1998 Maximum Concentrations - Gases
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|
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|
Station No. |
No. Days of Data |
Max Conc. |
Max Conc. |
Fourth High Max Conc. in ppm 8-hour |
No. Days Standard Exceeded |
||||
|
Federal |
State |
||||||||
|
No. |
Location |
> 0.12 ppm 1-hour |
> 0.08 ppm 8-hour |
> 0.09 ppm 1-hour |
|||||
|
Los Angeles County |
|||||||||
|
1 |
Central LA |
087 |
362 |
0.15 |
0.11 |
0.096 |
5 |
9 |
17 |
|
2 |
Northwest Coastal LA County |
091 |
365 |
0.13 |
0.08 |
0.070 |
1 |
0 |
7 |
|
3 |
Southwest Coastal LA County |
094 |
363 |
0.09 |
0.07 |
0.064 |
0 |
0 |
0 |
|
4 |
South Coastal LA County |
072 |
361 |
0.12 |
0.08 |
0.065 |
0 |
0 |
2 |
|
6 |
West San Fernando Valley |
074 |
365 |
0.16 |
0.12 |
0.100 |
7 |
13 |
23 |
|
7 |
East San Fernando Valley |
069 |
355 |
0.18 |
0.13 |
0.101 |
7 |
14 |
34 |
|
8 |
West San Gabriel Valley |
088 |
349 |
0.17 |
0.14 |
0.118 |
14 |
17 |
31 |
|
9 |
East San Gabriel Valley 1 |
060 |
352 |
0.20 |
0.15 |
0.126 |
19 |
23 |
43 |
|
9 |
East San Gabriel Valley 2 |
591 |
352 |
0.22 |
0.17 |
0.143 |
28 |
38 |
61 |
|
10 |
Pomona/Walnut Valley 1 |
075 |
365 |
0.18 |
0.13 |
0.120 |
18 |
21 |
41 |
|
11 |
South San Gabriel Valley |
085 |
364 |
0.18 |
0.12 |
0.103 |
10 |
13 |
31 |
|
12 |
South Central LA County |
084 |
361 |
0.09 |
0.06 |
0.051 |
0 |
0 |
0 |
|
12 |
South Central LA County |
801 |
160* |
0.13* |
0.10* |
0.085* |
1* |
4* |
7* |
|
13 |
Santa Clarita Valley |
089 |
352 |
0.18 |
0.15 |
0.128 |
16 |
35 |
38 |
|
Orange County |
|||||||||
|
16 |
North Orange County |
3177 |
365 |
0.18 |
0.11 |
0.094 |
5 |
4 |
16 |
|
17 |
Central Orange County |
3176 |
365 |
0.14 |
0.11 |
0.088 |
2 |
4 |
10 |
|
18 |
North Coastal Orange County |
3195 |
361 |
0.12 |
0.08 |
0.076 |
0 |
0 |
5 |
|
19 |
Saddleback Valley |
3186 |
355 |
0.16 |
0.11 |
0.083 |
2 |
3 |
15 |
|
Riverside County |
|||||||||
|
22 |
Norco/Corona |
4155 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
23 |
Metropolitan Riverside County 1 |
4144 |
361 |
0.20 |
0.17 |
0.136 |
32 |
57 |
70 |
|
23 |
Metropolitan Riverside County 2 |
4146 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
24 |
Perris Valley |
4149 |
365 |
0.15 |
0.13 |
0.115 |
8 |
28 |
38 |
|
25 |
Lake Elsinore |
4158 |
358 |
0.17 |
0.14 |
0.129 |
22 |
44 |
52 |
|
29 |
San Gorgonio Pass |
4150 |
181* |
0.12* |
0.10* |
0.084* |
0* |
3* |
4* |
|
29 |
Banning Airport |
5995 |
357 |
0.17 |
0.14 |
0.124 |
25 |
52 |
67 |
|
30 |
Coachella Valley 1** |
4137 |
361 |
0.17 |
0.14 |
0.109 |
8 |
38 |
40 |
|
30 |
Coachella Valley 2** |
4157 |
364 |
0.13 |
0.12 |
0.098 |
2 |
16 |
16 |
|
San Bernardino County |
|||||||||
|
32 |
Northwest San Bernardino Valley |
5175 |
364 |
0.21 |
0.17 |
0.138 |
30 |
40 |
60 |
|
33 |
Southwest San Bernardino Valley |
5171 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
34 |
Central San Bernardino Valley 1 |
5197 |
362 |
0.20 |
0.17 |
0.133 |
32 |
43 |
60 |
|
34 |
Central San Bernardino Valley 2 |
5203 |
353 |
0.21 |
0.18 |
0.145 |
39 |
50 |
65 |
|
35 |
East San Bernardino Valley |
5204 |
365 |
0.22 |
0.19 |
0.149 |
43 |
60 |
76 |
|
37 |
Central San Bernardino Mountains |
5181 |
364 |
0.24 |
0.21 |
0.190 |
57 |
97 |
97 |
|
|
