pollutant                   type                      standard    averaging time       regulatory citation
0       so 2                primary      0.14 ppm (365 μg / m 3 )         24 - hour           40 cfr 50.4 (b)
1       so 2                primary   0.030 ppm (80 μg / m cubic)            annual           40 cfr 50.4 (a)
2       so 2              secondary   0.5 ppm (1300 μg / m cubic)          3 - hour           40 cfr 50.5 (a)
3      pm 10  primary and secondary              150 μg / m cubic         24 - hour           40 cfr 50.6 (a)
4     pm 2.5              secondary               35 μg / m cubic         24 - hour           40 cfr 50.7 (a)
5     pm 2.5                primary               15 μg / m cubic            annual           40 cfr 50.7 (a)
6         co                primary      35 ppm (40 mg / m cubic)          1 - hour       40 cfr 50.8 (a) (2)
7         co                primary       9 ppm (10 mg / m cubic)          8 - hour       40 cfr 50.8 (a) (1)
8        o 3  primary and secondary   0.12 ppm (235 μg / m cubic)          1 - hour           40 cfr 50.9 (a)
9        o 3  primary and secondary  0.075 ppm (150 μg / m cubic)          8 - hour          40 cfr 50.10 (a)
10      no 2  primary and secondary  0.053 ppm (100 μg / m cubic)            annual  40 cfr 50.11 (a) and (b)
11        pb  primary and secondary             0.15 μg / m cubic  rolling 3 months              40 cfr 50.12

Table as JSON:
{"pollutant":{"0":"so 2","1":"so 2","2":"so 2","3":"pm 10","4":"pm 2.5","5":"pm 2.5","6":"co","7":"co","8":"o 3","9":"o 3","10":"no 2","11":"pb"},"type":{"0":"primary","1":"primary","2":"secondary","3":"primary and secondary","4":"secondary","5":"primary","6":"primary","7":"primary","8":"primary and secondary","9":"primary and secondary","10":"primary and secondary","11":"primary and secondary"},"standard":{"0":"0.14 ppm (365 μg \/ m 3 )","1":"0.030 ppm (80 μg \/ m cubic)","2":"0.5 ppm (1300 μg \/ m cubic)","3":"150 μg \/ m cubic","4":"35 μg \/ m cubic","5":"15 μg \/ m cubic","6":"35 ppm (40 mg \/ m cubic)","7":"9 ppm (10 mg \/ m cubic)","8":"0.12 ppm (235 μg \/ m cubic)","9":"0.075 ppm (150 μg \/ m cubic)","10":"0.053 ppm (100 μg \/ m cubic)","11":"0.15 μg \/ m cubic"},"averaging time":{"0":"24 - hour","1":"annual","2":"3 - hour","3":"24 - hour","4":"24 - hour","5":"annual","6":"1 - hour","7":"8 - hour","8":"1 - hour","9":"8 - hour","10":"annual","11":"rolling 3 months"},"regulatory citation":{"0":"40 cfr 50.4 (b)","1":"40 cfr 50.4 (a)","2":"40 cfr 50.5 (a)","3":"40 cfr 50.6 (a)","4":"40 cfr 50.7 (a)","5":"40 cfr 50.7 (a)","6":"40 cfr 50.8 (a) (2)","7":"40 cfr 50.8 (a) (1)","8":"40 cfr 50.9 (a)","9":"40 cfr 50.10 (a)","10":"40 cfr 50.11 (a) and (b)","11":"40 cfr 50.12"}}