{"data":{"id":"us/40-cfr-141.530","jurisdiction":"us","citation":"40 CFR 141.530","heading":"What is a disinfection profile and who must develop one?","body":"A disinfection profile is a graphical representation of your system's level of Giardia lamblia or virus inactivation measured during the course of a year. If you are a subpart H community or non-transient non-community water system which serves fewer than 10,000 persons, your system must develop a disinfection profile unless your State determines that your system's profile is unnecessary. Your State may approve the use of a more representative data set for disinfection profiling than the data set required under §§ 141.532-141.536.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER D—WATER PROGRAMS","PART 141—NATIONAL PRIMARY DRINKING WATER REGULATIONS","Subpart T—Enhanced Filtration and Disinfection—Systems Serving Fewer Than 10,000 People"],"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":"e9ed0c2959a3d8caffbce0eb82495a4a42a91a430951c33c29f0184db5476a1c","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-141.522","next":"us/40-cfr-141.531"},"notice":"GroundRules: Original legal text. Not legal advice."}