Water

OEHHA performs major risk assessment and hazard evaluation activities relating to chemical contaminants in drinking water. These activities include developing health advisories, Public Health Goals for chemical substances in drinking water, Notification Levels, and providing toxicological assistance for chemical monitoring activities for the drinking water supply. The program also provides education to the public and other governmental agencies on drinking water contamination and drinking water regulatory standards development.

Public Health Goals

Level of a chemical contaminant in drinking water that does not pose a significant risk to health

Notices

Legal notices for Public Health Goals and Notification Levels

Notification Levels

Health-based advisory levels for chemicals in drinking water

Reports

Reports focusing on water

Human Right to Water

OEHHA’s assessment framework and data tool related to drinking water quality, accessibility, and affordability

Upcoming Events

A draft document for public review describing proposed Public Health Goals (PHGs) for the five regulated haloacetic acids (HAAs) found in drinking water as a result of disinfection methods: monochloroacetic acid (MCA), dichloroacetic acid (DCA), trichloroacetic acid (TCA), monobromoacetic acid (MBA), and dibromoacetic acid (DBA). Extension of comment period and announcement of Draft Agenda.

Fri, 01/31/2020 to Fri, 05/01/2020

Reports, Notices, Documents

Mar 5, 2020: Extension of Public Comment Period for Proposed Public Health Goals for Haloacetic Acids in Drinking Water and Announcement of Availability of the Public Workshop Agenda
A draft document for public review describing proposed Public Health Goals (PHGs) for the five regulated haloacetic acids (HAAs) found in drinking water as a result of disinfection methods: monochloroacetic acid (MCA), dichloroacetic acid (DCA), trichloroacetic acid (TCA), monobromoacetic acid (MBA), and dibromoacetic acid (DBA). Extension of comment period and announcement of Draft Agenda.
Feb 7, 2020: Announcement of Publication of Public Health Goals and Technical Support Document for Trihalomethanes In Drinking Water
The Office of Environmental Health Hazard Assessment (OEHHA) of the California Environmental Protection Agency is announcing the publication of Public Health Goals (PHGs) for four trihalomethanes (THMs) found in drinking water as a result of disinfection methods: chloroform, bromodichloromethane (BDCM), dibromochloromethane (DBCM), and bromoform.  A PHG is the level of a drinking water contaminant at which adverse health effects are not expected to occur from a lifetime of exposure.
Dec 23, 2019: Perfluorooctanoic Acid (PFOA) and Perfluorooctane Sulfonate (PFOS) in Drinking Water
PUBLIC HEALTH GOAL INITIATION WEBINAR: The Office of Environmental Health Hazard Assessment (OEHHA) is hosting a webinar on November 15, 2019, from 9:00 a.m. to 12:00 p.m. (PST), to provide the public with the opportunity to hear and ask questions about the toxicological and epidemiological data for evaluating the health risks of perfluorooctanoic acid (PFOA) and perfluorooctane sulfonate (PFOS) in drinking water. PUBLIC HEALTH GOAL INITIATION NOTICE AND DATA CALL-IN: At the request of the State Water Resources Control Board (SWRCB), OEHHA is initiation the development of public health goals (PHGs) for PFOA and PFOS in drinking water. 
Nov 8, 2019: Announcement of Availability of a Second Public Review Draft Technical Support Document for Proposed Public Health Goals for Trihalomethanes in Drinking Water
 A Public Health Goal (PHG) is the level of a drinking water contaminant at which adverse health effects are not expected to occur from a lifetime of exposure. The technical support document presents the scientific information available on the toxicity for four trihalomethanes (THMs) and the calculation of the proposed PHGs.

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