Updated: 2025-01-22 04:29 CET

---

Basic data
Locality:	Ostrava-Nova Ves-areal OVak
Code:	TONVA
Type of measuring programme:	Automated measuring program
Locality owner:	ZU, MSK
Classification
Abbreviation:	T/U/IAN
Localization
Coordinates:	49° 49´ 26.693" North latitude 18° 14´ 5.796" East longitude
Altitude:	210 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		PM₂.₅
		3h average	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		µg∙m⁻³
2025-01-21 02:00 - 05:00 CET	1A		4.0	14.7						13.0
2025-01-21 03:00 - 06:00 CET	1A		4.0	14.3						13.0
2025-01-21 04:00 - 07:00 CET	1A		4.0	14.0						12.7
2025-01-21 05:00 - 08:00 CET	1A		4.0	14.7						13.0
2025-01-21 06:00 - 09:00 CET	1A		5.7	16.3						14.0
2025-01-21 07:00 - 10:00 CET	1A		7.1	18.0						15.3
2025-01-21 08:00 - 11:00 CET	1A		7.1	18.7						15.7
2025-01-21 09:00 - 12:00 CET	1A		7.6	20.3						15.7
2025-01-21 10:00 - 13:00 CET	1A		8.4	22.7						15.7
2025-01-21 11:00 - 14:00 CET	1B		11.3	26.0						17.0
2025-01-21 12:00 - 15:00 CET	1B		13.9	27.3						17.7
2025-01-21 13:00 - 16:00 CET	1B		16.0	26.0						18.0
2025-01-21 14:00 - 17:00 CET	1B		17.6	23.7						17.3
2025-01-21 15:00 - 18:00 CET	1A		16.6	21.0						17.3
2025-01-21 16:00 - 19:00 CET	1A		15.0	21.0						18.3
2025-01-21 17:00 - 20:00 CET	1A		12.7	21.3						19.3
2025-01-21 18:00 - 21:00 CET	1A		10.5	21.7						20.0
2025-01-21 19:00 - 22:00 CET	1A		9.1	21.3						20.0
2025-01-21 20:00 - 23:00 CET	1A		8.3	21.7						20.7
2025-01-21 21:00 - 00:00 CET	1A		8.1	22.0						21.0
2025-01-21 22:00 - 01:00 CET	1A		8.5	22.3						21.0
2025-01-21 23:00 - 02:00 CET	1A		7.1	21.3						20.0
2025-01-22 00:00 - 03:00 CET	1A		5.8	21.3						20.0
2025-01-22 01:00 - 04:00 CET	1A		4.0	21.3						20.3

---

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