Federal Register, Volume 65, No. 69, Monday, April 10, 2000 Proposed Rules. Part2. 40 CFR Parts 141 and 142. National Primary Drinking Water Regulations: Long Term 1 Enhanced Surface Water Treatment and Filter Backwash Rule; Proposed Rule

摘要

In this document, EPA is proposing the Long Term 1 Enhanced Surface WaterTreatment and Filter Backwash Rule (LT1FBR). The purposes of the LT1FBR are to: Improve control of microbial pathogens in drinking water, including Cryptosporidium, for public water systems (PWSs) serving fewer than 10,000 people; prevent increases in microbial risk while PWSs serving fewer than 10,000 people control for disinfection byproducts; and require certain PWSs to institute changes to the return of recycle flows within the treatment process to reduce the effects of recyle on compromising microbial control.