Air quality comparison · Bolivia, 108 km apart
Oruro vs Quillacollo Air quality index (AQI) today
Quillacollo has cleaner air than Oruro right now: AQI 8 (Good) against 17 (Good).
Both sit in the same EPA band, so the health advice is the same for each today. But over the past 7 days, on modeled daily averages, Oruro averaged AQI 18 against 22, and it was the cleaner of the two on 5 of those days. Quillacollo has lost more forest since 2001. Quillacollo has more tree cover.
Bolivia
AQI 17
Good
Cleaner right now
- PM2.5
- 2.9 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 16:00 local
Bolivia
AQI 8
Good
Cleaner right now
- PM2.5
- 1.7 µg/m³
- Main pollutant
- PM2.5
- Source
- Model estimate
- Reading
- Nov 10, 14:00 local
Updated . Lower is better on the US EPA index: 0–50 is Good, above 300 is Hazardous. Measured by Airleaf.
Oruro17Quillacollo8
Head to head
Oruro vs Quillacollo at a glance
Quillacollo is ahead on 4 of 6 measures, and Oruro on 2. The better figure in each row is marked.
| Oruro | Quillacollo | |
|---|---|---|
| Air quality nowUS AQI. Lower is better. | 17 | 8 (better) |
| PM2.5Fine particles, µg/m³. | 2.9 | 1.7 (better) |
| Past week's averageUS AQI, 7 days. | 18 (better) | 22 |
| Forest lost since 2001Within 10 km of the center. | under 1 ha (better) | 18 ha |
| Tree coverWithin 2 km of the center. | 0.0% | 11.0% (better) |
| Trees still neededTo reach a healthy canopy. | 94.2K | 59.7K (better) |
Air quality today
What is the air like in Oruro and Quillacollo right now?
Quillacollo has cleaner air than Oruro right now: AQI 8 (Good) against 17 (Good). PM2.5 is setting the index in both.
Both readings are model estimates, with no ground station close enough to either.
OruroQuillacollo
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).
Oruro: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
Quillacollo: Model estimate · no ground station nearby. Data: Open-Meteo / CAMS, US EPA index.
The past week
Which had cleaner air over the past 7 days?
But over the past 7 days, on modeled daily averages, Oruro averaged AQI 18 against 22, 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
- Oruro5Quillacollo2
- Average AQI
- Oruro18Quillacollo22
- Worst day, AQI
- Oruro25Quillacollo37
The daily numbers (7 days)
| Day | Oruro | Quillacollo |
|---|---|---|
| Nov 4 | 14 | 37 |
| Nov 5 | 20 | 31 |
| Nov 6 | 9 | 17 |
| Nov 7 | 25 | 27 |
| Nov 8 | 20 | 9 |
| Nov 9 | 22 | 11 |
| Nov 10 | 14 | 25 |
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 Oruro and Quillacollo 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 Oruro and Quillacollo compare with the rest of the world?
Right now Oruro's air is cleaner than 91% of the 5,420 places Airleaf tracks, and Quillacollo's is cleaner than 97%. Within Bolivia, that is 50% and 100% of its 9 measured places.
Cleaner air than…
- Oruro
- Beats 91%
- Quillacollo
- Beats 97%
More tree cover than…
- Oruro
- Beats 0%
- Quillacollo
- Beats 24%
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, Oruro or Quillacollo?
Quillacollo has lost more: about 18 ha of forest within 10 km of its center from 2001 to 2025, against under 1 ha around Oruro. 11 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: 2001, with under 1 ha lost.
Worst year: 2003, with 2 ha lost.
| Oruro | Quillacollo | |
|---|---|---|
| Forest lost since 2001Cleared, burned or logged. | under 1 ha (better) | 18 ha |
| Cleared for goodTurned into farms, mines or towns. | under 1 ha (better) | 11 ha |
| Recent trend2021–2025 against the five years before. | Too little to call | Too little to call |
| Main known cause | Not classified | Towns and roads (32%) |
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.
Oruro
2017: satellite photo from July 2017 of a 5 × 5 km area in the city center.
Quillacollo
2017: satellite photo from August 2017 of a 5 × 5 km area in the city center.
Trees
Which has more trees, Oruro or Quillacollo?
Quillacollo has more tree cover: 11.0% of the land within 2 km of its center against 0.0% around Oruro, or about 34,558 trees against 0.
The dark mark is each place's canopy target: 30% of the land, raised where air quality is poor.
| Oruro | Quillacollo | |
|---|---|---|
| Trees standingEstimated from the canopy area. | 0 | 34.6K (better) |
| Trees still neededTo reach the target. Fewer is better. | 94.2K | 59.7K (better) |
| CO₂ absorbed each yearBy the trees already standing. | 0 kg | 760K 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
Oruro vs Quillacollo: your questions answered
Is Quillacollo cleaner than Oruro?
On air quality, yes, right now: Quillacollo reads AQI 8 against 17, a gap of 9 points on the US EPA index. This is a live reading rather than an annual average, so it can reverse within a day. But over the past 7 days, on modeled daily averages, Oruro averaged AQI 18 against 22, and it was the cleaner of the two on 5 of those days.
Is it safe to exercise outdoors in Oruro and Quillacollo today?
The advice is the same for both today. Air quality is satisfactory for everyone. Oruro reads AQI 17 and Quillacollo reads AQI 8.
Which has lost more forest, Oruro or Quillacollo?
Quillacollo has lost more: about 18 ha of forest within 10 km of its center from 2001 to 2025, against under 1 ha around Oruro. 11 ha of that was cleared for good, for farms, mines or towns.
Which has more trees, Oruro or Quillacollo?
Quillacollo has more tree cover: 11.0% of the land within 2 km of its center against 0.0% around Oruro, or about 34,558 trees against 0. Both figures describe the same-sized circle of ground around each center, not the whole municipality.
How many more trees do Oruro and Quillacollo need?
Oruro needs about 94,248 more to reach its canopy target of 30%, and Quillacollo about 59,690 to reach 30%. The target starts at 30% of the land and rises where air quality is poor.
Are Oruro and Quillacollo 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 Oruro vs Quillacollo 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 24, 2026 and Nov 3, 2026), and the forest figures are published yearly.
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