what they measured before.

Rank, worst first

24 hours–not enough data
7 days–not enough data
30 days–not enough data
This year–not enough data

Why it ranks here

Seasonal. Over the past year its worst months were December, averaging up to 41.8 µg/m³ against 0.0 in its cleanest month. Seasonal peaks usually come from heating, crop burning, fire or dust seasons.

Based on Perundurai'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: no data2025-11-02: 24.0 µg/m³2025-11-03: 24.1 µg/m³2025-11-04: no data2025-11-05: 11.9 µg/m³2025-11-06: 28.9 µg/m³2025-11-07: 46.5 µg/m³2025-11-08: no data2025-11-09: no data2025-11-10: no data2025-11-11: no data2025-11-12: no data2025-11-13: 50.3 µg/m³2025-11-14: 39.9 µg/m³2025-11-15: no data2025-11-16: no data2025-11-17: no data2025-11-18: 32.4 µg/m³2025-11-19: 19.1 µg/m³2025-11-20: 30.7 µg/m³2025-11-21: 26.4 µg/m³2025-11-22: 10.7 µg/m³2025-11-23: 11.8 µg/m³2025-11-24: 11.1 µg/m³2025-11-25: 31.1 µg/m³2025-11-26: 43.1 µg/m³2025-11-27: 40.9 µg/m³2025-11-28: 53.7 µg/m³2025-11-29: 45.3 µg/m³2025-11-30: 30.4 µg/m³2025-12-01: 18.2 µg/m³2025-12-02: 17.2 µg/m³2025-12-03: 11.9 µg/m³2025-12-04: 19.7 µg/m³2025-12-05: 29.4 µg/m³2025-12-06: 57.5 µg/m³2025-12-07: 51.0 µg/m³2025-12-08: 49.7 µg/m³2025-12-09: 47.4 µg/m³2025-12-10: 44.2 µg/m³2025-12-11: 40.5 µg/m³2025-12-12: 50.3 µg/m³2025-12-13: 42.9 µg/m³2025-12-14: 35.8 µg/m³2025-12-15: 35.0 µg/m³2025-12-16: 41.6 µg/m³2025-12-17: 14.3 µg/m³2025-12-18: 36.3 µg/m³2025-12-19: 57.8 µg/m³2025-12-20: 60.2 µg/m³2025-12-21: 57.2 µg/m³2025-12-22: 55.0 µg/m³2025-12-23: 37.1 µg/m³2025-12-24: 47.4 µg/m³2025-12-25: 51.5 µg/m³2025-12-26: 41.3 µg/m³2025-12-27: 44.7 µg/m³2025-12-28: 35.4 µg/m³2025-12-29: 45.7 µg/m³2025-12-30: 54.2 µg/m³2025-12-31: 64.4 µg/m³2026-01-01: 49.2 µg/m³2026-01-02: 27.1 µg/m³2026-01-03: no data2026-01-04: 37.3 µg/m³2026-01-05: 38.1 µg/m³2026-01-06: 49.4 µg/m³2026-01-07: 33.2 µg/m³2026-01-08: 34.1 µg/m³2026-01-09: 27.7 µg/m³2026-01-10: 36.6 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: 0.0 µg/m³2026-01-22: 0.0 µg/m³2026-01-23: 3.6 µg/m³2026-01-24: 15.9 µg/m³2026-01-25: 16.1 µg/m³2026-01-26: 16.1 µg/m³2026-01-27: 7.0 µg/m³2026-01-28: 0.0 µg/m³2026-01-29: 0.4 µg/m³2026-01-30: 0.1 µg/m³2026-01-31: 0.0 µg/m³2026-02-01: 0.0 µg/m³2026-02-02: 0.0 µg/m³2026-02-03: no data2026-02-04: no data2026-02-05: 0.0 µg/m³2026-02-06: 0.0 µg/m³2026-02-07: 0.0 µg/m³2026-02-08: no data2026-02-09: 0.0 µg/m³2026-02-10: 0.0 µg/m³2026-02-11: 0.0 µg/m³2026-02-12: 0.0 µg/m³2026-02-13: 0.4 µg/m³2026-02-14: 0.0 µg/m³2026-02-15: 0.0 µg/m³2026-02-16: no data2026-02-17: no data2026-02-18: no