CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER D—WATER PROGRAMS (Parts 100–149) > PART 142—NATIONAL PRIMARY DRINKING WATER REGULATIONS IMPLEMENTATION > SUBPART C—Review of State-Issued Variances and Exemptions (§142.20 to §142.24) > 142.21—State consideration of a variance or exemption request.

142.21—State consideration of a variance or exemption request.

A State with primary enforcement responsibility shall act on any variance or exemption request submitted to it, within 90 days of receipt of the request.