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1997 Carbon Monoxide Summary

  Carbon Monoxide

Source Receptor Area

Station
No.
No. Days of Data Max Conc. In
ppm 1-hour
Max Conc. In
ppm 8-hour
2nd High Conc ppm
8-hour
No. Days Standard Exceeded a)
Federal

State

No. Location ³ 9.5
ppm
8-hr.
>9.0
ppm
8-hr.
>20
ppm
1-hr.
Los Angeles County
1 Central LA 087 363 9 7.9 6.0 0 0 0
2 NW Coast LA Co. 081 365 7 4.4 4.1 0 0 0
3 SW Coast LA Co. 084 358 12 10.3 8.1 1 1 0
4 S Coast LA Co. 072 365 9 6.7 6.4 0 0 0
6 W Sn Fernan V 074 362 12 9.8 9.3 1 2 0
7 E Sn Fernan V 069 353 9 7.4 7.0 0 0 0
8 W Sn Gabrl V 088 361 8 6.0 5.3 0 0 0
9 E Sn Gabrl V 1 060 356 8 4.3 4.1 0 0 0
9 E Sn Gabrl V 2 591 -- -- -- -- -- -- --
10 Pomona/Wlnt V1 075 364 8 5.0 4.9 0 0 0
10 Pomona/Wlnt V2 108 -- -- -- -- -- -- --
11 S Sn Gabrl V 085 346 9 6.2 6.0 0 0 0
12 S Cent L Co 084 364 19 17.0 15.0 14 18 0
13 St. Clarita V 089 363 7 6.8 6.3 0 0 0
Orange Couty
16 N. Orange Co. 3177 361 12 6.0 5.6 0 0 0
17 Cent Orange Co. 3176 364 8 5.8 5.6 0 0 0
18 N. Coast Orange 3195 364 7 5.8 5.0 0 0 0
19 Saddleback V 3186 365 5 3.6 2.8 0 0 0
Riverside County
22 Norco/Corona 4155 -- -- 5.8* -- -- -- --
23 Metro Riv Co. 1 4144 310* 7* 5.0 5.0* 0* 0* 0*
23 Metro Riv Co. 2 4146 364 11 -- 4.7 0 0 0
24 Perris Valley 4149 -- -- -- -- -- -- --
25 Lk Elsinore 4158 -- -- -- -- -- -- --
26 Temecula 4163 -- -- -- -- -- -- --
29 San Gorgonio Pk. 4150 -- -- -- -- -- -- --
30 Coachella V1** 4137 359 3 1.4 1.4 0 0 0
30 Coachella V2** 4157 -- -- -- -- -- -- --
San Bernardino County
32 NW SB V 5175 -- -- -- -- -- -- --
33 SW SB V 5171 -- -- -- -- -- -- --
34 Cent SB V 1 5197 -- -- -- -- -- -- --
34 Cent SB V 2 5203 323* 8* 6.0* 6.0* 0* 0* 0*
35 E SB V 5204 -- -- -- -- -- -- --
37 Cent SB Mtns 5181 -- -- -- -- -- -- --
District Max   19 17.0 17.0 14 18 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.
a) - The federal 1-hour standard (1-hour average CO > 35 ppm) was not exceeded.