data2026-02-19: no data2026-02-20: 27.8 µg/m³2026-02-21: 15.4 µg/m³2026-02-22: 24.3 µg/m³2026-02-23: 28.2 µg/m³2026-02-24: no data2026-02-25: no data2026-02-26: 22.3 µg/m³2026-02-27: 0.0 µg/m³2026-02-28: 0.0 µg/m³2026-03-01: 0.0 µg/m³2026-03-02: 0.0 µg/m³2026-03-03: 0.0 µg/m³2026-03-04: 0.0 µg/m³2026-03-05: 0.0 µg/m³2026-03-06: 0.0 µg/m³2026-03-07: 0.0 µg/m³2026-03-08: 0.0 µg/m³2026-03-09: 0.0 µg/m³2026-03-10: no data2026-03-11: 0.0 µg/m³2026-03-12: 0.0 µg/m³2026-03-13: 0.0 µg/m³2026-03-14: 0.0 µg/m³2026-03-15: 0.0 µg/m³2026-03-16: 0.0 µg/m³2026-03-17: 0.0 µg/m³2026-03-18: 0.0 µg/m³2026-03-19: 0.0 µg/m³2026-03-20: 0.0 µg/m³2026-03-21: 0.0 µg/m³2026-03-22: 0.0 µg/m³2026-03-23: 0.0 µg/m³2026-03-24: 0.0 µg/m³2026-03-25: 0.0 µg/m³2026-03-26: no data2026-03-27: no data2026-03-28: no data2026-03-29: no data2026-03-30: no data2026-03-31: 0.0 µg/m³2026-04-01: 0.0 µg/m³2026-04-02: 0.0 µg/m³2026-04-03: 0.0 µg/m³2026-04-04: 0.0 µg/m³2026-04-05: 0.0 µg/m³2026-04-06: 0.0 µg/m³2026-04-07: 3.7 µg/m³2026-04-08: 29.0 µg/m³2026-04-09: 22.6 µg/m³2026-04-10: 19.5 µg/m³2026-04-11: no data2026-04-12: no data2026-04-13: no data2026-04-14: no data2026-04-15: no data2026-04-16: no data2026-04-17: 35.7 µg/m³2026-04-18: 24.9 µg/m³2026-04-19: 22.6 µg/m³2026-04-20: 25.9 µg/m³2026-04-21: 23.3 µg/m³2026-04-22: 20.0 µg/m³2026-04-23: 16.5 µg/m³2026-04-24: 20.4 µg/m³2026-04-25: 24.7 µg/m³2026-04-26: 22.3 µg/m³2026-04-27: 31.8 µg/m³2026-04-28: 37.9 µg/m³2026-04-29: 36.6 µg/m³2026-04-30: 25.6 µg/m³2026-05-01: 21.7 µg/m³2026-05-02: 22.9 µg/m³2026-05-03: 21.4 µg/m³2026-05-04: 19.6 µg/m³2026-05-05: no data2026-05-06: no data2026-05-07: 19.0 µg/m³2026-05-08: 17.5 µg/m³2026-05-09: 18.7 µg/m³2026-05-10: 15.1 µg/m³2026-05-11: 17.6 µg/m³2026-05-12: 26.0 µg/m³2026-05-13: 25.9 µg/m³2026-05-14: 28.3 µg/m³2026-05-15: 31.5 µg/m³2026-05-16: 35.3 µg/m³2026-05-17: 25.8 µg/m³2026-05-18: 15.1 µg/m³2026-05-19: 11.6 µg/m³2026-05-20: 9.3 µg/m³2026-05-21: 9.0 µg/m³2026-05-22: 4.9 µg/m³2026-05-23: 11.2 µg/m³2026-05-24: 17.4 µg/m³2026-05-25: 16.0 µg/m³2026-05-26: 14.1 µg/m³2026-05-27: 17.2 µg/m³2026-05-28: 9.8 µg/m³2026-05-29: 10.0 µg/m³2026-05-30: 12.6 µg/m³2026-05-31: 11.8 µg/m³2026-06-01: 14.8 µg/m³2026-06-02: 23.5 µg/m³2026-06-03: 13.6 µg/m³2026-06-04: 13.3 µg/m³2026-06-05: 9.8 µg/m³2026-06-06: 9.6 µg/m³2026-06-07: 5.6 µg/m³2026-06-08: no data2026-06-09: no data2026-06-10: 7.7 µg/m³2026-06-11: 13.3 µg/m³2026-06-12: 13.7 µg/m³2026-06-13: 12.8 µg/m³2026-06-14: 15.6 µg/m³2026-06-15: 12.3 µg/m³2026-06-16: 23.7 µg/m³2026-06-17: 18.0 µg/m³2026-06-18: 15.7 µg/m³2026-06-19: 16.5 µg/m³2026-06-20: 20.8 