Updated: 2026-04-11 19:26 CEST

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Locality

Basic data		Locality photo
Locality:	Ondrejov
Code:	SONRA
Type of measuring programme:	Automated measuring program
Locality owner:	Czech Hydrometeorological Institute
Classification
Abbreviation:	B/R/N-REG
Localization
Coordinates:	49° 54´ 48.647" North latitude 14° 46´ 57.451" East longitude
Altitude:	514 m

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Actual measured level of air pollution

Actual unverified data

Date and time	SO₂		NO₂	CO	O₃		PM₁₀		PM₂.₅
	1h	24h average	1h	8h average	1h	8h average	1h	24h average	1h
	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³	µg∙m⁻³
2026-04-10 19:00 - 20:00 CEST					52.1	66.0
2026-04-10 20:00 - 21:00 CEST					40.1	62.4
2026-04-10 21:00 - 22:00 CEST					34.3	57.8
2026-04-10 22:00 - 23:00 CEST					31.7	52.7
2026-04-10 23:00 - 00:00 CEST					29.5	47.0
2026-04-11 00:00 - 01:00 CEST					24.9	41.6
2026-04-11 01:00 - 02:00 CEST					31.7	37.5
2026-04-11 02:00 - 03:00 CEST					47.7	36.5
2026-04-11 03:00 - 04:00 CEST					51.3	36.4
2026-04-11 04:00 - 05:00 CEST					50.7	37.7
2026-04-11 05:00 - 06:00 CEST					46.7	39.3
2026-04-11 06:00 - 07:00 CEST					49.1	41.5
2026-04-11 07:00 - 08:00 CEST					59.7	45.2
2026-04-11 08:00 - 09:00 CEST					66.4	50.4
2026-04-11 09:00 - 10:00 CEST					67.0	54.8
2026-04-11 10:00 - 11:00 CEST					69.4	57.5
2026-04-11 11:00 - 12:00 CEST					74.0	60.4
2026-04-11 12:00 - 13:00 CEST					78.2	63.8
2026-04-11 13:00 - 14:00 CEST					89.2	69.1
2026-04-11 14:00 - 15:00 CEST					94.0	74.7
2026-04-11 15:00 - 16:00 CEST					98.0	79.5
2026-04-11 16:00 - 17:00 CEST					99.4	83.7
2026-04-11 17:00 - 18:00 CEST					99.4	87.7
2026-04-11 18:00 - 19:00 CEST					95.8	91.0

Legend

Color	Description
	Component is not measured
	Incomplete data
	Limit exceeded

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Map of station position

Map is on page with detailed information about locality