40 CFR § 52.2331
Attainment dates for national standards
June 9, 2020
The attainment date for the secondary NAAQS for sulfur dioxide for Salt Lake County and portions of Tooele County is December 31, 1994.
[61 FR 16062, Apr. 11, 1996]
The attainment date for the secondary NAAQS for sulfur dioxide for Salt Lake County and portions of Tooele County is December 31, 1994.
[61 FR 16062, Apr. 11, 1996]