µg/m³2026-06-21: 13.5 µg/m³2026-06-22: 10.9 µg/m³2026-06-23: no data2026-06-24: no data2026-06-25: no data2026-06-26: no data2026-06-27: no data2026-06-28: no data2026-06-29: no data2026-06-30: no data2026-07-01: no data2026-07-02: no data2026-07-03: no data2026-07-04: no data2026-07-05: no data2026-07-06: no data2026-07-07: no data2026-07-08: no data2026-07-09: no data2026-07-10: no data2026-07-11: no data2026-07-12: no data2026-07-13: no data2026-07-14: no data2026-07-15: no data2026-07-16: no data2026-07-17: no data2026-07-18: no data2026-07-19: no data2026-07-20: no data2026-07-21: no data2026-07-22: no data2026-07-23: no data2026-07-24: no data2026-07-25: no data2026-07-26: no data2026-07-27: no data2026-07-28: no data2026-07-29: no data2026-07-30: no data2026-07-31: no data2026-08-01: no data2026-08-02: no data2026-08-03: no data2026-08-04: no data2026-08-05: no data2026-08-06: no data2026-08-07: no data2026-08-08: no data2026-08-09: no data2026-08-10: no data2026-08-11: no data2026-08-12: no data2026-08-13: no data2026-08-14: no data2026-08-15: no data2026-08-16: no data2026-08-17: no data2026-08-18: no data2026-08-19: no data2026-08-20: no data2026-08-21: no data2026-08-22: no data2026-08-23: no data2026-08-24: no data2026-08-25: no data2026-08-26: no data2026-08-27: no data2026-08-28: no data2026-08-29: no data2026-08-30: no data2026-08-31: no data2026-09-01: no data2026-09-02: no data2026-09-03: no data2026-09-04: no data2026-09-05: no data2026-09-06: no data2026-09-07: no data2026-09-08: no data2026-09-09: no data2026-09-10: no data2026-09-11: 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: no data2026-09-25: no data2026-09-26: no data2026-09-27: no data2026-09-28: no data2026-09-29: no data2026-09-30: no data2026-10-01: no data
117 of 213 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#2503NovDecJanFebMarAprMayJun
Rank on each day's board (1 = most polluted city that day).

2026 against 2025, month by month

15Jan 2026: 19.6 µg/m³JanFeb 2026: 6.2 µg/m³FebMar 2025: 20.6 µg/m³Mar 2026: 0.0 µg/m³MarApr 2025: 19.1 µg/m³Apr 2026: 18.5 µg/m³AprMay 2025: 17.4 µg/m³May 2026: 17.8 µg/m³MayJun 2025: 17.8 µg/m³Jun 2026: 14.2 µg/m³JunJul 2025: 14.2 µg/m³JulAug 2025: 15.8 µg/m³AugSep 2025: 17.2 µg/m³SepOct 2025: 14.4 µg/m³OctNov 2025: 30.6 µg/m³NovDec 2025: 41.8 µg/m³Dec
Faded bars: 2025. A month shows once it has 10 measured days.

Monitors

StationOperatorType
SIPCOT Industrial Park, Perundurai - 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 23:07 UTC. Values are PM2.5 in µg/m³ (fine particles), the median of each city's monitors.