CHMU - Tabular overview of air quality of the Czech Republic

Average daily concentrations
Day/ Month	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31	X	Max	N
1	176	200	160	237	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	~	61	105	196	162.29	237.31	7.00
2	196	274	279	259	306	285	233	236	170	185	67	44	52	152	220	266	292	247	135	192	234	269	258	282	272	157	101	234	~	~	~	210.63	305.63	28.00
3	260	198	207	156	251	200	178	186	156	181	211	160	155	157	122	114	197	153	244	294	242	248	269	185	146	157	105	118	108	95	~	181.80	293.88	30.00
Quarterly and annual absolute and relative frequency of average daily concentrations partial and total air pollution indexes according to classes of IHd multiples
Quarter	concentration classes in IHd multiples																total ind.		part of it in IHd multiples														max. date
	<=1/3		<=2/3		<=1.0		<=1.5		<=2.0		<=3.0		<=4.0		>		total ind.		1/3		2/3		1.0		1.5		2.0		3.0		4.0
	concentration classes in measurement units																		part of above IHd multiples in meas. units
	0- 50		51- 100		101- 150		151- 225		226- 300		301- 450		451- 600		over 600				50		100		150		225		300		450		600
ABS.	1		4		9		27		23		1		0		0		65		64		60		51		24		1		0		0		306
REL.	1.5		6.1		13.8		41.5		35.3		1.5		0.0		0.0		100.0		98.5		92.3		78.5		36.9		1.5		0.0		0.0		5.2
ID	1		6		13		83		176		38		0		0		320
ABS.	0		0		0		0		0		0		0		0		0²		0		0		0		0		0		0		0		0
ABS.	0		0		0		0		0		0		0		0		0²		0		0		0		0		0		0		0		0
ABS.	0		0		0		0		0		0		0		0		0²		0		0		0		0		0		0		0		0
Year
ABS.	1		4		9		27		23		1		0		0		65²		64		60		51		24		1		0		0		306
REL.	1.5		6.1		13.8		41.5		35.3		1.5		0.0		0.0		100.0		98.5		92.3		78.5		36.9		1.5		0.0		0.0		5.2
ID	1		6		13		83		176		38		0		0		320
Note:				¹ frequency < 60 per quarter, or < 240 per annum
Note:				² frequency < 30 per quarter, or < 120 per annum