Air quality comparison · India, 44 km apart
Coimbatore vs Tiruppur Air quality index (AQI) today
Coimbatore has cleaner air than Tiruppur right now: AQI 141 (Unhealthy for sensitive groups) against 148 (Unhealthy for sensitive groups).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 7 days, on modeled daily averages, Coimbatore averaged AQI 73 against 92, and it was the cleaner of the two on 7 of those days. Coimbatore has more tree cover.
India
AQI 141
Unhealthy for sensitive groups
Cleaner right now
- PM2.5
- 54.2 µg/m³3.6× WHO guideline
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 11, 06:30 local
India
AQI 148
Unhealthy for sensitive groups
Cleaner right now
- PM2.5
- 49.5 µg/m³3.3× WHO guideline
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 11, 12:30 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Coimbatore141Tiruppur148
Head to head
Coimbatore vs Tiruppur at a glance
Coimbatore is ahead on 4 of 5 measures, and Tiruppur on 1. The better figure in each row is marked.
| Coimbatore | Tiruppur | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 141 (better) | 148 |
| PM2.5Fine particles, µg/m³. | 54.2 | 49.5 (better) |
| Past week's averageUS AQI, 7 days. | 73 (better) | 92 |
| Tree coverWithin 2 km of the center. | 25.4% (better) | 12.4% |
| Trees still neededTo reach a healthy canopy. | 29.7K (better) | 71.0K |
Air quality today
What is the air like in Coimbatore and Tiruppur right now?
Coimbatore has cleaner air than Tiruppur right now: AQI 141 (Unhealthy for sensitive groups) against 148 (Unhealthy for sensitive groups). PM2.5 is setting the index in both.
Coimbatore's PM2.5 is about 3.6× the WHO's 24-hour guideline of 15 µg/m³. Tiruppur's PM2.5 is about 3.3× the WHO's 24-hour guideline of 15 µg/m³.
Both readings are model estimates, with no ground station close enough to either.
CoimbatoreTiruppur
Concentrations at the same moment as the index above, for the pollutants both places report. Lower is better. The dark marks on the PM2.5 and PM10 rows show the WHO's 24-hour guidelines (15 and 45 µg/m³).
Coimbatore: Estimate · model corrected with 3 station cities within 105 km, e.g. Ooty and Malappuram. Data: Open-Meteo / CAMS, corrected with 3 ground-station cities within 105 km, US EPA index.
Tiruppur: Estimate · model corrected with 3 station cities within 145 km, e.g. Ooty and Malappuram. Data: Open-Meteo / CAMS, corrected with 3 ground-station cities within 145 km, US EPA index.
The past week
Which had cleaner air over the past 7 days?
Over the past 7 days, on modeled daily averages, Coimbatore averaged AQI 73 against 92, and it was the cleaner of the two on 7 of those days. A single reading can catch a city on a bad afternoon; the week says whether it was the weather or the place.
- Cleaner days
- Coimbatore7Tiruppur0
- Average AQI
- Coimbatore73Tiruppur92
- Worst day, AQI
- Coimbatore120Tiruppur155
The daily numbers (7 days)
| Day | Coimbatore | Tiruppur |
|---|---|---|
| Nov 5 | 54 | 66 |
| Nov 6 | 49 | 60 |
| Nov 7 | 53 | 63 |
| Nov 8 | 61 | 70 |
| Nov 9 | 74 | 90 |
| Nov 10 | 103 | 142 |
| Nov 11 | 120 | 155 |
Daily averages from the CAMS atmospheric model for both places, so the week compares like with like. They can differ from today's reading at the top of the page wherever that comes from a ground station.
What it means today
Is it safe to go outside in Coimbatore and Tiruppur today?
Sensitive groups should limit long or intense outdoor activity. Both are in the same EPA band today (Unhealthy for sensitive groups), so the advice is the same.
Exercise outdoors
Children, older adults and people with asthma or heart disease should cut down long or hard exercise.
