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Nitrogen Dioxide
    Average Compared to Federal Standard .b) No. Days Exc"d
State

Source Receptor Area

Station
No.

 No. Days
of
Data		 Max Conc. In ppm
1-hour		 AAM
in
ppm		 >0.25
ppm
1-hour
No. Location
Los Angeles County
1 Central LA 087 342 .020 0.0430 0
2 NW Coast LA Co. 081 365 0.14 0.0285 0
3 SW Coast LA Co. 084 355 0.17 0.0280 0
4 S Coast LA Co. 072 364 0.20 0.0333 0
6 W Sn Fernan V 074 365 0.20 0.0260 0
7 E Sn Fernan V 069 343 0.20 0.0424 0
8 W Sn Gabrl V 088 360 0.17 0.0341 0
9 E Sn Gabrl V 1 060 356 0.13 0.0338 0
9 E Sn Gabrl V 2 591 365 0.13 0.0300 0
10 Pomona/Wlnt V1 075 364 0.15 0.0433 0
10 Pomona/Wlnt V2 108 -- -- -- --
11 S Sn Gabrl V 085 351 0.15 0.0363 0
12 S Cent L Co 084 344 0.20 0.0428 0
13 St. Clarita V 089 -- -- -- --
Orange Couty
16 N. Orange Co. 3177 361 0.15 0.0329 0
17 Cent Orange Co. 3176 363 0.13 0.0332 0
18 N. Coast Orange 3195 362 0.12 0.0199 0
19 Saddleback V 3186 -- -- -- --
Riverside County
22 Norco/Corona 4155 -- -- -- --
23 Metro Riv Co. 1 4144 322* 0.12* 0.0262* 0*
23 Metro Riv Co. 2 4146 -- -- -- --
24 Perris Valley 4149 -- -- -- --
25 Lk Elsinore 4158 308* 0.11* 0.0165* 0*
26 Temecula 4163 -- -- -- --
29 San Gorgonio Pk. 4150 -- -- -- --
30 Coachella V1** 4137 312* 0.07* 0.0158* 0
30 Coachella V2** 4157 -- -- -- --
San Bernardino County
32 NW SB V 5175 327* 0.15* 0.0341* 0*
33 SW SB V 5171 -- -- -- --
34 Cent SB V 1 5197 347 0.14 0.0365 0
34 Cent SB V 2 5203 347 0.14 0.0353 0
35 E SB V 5204 -- -- -- --
37 Cent SB Mtns 5181 -- -- -- --

District Max

   0.20 0.0433 0

ABBREVIATIONS USED IN AREA NAMES: LA = Los Angeles SB = San Bernardino Riv = Riverside Co = County
N = North S = South W = West E = East V = Valley Lk = Lake P = Pass Cent = Central
ppm - Parts Per Million parts of air, by volume. AAM = Annual Arithmetic Mean -- - Pollutant not monitored.
*Less than 12 full months of data. May not be representative.
**Salton Sea Air Basin.
b) - The federal standard is annual arithmetic mean NO2 greater than 0.0534 ppm. No location exceeded this standard.

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Last Update: 10/29/98
URL: http://www.aqmd.gov/smog/97no2.html