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Information about air quality in the Czech Republic
Current overview of data from automated stations (non-verified data)

Updated: 2025-05-22 11:25 CEST


Basic data Locality photo
Locality: Praha 4-Chodov
Code: ACHOA
Type of measuring programme: Automated measuring program
Locality owner: Czech Hydrometeorological Institute
Classification
Abbreviation: B/U/RN
Localization
Coordinates: 50° 1´ 48.614" North latitude 14° 31´ 2.821" East longitude
Altitude: 300 m

Actual measured level of air pollution

Actual unverified data

Date and time Air quality SO₂ NO₂ PM₁₀ O₃ PM₁₀ - from model O₃ - from model
3h average 3h average 3h average 3h average 3h average 3h average
µg∙m⁻³ µg∙m⁻³ µg∙m⁻³ µg∙m⁻³ µg∙m⁻³ µg∙m⁻³
2025-05-21 09:00 - 12:00 CEST 2A 6.8 17.8 65.8
2025-05-21 10:00 - 13:00 CEST 2A 4.9 15.8 89.0
2025-05-21 11:00 - 14:00 CEST 2A 3.8 9.2 104.8
2025-05-21 12:00 - 15:00 CEST 2A 4.9 5.6 108.1
2025-05-21 13:00 - 16:00 CEST 2B 6.5 7.5 106.7
2025-05-21 14:00 - 17:00 CEST 2B 8.4 9.1 102.8
2025-05-21 15:00 - 18:00 CEST 2A 9.0 9.5 100.8
2025-05-21 16:00 - 19:00 CEST 2A 9.0 9.8 100.3
2025-05-21 17:00 - 20:00 CEST 2A 9.8 9.4 99.3
2025-05-21 18:00 - 21:00 CEST 2A 10.9 9.2 90.3
2025-05-21 19:00 - 22:00 CEST 2A 12.9 5.9 76.4
2025-05-21 20:00 - 23:00 CEST 2A 13.9 4.5 67.2
2025-05-21 21:00 - 00:00 CEST 1B 12.2 3.8 65.1
2025-05-21 22:00 - 01:00 CEST 1B 9.4 4.3 67.9
2025-05-21 23:00 - 02:00 CEST 2A 6.7 4.8 76.9
2025-05-22 00:00 - 03:00 CEST 2A 5.9 8.4 84.9
2025-05-22 01:00 - 04:00 CEST 2A 5.7 8.7 86.1
2025-05-22 02:00 - 05:00 CEST 2A 6.9 8.8 78.9
2025-05-22 03:00 - 06:00 CEST 2A 9.3 8.1 71.3
2025-05-22 04:00 - 07:00 CEST 2A 11.4 11.3 62.3
2025-05-22 05:00 - 08:00 CEST 2A 16.3 12.4 59.8
2025-05-22 06:00 - 09:00 CEST 2A 19.3 10.7 61.5
2025-05-22 07:00 - 10:00 CEST 2A 18.5 11.6 67.8
2025-05-22 08:00 - 11:00 CEST 2A 15.0 12.2 73.3

Legend

Level Index range Air quality
     1A      ≥ 0.00 and < 0.34 very good to good
     1B      ≥ 0.34 and < 0.67
     2A      ≥ 0.67 and < 1.00 acceptable
     2B      ≥ 1.00 and < 1.50
     3A      ≥ 1.50 and < 2.00 aggravated to bad
     3B      ≥ 2.00
Component is not measured, index not determined
Incomplete data


Map of station position

Map is on page with detailed information about locality