Air quality comparison · Thailand, 571 km apart
Chon Buri vs Lampang Air quality index (AQI) today
Lampang has cleaner air than Chon Buri right now: AQI 34 (Good) against 59 (Moderate).
That puts them in different EPA bands, so the health advice differs today. Over the past 6 days, on modeled daily averages, Lampang averaged AQI 34 against 44, and it was the cleaner of the two on 4 of those days. Lampang has lost more forest since 2001. Lampang has more tree cover.
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Chon Buri59Lampang34
Head to head
Chon Buri vs Lampang at a glance
Lampang is ahead on 5 of 6 measures, and Chon Buri on 1. The better figure in each row is marked.
| Chon Buri | Lampang | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 59 | 34 (better) |
| PM2.5Fine particles, µg/m³. | 13.3 | 6.7 (better) |
| Past week's averageUS AQI, 6 days. | 44 | 34 (better) |
| Forest lost since 2001Within 10 km of the center. | 44 ha (better) | 285 ha |
| Tree coverWithin 2 km of the center. | 22.3% | 34.0% (better) |
| Trees still neededTo reach a healthy canopy. | 18.7K | 0 (better) |
Air quality today
What is the air like in Chon Buri and Lampang right now?
Lampang has cleaner air than Chon Buri right now: AQI 34 (Good) against 59 (Moderate). PM2.5 is setting the index in both.
Chon Buri is read from a nearby ground station and Lampang is a model estimate, so the two are not quite like for like.
Chon BuriLampang
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).
Chon Buri: Ground station · Soi Bumrungsin , 4.8 km away. Data: OpenAQ · AirGradient, M Cross.
Lampang: Estimate · model corrected with 2 station cities within 245 km, e.g. อำเภอเมืองเชียงใหม่ and Muang Tonpheung. Data: Open-Meteo / CAMS, corrected with 2 ground-station cities within 245 km, US EPA index.
The past week
Which had cleaner air over the past 6 days?
Over the past 6 days, on modeled daily averages, Lampang averaged AQI 34 against 44, and it was the cleaner of the two on 4 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
- Chon Buri2Lampang4
- Average AQI
- Chon Buri44Lampang34
- Worst day, AQI
- Chon Buri59Lampang56
The daily numbers (6 days)
| Day | Chon Buri | Lampang |
|---|---|---|
| Nov 5 | 43 | 54 |
| Nov 6 | 50 | 56 |
| Nov 7 | 43 | 28 |
| Nov 8 | 59 | 28 |
| Nov 9 | 44 | 26 |
| Nov 10 | 24 | 14 |
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 Chon Buri and Lampang today?
Chon Buri (AQI 59, Moderate): Unusually sensitive people should consider limiting long outdoor exertion.
Lampang (AQI 34, Good): Air quality is satisfactory for everyone.
Exercise outdoors
- Chon Buri
- Fine for most people; unusually sensitive people should take long or hard exercise easier.
- Lampang
- A good day to be active outside.
Windows
- Chon Buri
- Fine to open; close them if you are sensitive to pollution.
- Lampang
- Open them to air the house.
Masks
- Chon Buri
- Not needed for most people.
- Lampang
- Not needed.
Air purifier
- Chon Buri
- Worth running if you are sensitive.
- Lampang
- Not needed.
Against everywhere else
How do Chon Buri and Lampang compare with the rest of the world?
Right now Chon Buri's air is cleaner than 49% of the 5,420 places Airleaf tracks, and Lampang's is cleaner than 75%. Within Thailand, that is 30% and 90% of its 31 measured places.
Cleaner air than…
- Chon Buri
- Beats 49%
- Lampang
- Beats 75%
More tree cover than…
- Chon Buri
- Beats 52%
- Lampang
- Beats 76%
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.
Deforestation · 2001–2025
Which has lost more forest, Chon Buri or Lampang?
Lampang has lost more: about 285 ha of forest within 10 km of its center from 2001 to 2025, against 44 ha around Chon Buri. 280 ha of that was cleared for good, for farms, mines or towns.
Measured within 10 km of each center, from the yearly satellite maps of forest loss: a wider circle than the one for tree cover, because forest is usually lost at a city's edges.
Worst year: 2008, with 7 ha lost.
Worst year: 2023, with 39 ha lost.
| Chon Buri | Lampang | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 44 ha (better) | 285 ha |
| Share of its forestOf what it had in 2000. | 2.4% (better) | 7.2% |
| Cleared for goodTurned into farms, mines or towns. | 40 ha (better) | 280 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Towns and roads (86%) | Farms, pasture and plantations (90%) |
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.
Chon Buri
2017: satellite photo from February 2017 of a 5 × 5 km area in the city center.
Lampang
2017: satellite photo from February 2017 of a 5 × 5 km area about 7 km east of the city center.
Trees
Which has more trees, Chon Buri or Lampang?
Lampang has more tree cover: 34.0% of the land within 2 km of its center against 22.3% around Chon Buri, or about 106,173 trees against 54,225.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Chon Buri | Lampang | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 54.2K | 106K (better) |
| Trees still neededTo reach the target. Fewer is better. | 18.7K | 0 (better) |
| CO₂ absorbed each yearBy the trees already standing. | 1.2M kg | 2.3M kg (better) |
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
Chon Buri vs Lampang: your questions answered
Is Lampang cleaner than Chon Buri?
On air quality, yes, right now: Lampang reads AQI 34 against 59, a gap of 25 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 6 days, on modeled daily averages, Lampang averaged AQI 34 against 44, and it was the cleaner of the two on 4 of those days.
Is it safe to exercise outdoors in Chon Buri and Lampang today?
In Chon Buri, at AQI 59: Unusually sensitive people should consider limiting long outdoor exertion. In Lampang, at AQI 34: Air quality is satisfactory for everyone.
Which has lost more forest, Chon Buri or Lampang?
Lampang has lost more: about 285 ha of forest within 10 km of its center from 2001 to 2025, against 44 ha around Chon Buri. 280 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Chon Buri or Lampang?
Lampang has more tree cover: 34.0% of the land within 2 km of its center against 22.3% around Chon Buri, or about 106,173 trees against 54,225. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Chon Buri and Lampang need?
Chon Buri needs about 18,723 more to reach its canopy target of 30%, and Lampang about 0 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Chon Buri and Lampang 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. Chon Buri is read from a nearby ground station and Lampang is a model estimate, so the two are not quite like for like. Nothing is adjusted for population, city limits or climate.
How often does the Chon Buri vs Lampang 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 (Jul 19, 2026 and Jun 2, 2026), and the forest figures are published yearly.
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