Drinking Water Health Advisories

Drinking Water Health Advisories

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Jacksonville       Duval County                 904-346-1266
St Augustine      St Johns County             904-824-7144
Orange Park       Clay County                   904-264-6444
Jacksonville Beaches    Duval County      904-246-3969
Fernandina          Nassau County               904-277-3040
Macclenny          Baker County                 904-259-5091
Palm Coast         Flagler County                386-439-5290
Daytona              Volusia County               386-253-4911

GAINESVILLE    ALACHUA COUNTY       352-335-8555
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Criteria: Brominated Trihalomethanes

Brominated trihalomethanes are volatile organic liquids that have a number of industrial and chemical uses. The process of disinfecting drinking water generates brominated trihalomethanes as a by-product. The brominated trihalomethanes occurring in water are bromoform, dibromochloromethane, and bromodichloromethane. These compounds are formed when hypochlorous acid oxidizes bromide ion present in water to form hypobromous acid, which subsequently reacts with organic material to form the brominated trihalomethanes.

The Safe Drinking Water Act requires EPA to publish Maximum Contaminant Level Goals (MCLGs) and promulgate National Primary Drinking Water Regulations for each contaminant, which, in the judgment of the Administrator, may have an adverse effect on public health and which is known or anticipated to occur in public water systems. The MCLG is nonenforceable and is set at a level at which no known or anticipated adverse health effects in humans occur and which allows for an adequate margin of safety. Factors considered in setting the MCLG include health effects data and sources of exposure other than drinking water.

This document provides the health effects basis to be considered in establishing the MCLGs for brominated trihalomethanes found in chlorinated drinking water. To achieve this objective, data on pharmacokinetics, human exposure, acute and chronic toxicity to animals and humans, epidemiology and mechanisms of toxicity were evaluated. Specific emphasis is placed on literature data providing dose-response information. Thus, while the literature search and evaluation performed in support of this document was comprehensive, only the reports considered most pertinent in the derivation of the MCLGs are cited in this document. The comprehensive literature search in support of this document includes information published up to January, 2005; however, more recent information may have been added during the review process.

When adequate health effects data exist, health advisory values for less than lifetime exposure (One-day, Ten-day and Longer-term, approximately 10% of an individual’s lifetime) are included in this document. These values are not used in setting the MCLGs, but serve as informal guidance to municipalities and other organizations when emergency spills or contamination situations occur.

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Water Quality Standards are the foundation of the water quality-based pollution control program mandated by the Clean Water Act. Water Quality Standards define the goals for a waterbody by designating its uses, setting criteria to protect those uses, and establishing provisions to protect waterbodies from pollutants.

Drinking Water Standards are found elsewhere on our Web site.

Where You Live
Regional and state specific information.

Basic Information
The importance of Water Quality Standards and how they fit into overall water quality protection.

Laws & Regulations
Collection of legislative and federal requirements.

Policy & Guidance
Library of documents, notices, and memoranda designed to help states, tribes, & territories comply with federal regulations addressing water quality standards.

State, Tribal & Territorial Standards
A repository of the current standards for all waters of the U.S.

other websites we recommend you look at

www.asap-plumbing.com

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Training, Meetings & Outreach Materials
We offer courses, conduct public meetings, and provide resources to help you understand the basics and new developments.

Partnership with Tribes
See how to establish standards for federally recognized tribes.

Regional Coordinators
Points of contact for specific states and regions.