1-Hour Ozone (1979) Section 185A Nonattainment Areas - NAAQS Revoked
As of June 15, 2005
|Areas Listed Alphabetically||Design
|Imperial Co, CA||0.110||0.0||1||142||9||CA||no|
|Yuba City, CA||0.120||1.0||2||114||9||CA||msa|
|3 Total Areas||4||459|
"Section 185A" was previously called "Transitional". Prior designation retained by operation of law in 1991 but without measured violation based on 1987-89 data. Totals were adjusted to account for multiple areas in a single county. The former 1-Hour Ozone designations and classifications as of June 15, 2004, are being retained in subpart C of Part 81 for purposes of the anti backsliding provisions of 40 CFR 51.905. 40 CFR 51.905(c) references subpart C of part 81 for the areas affected by the anti-backsliding regulation.