Windows
Close them to keep the outside air out.
Masks
Sensitive groups: an N95 outdoors.
Air purifier
Run one, especially in bedrooms.
Against everywhere else
How do Coimbatore and Tiruppur compare with the rest of the world?
Right now Coimbatore's air is cleaner than 12% of the 5,420 places Airleaf tracks, and Tiruppur's is cleaner than 11%. Within India, that is 54% and 51% of its 471 measured places.
Cleaner air than…
- Coimbatore
- Beats 12%
- Tiruppur
- Beats 11%
More tree cover than…
- Coimbatore
- Beats 59%
- Tiruppur
- Beats 27%
Includes model estimates as well as station readings, so it can differ from our most polluted and cleanest air rankings, which use station readings only.
Satellite timelapses
Watch both change, year by year
A clear satellite photo a year of the land around each city. Press play, turn on the forest cleared since the first year, or drag the before and after.
Coimbatore
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
Tiruppur
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Coimbatore or Tiruppur?
Coimbatore has more tree cover: 25.4% of the land within 2 km of its center against 12.4% around Tiruppur, or about 78,679 trees against 38,956.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Coimbatore | Tiruppur | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 78.7K (better) | 39.0K |
| Trees still neededTo reach the target. Fewer is better. | 29.7K (better) | 71.0K |
| CO₂ absorbed each yearBy the trees already standing. | 1.7M kg (better) | 857K kg |
Tree cover on the satellite image
The same 2 km radius around each center, with the tree cover the satellite found marked on it.
Reading these numbers
How this comparison is made
Air quality index
The US EPA index, computed from current pollutant concentrations: ground stations where a place has them nearby, and the CAMS atmospheric model everywhere else. It moves hour to hour, so it is a snapshot rather than a verdict on either place. The guideline marks are from the WHO's 2021 air quality guidelines.
Trees and forest
Tree cover is the share of ground under canopy within 2 km of each center, read from Sentinel-2 satellite imagery at 10 m detail. It measures that circle, not the whole municipality, which is what makes the two comparable. Forest loss comes from the University of Maryland's Global Forest Change maps.
More on the method on the About Airleaf page.
Frequently asked
Coimbatore vs Tiruppur: your questions answered
Is Coimbatore cleaner than Tiruppur?
On air quality, yes, right now: Coimbatore reads AQI 141 against 148, a gap of 7 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. Over the past 7 days, on modeled daily averages, Coimbatore averaged AQI 73 against 92, and it was the cleaner of the two on 7 of those days.
Is it safe to exercise outdoors in Coimbatore and Tiruppur today?
The advice is the same for both today. Sensitive groups should limit long or intense outdoor activity. Coimbatore reads AQI 141 and Tiruppur reads AQI 148.
Which has more trees, Coimbatore or Tiruppur?
Coimbatore has more tree cover: 25.4% of the land within 2 km of its center against 12.4% around Tiruppur, or about 78,679 trees against 38,956. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Coimbatore and Tiruppur need?
Coimbatore needs about 29,737 more to reach its canopy target of 35%, and Tiruppur about 71,000 to reach 35%. The target starts at 30% of the land and rises where air quality is poor.
Why can two places 44 km apart read differently?
Air changes over short distances with traffic, industry, wind and hills, and each reading comes from the nearest ground stations or, where there are none, from a regional model. A gap of a few points between neighbors is within normal variation, while a gap that crosses an EPA band is worth noticing.
Are Coimbatore and Tiruppur measured the same way?
The method is the same: the US EPA index for air, and Sentinel-2 satellite imagery at 10 m detail over an identical radius for trees. Both readings are model estimates, with no ground station close enough to either. Nothing is adjusted for population, city limits or climate.
How often does the Coimbatore vs Tiruppur comparison update?
The air readings refresh about once an hour, and each reading's local time is shown at the top of the page. Tree cover comes from the latest clear satellite image of each area (Oct 29, 2026 and Sep 29, 2026), and the forest figures are published yearly.
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