Table 1.

Pollution levels for the different stations. Average and standard deviation in the years 2015–2019.

Pollutant	Unit	Site	02/01–03/15		03/16–04/13		04/14–05/17		05/18–06/14
			Avg.	Std.	Avg.	Std.	Avg.	Std.	Avg.	Std.
NO2	[μg/m3]	TR1	51.76	23.27	43.48	22.32	36.10	19.21	32.87	15.75
		TR2	37.72	18.72	29.09	16.69	23.34	13.51	20.64	11.35
		IN1	39.41	21.28	30.36	20.48	21.59	15.96	18.59	12.38
		IN2	34.74	20.26	25.93	18.00	18.34	13.84	15.52	10.48
		RE	29.90	18.03	20.07	14.13	13.58	10.42	11.69	8.67
NO	[μg/m3]	TR1	56.94	62.70	34.23	42.09	23.83	32.23	18.15	22.15
		TR2	18.93	33.76	7.30	13.95	5.23	9.91	4.10	6.60
		IN1	33.09	51.06	14.50	27.69	7.58	16.13	5.24	9.30
		IN2	17.65	29.94	6.04	14.54	3.63	9.62	2.48	5.84
		RE	9.89	21.65	3.44	8.89	2.04	5.70	1.68	3.74
CO	[mg/m3]	TR1	0.51	0.25	0.35	0.13	0.27	0.09	0.23	0.08
		TR2	0.46	0.23	0.29	0.11	0.22	0.08	0.19	0.07
		IN1	0.51	0.28	0.33	0.15	0.24	0.09	0.20	0.06
PM10	[μg/m3]	TR1	36.04	22.64	27.63	15.46	21.07	11.97	20.64	10.14
		TR2	30.59	21.29	23.18	13.34	16.34	9.40	15.76	8.10
		IN1	35.64	23.36	27.92	17.69	18.88	11.71	17.92	9.52
		IN2	29.48	20.76	23.71	13.93	17.37	10.33	17.26	9.07
		RE	26.46	18.92	22.96	14.10	16.61	12.27	16.16	9.55