{"data":{"id":"us/40-cfr-131.13","jurisdiction":"us","citation":"40 CFR 131.13","heading":"General policies.","body":"States may, at their discretion, include in their State standards, policies generally affecting their application and implementation, such as mixing zones, low flows and variances. Such policies are subject to EPA review and approval.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 131—WATER QUALITY STANDARDS","Subpart B—Establishment of Water Quality Standards"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"4cb5293f5b0195712827d48c2eaa6070faa3d8070a64221cbfe5559adb56b4af","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-131.12","next":"us/40-cfr-131.14"},"notice":"GroundRules: Original legal text. Not legal advice."}