District Max |
|
|
0.24 |
0.21 |
0.190 |
57 |
97 |
97 |
|
|
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|
Source/Receptor Area |
StationNo. |
No. Days of Data |
Max Conc. |
Max Conc. |
2nd High Conc. in ppm 8-hour |
No. Days Standard Exceeded a) |
|||
|
Federal |
State |
||||||||
|
No. |
Location |
>= 9.5 ppm |
> 9.0 ppm 8-hour |
> 20 ppm 1-hour |
|||||
|
Los Angeles County |
|||||||||
|
1 |
Central LA |
087 |
364 |
8 |
6.1 |
5.8 |
0 |
0 |
0 |
|
2 |
Northwest Coastal LA County |
091 |
358 |
7 |
4.5 |
4.4 |
0 |
0 |
0 |
|
3 |
Southwest Coastal LA County |
094 |
363 |
11 |
9.4 |
8.1 |
0 |
1 |
0 |
|
4 |
South Coastal LA County |
072 |
353 |
8 |
6.6 |
6.3 |
0 |
0 |
0 |
|
6 |
West San Fernando Valley |
074 |
365 |
11 |
9.3 |
7.5 |
0 |
1 |
0 |
|
7 |
East San Fernando Valley |
069 |
365 |
8 |
7.5 |
7.1 |
0 |
0 |
0 |
|
8 |
West San Gabriel Valley |
088 |
348 |
8 |
6.3 |
6.3 |
0 |
0 |
0 |
|
9 |
East San Gabriel Valley 1 |
060 |
359 |
6 |
3.9 |
3.7 |
0 |
0 |
0 |
|
9 |
East San Gabriel Valley 2 |
591 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
10 |
Pomona/Walnut Valley 1 |
075 |
325 |
10 |
7.3 |
7.3 |
0 |
0 |
0 |
|
11 |
South San Gabriel Valley |
085 |
364 |
7 |
6.1 |
5.7 |
0 |
0 |
0 |
|
12 |
South Central LA County |
084 |
357 |
17 |
13.4 |
11.4 |
10 |
11 |
0 |
|
12 |
South Central LA County |
801 |
151* |
18* |
13.5* |
12.6* |
8* |
9* |
0* |
|
13 |
Santa Clarita Valley |
089 |
350 |
8 |
3.4 |
3.3 |
0 |
0 |
0 |
|
Orange County |
|||||||||
|
16 |
North Orange County |
3177 |
365 |
15 |
6.1 |
5.9 |
0 |
0 |
0 |
|
17 |
Central Orange County |
3176 |
348 |
8 |
5.3 |
4.9 |
0 |
0 |
0 |
|
18 |
North Coastal Orange County |
3195 |
358 |
9 |
7.0 |
6.6 |
0 |
0 |
0 |
|
19 |
Saddleback Valley |
3186 |
319 |
6* |
3.1* |
2.8* |
0* |
0* |
0* |
|
Riverside County |
|||||||||
|
22 |
Norco/Corona |
4155 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
23 |
Metropolitan Riverside County 1 |
4144 |
342 |
5 |
4.6 |
4.3 |
0 |
0 |
0 |
|
23 |
Metropolitan Riverside County 2 |
4146 |
365 |
6 |
4.6 |
4.6 |
0 |
0 |
0 |
|
24 |
Perris Valley |
4149 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
25 |
Lake Elsinore |
4158 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
29 |
San Gorgonio Pass |
4150 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
29 |
Banning Airport |
5995 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
30 |
Coachella Valley 1** |
4137 |
363 |
3 |
1.6 |
1.6 |
0 |
0 |
0 |
|
30 |
Coachella Valley 2** |
4157 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
San Bernardino County |
|||||||||
|
32 |
Northwest San Bernardino Valley |
5175 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
33 |
Southwest San Bernardino Valley |
5171 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
34 |
Central San Bernardino Valley 1 |
5197 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
34 |
Central San Bernardino Valley 2 |
5203 |
360 |
6 |
4.6 |
4.6 |
0 |
0 |
0 |
|
35 |
East San Bernardino Valley |
5204 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
37 |
Central San Bernardino Mountains |
5181 |
-- |
-- |
-- |
-- |
-- |
-- |
-- |
|
|
District Max |
|
|
18 |
13.5 |
12.6 |
10 |
11 |
0 |
ppm - Parts Per Million parts of air, by volume
-- - Pollutant not monitored.
