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Kocaeli

Moderate

Pollution ranking among 81 provinces

Kocaeli air quality today: AQI 53 (Moderate), ranked 22 of 81 provinces, dominant pollutant PM2.5. Daily data from 15 official stations with weekly trends and district detail.

53
AQI #22 / 81
Dominant Pollutant PM2.5
53
0 50 100 150 200 300 500

This Week

Pollutant averages

PM10
37.1 µg/m³
0 HKDYY limit (24h): 50 µg/m³
PM2.5
35.7 µg/m³
SO₂
12.1 µg/m³
0 HKDYY limit (1h): 350 µg/m³
NO₂
26.1 µg/m³
0 HKDYY limit (1h): 200 µg/m³
O₃
40.8 µg/m³
0 HKDYY limit (8h): 120 µg/m³
CO
920.6 µg/m³
0 HKDYY limit (8h): 10000 µg/m³

12-Week Trend

Weekly pollutant averages

PM10
68.2 µg/m³ ▼ 2.2
12w ago This week
PM2.5
29.6 µg/m³ ▼ 7.9
12w ago This week
SO₂
25.0 µg/m³ ▲ 3.9
12w ago This week
NO₂
57.5 µg/m³ ▼ 12.3
12w ago This week
O₃
36.8 µg/m³ ▲ 3.0
12w ago This week
CO
834.2 µg/m³ ▼ 61.1
12w ago This week

Monthly Comparison

This month vs. same period last year

Pollutant Current Last Year Change
CO 931.0 1392.7 -33%
NO₂ 40.0 33.3 +20%
SO₂ 14.4 16.3 -12%
PM10 52.7 96.2 -45%
PM2.5 35.0 84.8 -59%
O₃ 43.3 37.8 +15%

Stations

15 active stations

Tesis Etki Alanı - Marmara THM
Government Station
40.8115, 29.5833
9 PM10
11 NO₂
486 CO
Last updated: 2026-10-31T05:34:07.194000
Kentsel-Sanayi - Marmara THM
Government Station
40.8458, 29.4252
16 PM2.5
11 SO₂
24 O₃
Last updated: 2026-10-31T05:26:30.896000
Kentsel-Sanayi - Marmara THM
Government Station
40.7461, 29.7889
30 PM10
18 PM2.5
13 SO₂
23 NO₂
24 O₃
Last updated: 2026-10-31T05:06:37.652000
Isınma - Marmara THM
Government Station
40.7887, 29.5372
10 PM10
19 SO₂
33 NO₂
1055 CO
Last updated: 2026-10-31T05:05:34.012000
Isınma - Marmara THM
Government Station
40.7264, 29.7953
28 PM10
20 PM2.5
5 SO₂
10 NO₂
27 O₃
Last updated: 2026-10-31T05:32:58.637000

Hyperlocal monitoring for Kocaeli

The data on this page comes from official stations and shows a province wide average. Airqoon builds street scale sensor networks for enterprises, cities and industrial sites: Unit series devices, the real time Lens platform and public maps.

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