. 2021 Sep 1;34(4):347–356. doi: 10.1134/S1024856021040035

Table 2. .

Excess over maximum permissible ozone concentrations in the surface air layer on the territory of Russia per year (days/%)

Station	MPC_d.a			MPC_w.z	MPC_m.o
Station	1MPC	2MPC	3MPC	MPC_w.z	MPC_m.o
ОРТЕС-PR	201/70	116/40	26/9.1	25	2
ОРТЕС-P	72/21	4/1.2	0/0	3	0
SBEM Karadag	341/93	212/58	26/7.1	56	0
Obninsk	168/77	15/7	0/0	1	0
RUDN	142/42	10/2.9	0/0	42	1
KHMSS	347/100	168/96	70/20	59	0
Vyatskiye Polyany	118/82	82/23	0/0	27	1
TOR station	331/90	59/16	18/4.9	60	1
Fonovaya	281/77	50/14	0/0	0	0