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RoC Review of Haloacetic Acids Found as Water Disinfection By-Products

Glass of water with chemical formulas composited on top

Substance Overview

Listing Status: Topic selected for evaluation

Primary Uses or Exposures

  • Derivatives of acetic acid with one or more halogen atoms (i.e., chlorine or bromine) attached that are formed during chlorination of water containing organic molecules.
  • People are mainly exposed to HAA from ingestion of chlorinated drinking water; they may also be exposed to HAAs from bathing or the use of swimming pools and spas that use chlorine for disinfection.
  • More than 250 million people receive disinfected water, with 98% of water treatment systems using some type of chlorine disinfection process. Water disinfection is among the most important and beneficial public health advances of the 20th century in the United States and worldwide.

Documents

Documents for Haloacetic Acids
Date Document
Oct 07, 2015 Federal Register notice requesting public comment on nominated substances (PDF HTML)
Mar 01, 2016 Concept Document
Mar 23, 2017 RoC Protocol
Jun 06, 2017 Draft RoC Monograph
Oct 30, 2017 Revised RoC Monograph
Mar 30, 2018 Final RoC Monograph

Meetings & Events

Listing of related events
Date Event Event Type Materials
Apr 11, 2016

NTP Board of Scientific Counselors Meeting

Board of Scientific Counselors
Jul 24, 2017

Peer Review of the Draft RoC Monograph on Haloacetic Acids Found as Water Disinfection By-Products

Peer Review Panels - RoC Monographs
Dec 07, 2017

NTP Board of Scientific Counselors Meeting

Board of Scientific Counselors
Supplemental materials for events, meetings, and workshops prior to 2015 have been archived. These archived materials frequently include presentations, background materials, and public comments. Request a list or copy of archived materials for the following meetings by e-mailing email us or use our contact form.

Public Comments

List of Public Comments for the Report on Carcinogens
Date Received Commenter(s) Affiliation In Response To
Apr 04, 2016 Judith Nordgren Chlorine Chemistry Division/American Chemistry Council Mar 14, 2016 Federal Register notice
Jul 11, 2017 Tasha Stoiber, Ph.D. Environmental Working Group Jun 23, 2017 Federal Register notice
Jul 14, 2017 Judith Nordgren Chlorine Chemistry Division/American Chemistry Council Jun 23, 2017 Federal Register notice
Nov 29, 2017 Judith Nordgren Chlorine Chemistry Division/American Chemistry Council Nov 09, 2017 Federal Register notice

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