Search Results
Use the filters on the left-hand side of this screen to refine the results further by topic or document type.
89 FR 26620
EPA proposed to revise the existing secondary sulfur dioxide NAAQS, to retain the existing secondary standards for nitrogen oxides and particulate matter, and to revise the data handling requirements for the proposed secondary sulfur oxide NAAQS.
89 FR 26115
SIP Proposal: Ohio (particulate matter rules).
Grand Portage Band of Lake Superior Chippewa v. United States Environmental Protection Agency
A district court denied summary judgment for Native American tribes in a challenge to EPA's approval of Minnesota's 2021 revised water quality standards. The revisions replaced quantitative standards with qualitative narrative standards that describe the characteristics Minnesota waters must have to...