{"data":{"id":"us/40-cfr-141.628","jurisdiction":"us","citation":"40 CFR 141.628","heading":"Requirements for remaining on increased TTHM and HAA5 monitoring based on subpart L results.","body":"If you were on increased monitoring under § 141.132(b)(1), you must remain on increased monitoring until you qualify for a return to routine monitoring under § 141.625(c). You must conduct increased monitoring under § 141.625 at the monitoring locations in the monitoring plan developed under § 141.622 beginning at the date identified in § 141.620(c) for compliance with this subpart and remain on increased monitoring until you qualify for a return to routine monitoring under § 141.625(c).","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 141—NATIONAL PRIMARY DRINKING WATER REGULATIONS","Subpart V—Stage 2 Disinfection Byproducts Requirements"],"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":"d7810ff3fe45393dd0eb70a7d3f356700684a75c45337705ab97b0697d0788ce","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-141.627","next":"us/40-cfr-141.629"},"notice":"GroundRules: Original legal text. Not legal advice."}