*Less than 12 full months of data. May not be representative.
**Salton Sea Air Basin.
|
|
||||||
|
Source/Receptor Area |
Station No. |
No. Days of Data |
Max Conc. |
Average Compared to Federal Standard b)AAM |
No. Days Exceeded State Standard |
|
|
No. |
Location |
|||||
|
Los Angeles County |
||||||
|
1 |
Central LA |
087 |
362 |
0.17 |
0.0398 |
0 |
|
2 |
Northwest Coastal LA County |
091 |
351 |
0.13 |
0.0270 |
0 |
|
3 |
Southwest Coastal LA County |
094 |
333 |
0.15 |
0.0295 |
0 |
|
4 |
South Coastal LA County |
072 |
349 |
0.16 |
0.0339 |
0 |
|
6 |
West San Fernando Valley |
074 |
359 |
0.14 |
0.0266 |
0 |
|
7 |
East San Fernando Valley |
069 |
365 |
0.14 |
0.0416 |
0 |
|
8 |
West San Gabriel Valley |
088 |
349 |
0.16 |
0.0351 |
0 |
|
9 |
East San Gabriel Valley 1 |
060 |
353 |
0.14 |
0.0364 |
0 |
|
9 |
East San Gabriel Valley 2 |
591 |
353 |
0.13 |
0.0276 |
0 |
|
10 |
Pomona/Walnut Valley 1 |
075 |
363 |
0.15 |
0.0433 |
0 |
|
11 |
South San Gabriel Valley |
085 |
358 |
0.14 |
0.0369 |
0 |
|
12 |
South Central LA County |
084 |
357 |
0.16 |
0.0393 |
0 |
|
12 |
South Central LA County |
801 |
-- |
-- |
-- |
-- |
|
13 |
Santa Clarita Valley |
089 |
-- |
-- |
-- |
-- |
|
Orange County |
||||||
|
16 |
North Orange County |
3177 |
361 |
0.13 |
0.0344 |
0 |
|
17 |
Central Orange County |
3176 |
362 |
0.13 |
0.0336 |
0 |
|
18 |
North Coastal Orange County |
3195 |
365 |
0.12 |
0.0200 |
0 |
|
19 |
Saddleback Valley |
3186 |
-- |
-- |
-- |
-- |
|
Riverside County |
||||||
|
22 |
Norco/Corona |
4155 |
-- |
-- |
-- |
-- |
|
23 |
Metropolitan Riverside County 1 |
4144 |
321 |
0.10 |
0.0225 |
0 |
|
23 |
Metropolitan Riverside County 2 |
4146 |
-- |
-- |
-- |
-- |
|
24 |
Perris Valley |
4149 |
-- |
-- |
-- |
-- |
|
25 |
Lake Elsinore |
4158 |
358 |
0.09 |
0.0174 |
0 |
|
29 |
San Gorgonio Pass |
4150 |
-- |
-- |
-- |
-- |
|
29 |
Banning Airport |
5995 |
359 |
0.26 |
0.0215 |
1 |
|
30 |
Coachella Valley 1** |
4137 |
347 |
0.07 |
0.0170 |
0 |
|
30 |
Coachella Valley 2** |
4157 |
-- |
-- |
-- |
-- |
|
San Bernardino County |
||||||
|
32 |
Northwest San Bernardino Valley |
5175 |
349 |
0.14 |
0.0359 |
0 |
|
33 |
Southwest San Bernardino Valley |
5171 |
-- |
-- |
-- |
-- |
|
34 |
Central San Bernardino Valley 1 |
5197 |
365 |
0.15 |
0.0362 |
0 |
|
34 |
Central San Bernardino Valley 2 |
5203 |
355 |
0.11 |
0.0339 |
0 |
|
35 |
East San Bernardino Valley |
5204 |
-- |
-- |
-- |
-- |
|
37 |
Central San Bernardino Mountains |
5181 |
-- |
-- |
-- |
-- |
|
|
District Max |
|
|
0.26 |
0.0433 |
1 |
ppm - Parts Per Million parts of air, by volume
-- - Pollutant not monitored.
*Less than 12 full months of data. May not be representative.
