Jelgava vs Kohtla-Järve
Tree cover and air quality for both, measured the same way: Sentinel-2 imagery at 10 m detail over a 2 km radius from each city centre, and the live US EPA air quality index. Same radius and same index, so the two numbers compare directly.
Kohtla-Järve has more tree cover — 71.7% against 64.9%.
Jelgava has cleaner air right now — AQI 8 against 20.
- Tree cover gap
- 6.8 points
- Kohtla-Järve is ahead.
- Air quality gap
- 12 AQI
- Jelgava is cleaner.
- Trees between them
- 24.0K
- Kohtla-Järve has more standing.
Latvia
Estonia
Tree cover
Share of the 2 km radius under canopy.
64.9%
71.7%
Air quality index
US EPA index, live, with its band. Lower is better.
8 · Good
20 · Good
Trees standing
Estimated from the measured canopy area.
201K
225K
Trees still needed
To reach the same canopy target. Fewer is better.
0
0
CO₂ absorbed each year
By the trees already standing.
4.4M kg
5.0M kg
Air quality in detail
What each city is breathing
Concentrations in µg/m³, measured at the same moment as the index above. Lower is better in every row. Jelgava is read from nearby ground stations and Kohtla-Järve is modelled — worth knowing, since the two are not quite like for like.
PM2.5
Fine particles, the pollutant that usually sets the index.
2 µg/m³
2.3 µg/m³
The last week, day by day
A single reading can catch a city on a bad afternoon. The week says whether it was the weather or the place.
| Day | Jelgava | Kohtla-Järve |
|---|---|---|
| 22 Sept | 22 | 24 |
| 23 Sept | 25 | 25 |
| 24 Sept | 25 | 22 |
| 25 Sept | 24 | 22 |
| 26 Sept | 21 | 22 |
| 27 Sept | 26 | 28 |
| 28 Sept | 19 | 20 |
Reading these numbers
What is actually being measured
Tree cover
The share of ground under canopy inside a 2 km radius of each city centre, read from Sentinel-2 satellite imagery at 10 m detail. It is a measurement of that circle, not of the whole municipality — which is exactly what makes the two comparable, since city boundaries are drawn to wildly different rules around the world. Kohtla-Järve leads here at 71.7%.
Air quality index
The live US EPA index, computed from current pollutant concentrations — ground stations where a city has them nearby, and a model everywhere else. It moves hour to hour, so this is a snapshot rather than a verdict on either place: Jelgava reads 8 (good) and Kohtla-Järve reads 20 (good) right now.
Frequently asked
Jelgava and Kohtla-Järve, answered
Which has more trees, Jelgava or Kohtla-Järve?
Kohtla-Järve, with roughly 225,252 trees inside its 2 km radius against 201,239. Tree cover tells a slightly different story from raw count: Kohtla-Järve has the denser canopy at 71.7%.
Which has better air quality, Jelgava or Kohtla-Järve?
Jelgava right now, at AQI 8 against 20 — a gap of 12 points. This is a live reading rather than an annual average, so it can reverse within a day.
How many more trees does each city need?
Jelgava needs about 0 more to reach its canopy target, and Kohtla-Järve about 0. The target is the same share of ground for both, so the figures are directly comparable.
Are these two measured the same way?
Yes — that is the point of the page. Identical radius, identical satellite source at 10 m detail, and the same US EPA index for air. Nothing here is adjusted for population, city limits or climate, so the numbers describe the same-sized circle of ground in each place.
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