Updated: 2025-12-08 04:26 CET

---

Basic data		Locality photo
Locality:	Praha 1-n. Republiky
Code:	AREPA
Type of measuring programme:	Automated measuring program
Locality owner:	Czech Hydrometeorological Institute
Classification
Abbreviation:	B/U/C
Localization
Coordinates:	50° 5´ 17.038" North latitude 14° 25´ 45.193" East longitude
Altitude:	190 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
2025-12-07 02:00 - 05:00 CET	1A		21.0	20.7
2025-12-07 03:00 - 06:00 CET	1A		19.1	12.8
2025-12-07 04:00 - 07:00 CET	1A		18.4	9.9
2025-12-07 05:00 - 08:00 CET	1A		17.6	11.8
2025-12-07 06:00 - 09:00 CET	1A		17.7	13.3
2025-12-07 07:00 - 10:00 CET	1A		17.8	14.6
2025-12-07 08:00 - 11:00 CET	1A		17.7	21.1
2025-12-07 09:00 - 12:00 CET	1B		19.0	24.2
2025-12-07 10:00 - 13:00 CET	1B		18.8	23.8
2025-12-07 11:00 - 14:00 CET	1A		18.9	14.1
2025-12-07 12:00 - 15:00 CET	1A		18.3	9.2
2025-12-07 13:00 - 16:00 CET	1A		20.5	6.8
2025-12-07 14:00 - 17:00 CET	1A		24.0	8.8
2025-12-07 15:00 - 18:00 CET	1A		28.9	14.7
2025-12-07 16:00 - 19:00 CET	1B		33.4	17.3
2025-12-07 17:00 - 20:00 CET	1B		36.5	18.0
2025-12-07 18:00 - 21:00 CET	1B		36.6	17.6
2025-12-07 19:00 - 22:00 CET	1B		33.7	19.8
2025-12-07 20:00 - 23:00 CET	1B		29.0	18.1
2025-12-07 21:00 - 00:00 CET	1A		24.9	16.6
2025-12-07 22:00 - 01:00 CET	1A		20.9	14.1
2025-12-07 23:00 - 02:00 CET	1A		17.9	16.9
2025-12-08 00:00 - 03:00 CET	1A		15.6	14.9
2025-12-08 01:00 - 04:00 CET	1A		14.0	14.0

---

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