**Salton Sea Air Basin.
|
|
||||||||||||
|
Source/Receptor Area |
Station No. |
No. Days of Data |
Max Conc. |
Max Conc. |
Average AAM |
|||||||
|
No. |
Location |
|||||||||||
|
Los Angeles County |
||||||||||||
|
1 |
Central LA |
087 |
364 |
0.14 |
0.010 |
0.0008 |
||||||
|
2 |
Northwest Coastal LA County |
091 |
-- |
-- |
-- |
-- |
||||||
|
3 |
Southwest Coastal LA County |
094 |
359 |
0.03 |
0.014 |
0.0039 |
||||||
|
4 |
South Coastal LA County |
072 |
363 |
0.08 |
0.013 |
0.0018 |
||||||
|
6 |
West San Fernando Valley |
074 |
-- |
-- |
-- |
-- |
||||||
|
7 |
East San Fernando Valley |
069 |
365 |
0.01 |
0.009 |
0.0002 |
||||||
|
8 |
West San Gabriel Valley |
088 |
-- |
-- |
-- |
-- |
||||||
|
9 |
East San Gabriel Valley 1 |
060 |
-- |
-- |
-- |
-- |
||||||
|
9 |
East San Gabriel Valley 2 |
591 |
-- |
-- |
-- |
-- |
||||||
|
10 |
Pomona/Walnut Valley 1 |
075 |
-- |
-- |
-- |
-- |
||||||
|
11 |
South San Gabriel Valley |
085 |
-- |
-- |
-- |
-- |
||||||
|
12 |
South Central LA County |
084 |
-- |
-- |
-- |
-- |
||||||
|
12 |
South Central LA County |
801 |
-- |
-- |
-- |
-- |
||||||
|
13 |
Santa Clarita Valley |
089 |
-- |
-- |
-- |
-- |
||||||
|
Orange County |
||||||||||||
|
16 |
North Orange County |
3177 |
-- |
-- |
-- |
-- |
||||||
|
17 |
Central Orange County |
3176 |
-- |
-- |
-- |
-- |
||||||
|
18 |
North Coastal Orange County |
3195 |
358 |
0.02 |
0.008 |
0.0004 |
||||||
|
19 |
Saddleback Valley |
3186 |
-- |
-- |
-- - |
-- - |
||||||
|
Riverside County |
||||||||||||
|
22 |
Norco/Corona |
4155 |
-- |
-- |
-- |
-- |
||||||
|
23 |
Metropolitan Riverside County 1 |
4144 |
361 |
0.03 |
0.010 |
0.0011 |
||||||
|
23 |
Metropolitan Riverside County 2 |
4146 |
-- |
-- |
-- |
-- |
||||||
|
24 |
Perris Valley |
4149 |
-- |
-- |
-- |
-- |
||||||
|
25 |
Lake Elsinore |
4158 |
-- |
-- |
-- |
-- |
||||||
|
29 |
San Gorgonio Pass |
4150 |
-- |
-- |
-- |
-- |
||||||
|
29 |
Banning Airport |
5995 |
-- |
-- |
-- |
-- |
||||||
|
30 |
Coachella Valley 1** |
4137 |
-- |
-- |
-- - |
-- |
||||||
|
30 |
Coachella Valley 2** |
4157 |
-- |
-- |
-- |
-- |
||||||
|
San Bernardino County |
||||||||||||
|
32 |
Northwest San Bernardino Valley |
5175 |
-- |
-- |
-- |
-- |
||||||
|
33 |
Southwest San Bernardino Valley |
5171 |
-- |
-- |
-- |
-- |
||||||
|
34 |
Central San Bernardino Valley 1 |
5197 |
294 |
0.02* |
0.010* |
0.0007* |
||||||
|
34 |
Central San Bernardino Valley 2 |
5203 |
-- |
-- |
-- |
-- |
||||||
|
35 |
East San Bernardino Valley |
5204 |
-- |
-- |
-- |
-- |
||||||
|
37 |
Central San Bernardino Mountains |
5181 |
-- |
-- |
-- |
-- |
||||||
|
|
District Max |
|
|
0.14 |
0.014 |
0.0039 |
||||||
ppm - Parts Per Million parts of air, by volume
-- - Pollutant not monitored.
*Less than 12 full months of data. May not be representative.
**Salton Sea Air Basin.
c) - The state standards are 1-hour average > 0.25 ppm and 24-hour average > 0.04 ppm. No location exceeded state standards.
d) - The federal standard is annual arithmetic mean SO2 greater than 80 µg/m3 (0.03 ppm).
No location exceeded this standard.
The other federal standards (3-hour average > 0.50 ppm, and 24-hour average > 0.14 ppm) were not exceeded either.
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