Air quality comparison · Thailand, 1259 km apart
Hat Yai vs Lampang Air quality index (AQI) today
Hat Yai has cleaner air than Lampang right now: AQI 19 (Good) against 34 (Good).
Both sit in the same EPA band, so the health advice is the same for each today. Over the past 6 days, on modeled daily averages, Hat Yai averaged AQI 23 against 34, and it was the cleaner of the two on 5 of those days. Hat Yai 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.
Hat Yai19Lampang34
Head to head
Hat Yai vs Lampang at a glance
Hat Yai and Lampang are level, each ahead on 3 of 6 measures. The better figure in each row is marked.
| Hat Yai | Lampang | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 19 (better) | 34 |
| PM2.5Fine particles, µg/m³. | 3.4 (better) | 6.7 |
| Past week's averageUS AQI, 6 days. | 23 (better) | 34 |
| Forest lost since 2001Within 10 km of the center. | 4,770 ha | 285 ha (better) |
| Tree coverWithin 2 km of the center. | 15.0% | 34.0% (better) |
| Trees still neededTo reach a healthy canopy. | 47.1K | 0 (better) |
Air quality today
What is the air like in Hat Yai and Lampang right now?
Hat Yai has cleaner air than Lampang right now: AQI 19 (Good) against 34 (Good). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
Hat YaiLampang
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).
Hat Yai: Estimate · model corrected with 3 station cities within 165 km, e.g. Alor Setar and Sungai Petani. Data: Open-Meteo / CAMS, corrected with 3 ground-station cities within 165 km, US EPA index.
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, Hat Yai averaged AQI 23 against 34, and it was the cleaner of the two on 5 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
- Hat Yai5Lampang1
- Average AQI
- Hat Yai23Lampang34
- Worst day, AQI
- Hat Yai32Lampang56
The daily numbers (6 days)
| Day | Hat Yai | Lampang |
|---|---|---|
| Nov 5 | 32 | 54 |
| Nov 6 | 31 | 56 |
| Nov 7 | 19 | 28 |
| Nov 8 | 19 | 28 |
| Nov 9 | 17 | 26 |
| Nov 10 | 21 | 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 Hat Yai and Lampang today?
Air quality is satisfactory for everyone. Both are in the same EPA band today (Good), so the advice is the same.
Exercise outdoors
A good day to be active outside.
Windows
Open them to air the house.
Masks
Not needed.
Air purifier
Not needed.
Against everywhere else
How do Hat Yai and Lampang compare with the rest of the world?
Right now Hat Yai's air is cleaner than 89% of the 5,420 places Airleaf tracks, and Lampang's is cleaner than 75%. Within Thailand, that is 97% and 90% of its 31 measured places.
Cleaner air than…
- Hat Yai
- Beats 89%
- Lampang
- Beats 75%
More tree cover than…
- Hat Yai
- Beats 34%
- 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, Hat Yai or Lampang?
Hat Yai has lost more: about 4,770 ha of forest within 10 km of its center from 2001 to 2025, against 285 ha around Lampang. 4,760 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: 2017, with 409 ha lost.
Worst year: 2023, with 39 ha lost.
| Hat Yai | Lampang | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | 4,770 ha | 285 ha (better) |
| Share of its forestOf what it had in 2000. | 41% | 7.2% (better) |
| Cleared for goodTurned into farms, mines or towns. | 4,760 ha | 280 ha (better) |
| Recent trend2021–2025 against the five years before. | Slowing down | Too little to call |
| Main known cause | Farms, pasture and plantations (82%) | 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.
Hat Yai
2017: satellite photo from April 2017 of a 5 × 5 km area about 7 km southeast of 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, Hat Yai or Lampang?
Lampang has more tree cover: 34.0% of the land within 2 km of its center against 15.0% around Hat Yai, or about 106,173 trees against 47,124.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Hat Yai | Lampang | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 47.1K | 106K (better) |
| Trees still neededTo reach the target. Fewer is better. | 47.1K | 0 (better) |
| CO₂ absorbed each yearBy the trees already standing. | 1.0M 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
Hat Yai vs Lampang: your questions answered
Is Hat Yai cleaner than Lampang?
On air quality, yes, right now: Hat Yai reads AQI 19 against 34, a gap of 15 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, Hat Yai averaged AQI 23 against 34, and it was the cleaner of the two on 5 of those days.
Is it safe to exercise outdoors in Hat Yai and Lampang today?
The advice is the same for both today. Air quality is satisfactory for everyone. Hat Yai reads AQI 19 and Lampang reads AQI 34.
Which has lost more forest, Hat Yai or Lampang?
Hat Yai has lost more: about 4,770 ha of forest within 10 km of its center from 2001 to 2025, against 285 ha around Lampang. 4,760 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Hat Yai or Lampang?
Lampang has more tree cover: 34.0% of the land within 2 km of its center against 15.0% around Hat Yai, or about 106,173 trees against 47,124. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Hat Yai and Lampang need?
Hat Yai needs about 47,124 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 Hat Yai 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. 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 Hat Yai 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 (Aug 3, 2026 and Jun 2, 2026), and the forest figures are published yearly.
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