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The Effect of Ozonation in Reducing Trihalomethane Formation Potential

Description: Trihalomethanes such as chloroform, dichlorobromomethane, dibromochloromethane, and bromoform are formed when natural water is chlorinated in water treatment. This investigation explores the use of ozone to remove organic precursors from natural water, thus decreasing trihalomethane formation potential. The data suggest a mechanism involving formation of secondary precursors after prolonged contact with ozone, suggesting that trihalomethane precursors may be minimized by using low doses of ozone and short contact time.
Date: May 1981
Creator: Lin, Simon H.
Partner: UNT Libraries

Safe Drinking Water Act (SDWA): A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. The SDWA, Title XIV of the Public Health Service Act, is the key federal law for protecting public water supplies from harmful contaminants. First enacted in 1974 and substantially amended in 1986 and 1996, the act is administered through programs that establish standards and treatment requirements for public water supplies, control underground injection of wastes, finance infrastructure projects, and protect sources of drinking water.
Date: December 10, 2010
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. It excerpts, with several additions, the SDWA chapter of CRS Report RL30798, Environmental Laws: Summaries of Major Statues Administered by the Environmental Protection Agency (EPA), which provides summaries of the principal environmental statutes administered by the Environmental Protection Agency (EPA). This report includes the drinking water security provisions added to the SDWA by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (P.L. 107-188).
Date: May 21, 2008
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

Controversies over Redefining “Fill Material” Under the Clean Water Act

Description: This report discusses the Clean Water Act that contains two different permitting regimes: (1) Section 402 permits (called the National Pollutant Discharge Elimination System, or NPDES, permit program) address the discharge of most pollutants, and (2) Section 404 permits address the discharge of dredged or fill material into navigable waters of the United States at specified sites. These permit programs differ in nature and approach.
Date: April 20, 2009
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Microorganisms Associated with a Spray Irrigation System

Description: The area of research for this thesis concerns the role played by microorganisms in the process of organic breakdown of waste effluent. Although considerable research has been done since the early 1950's, little consideration has been given to the role of the microorganisms in this type of waste water purification.
Date: August 1969
Creator: Nichols, Susan
Partner: UNT Libraries

Safe Drinking Water Act (SDWA): A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. This report includes the drinking water security provisions added to the SDWA by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (P.L. 107-188), and lead reduction provisions as amended by P.L. 111-380. It also outlines amendments made in December 2013 by P.L. 113-64 (H.R. 3588) to explicitly exempt fire hydrants from coverage under the act's lead plumbing restrictions.
Date: February 5, 2014
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act: A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. It excerpts, with several additions, the SDWA chapter of CRS Report RL30798, Environmental Laws: Summaries of Major Statues Administered by the Environmental Protection Agency (EPA), which provides summaries of the principal environmental statutes administered by the Environmental Protection Agency (EPA). This report includes the drinking water security provisions added to the SDWA by the Public Heath Security and Bioterrorism Preparedness and Response Act of 2002.
Date: May 21, 2008
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

Safe Drinking Water Act (SDWA): A Summary of the Act and Its Major Requirements

Description: This report summarizes the Safe Drinking Water Act (SDWA) and its major programs and regulatory requirements. It includes the drinking water security provisions added to the SDWA by the Public Health Security and Bioterrorism Preparedness and Response Act of 2002 (P.L. 107-188), and lead reduction provisions as amended by P.L. 111-380. It also outlines amendments made in December 2013 by P.L. 113-64 (H.R. 3588) to explicitly exempt fire hydrants from coverage under the act's lead plumbing restrictions.
Date: March 1, 2017
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

The Photolytic Ozonation of Organics in Aqueous Solutions

Description: The aim of the investigation described in this work is to gain a better understanding of the processes involved in the oxidation of organic compounds by photolytic ozonation in a laboratory scale reactor. The results and discussions are presented in Chapter III. This chapter contains four parts. In the first part, mass transfer efficiency and the calculation of the mass transfer coefficient, KLa, as well as the ozone decomposition rate constant, KD, are presented and compared with those obtained by other investigators. The second part deals with the kinetics of the photolysis of 2,2',4,4',6,6'-hexachlorobiphenyl both in purified and natural lake water. Mathematical expressions and a discussion of the possible reaction processes involved are given. Kinetic models of ozonation and photolytic ozonation in purified and natural lake water are developed and discussed in part three. Rate constants are calculated from experimental data and used to predict values of substrate destruction with a mathematical model. The fourth part of this chapter deals with the identification of products from the photolysis, ozonation and photolytic ozonation of 2,2'4,4',6,6'-hexachlorobiphenyl. The products are isolated and identified using combined gas chromatography and mass spectroscopy, and reaction mechanisms are suggested.
Date: May 1980
Creator: Huang, Francis Y.
Partner: UNT Libraries

Drinking Water State Revolving Fund (DWSRF): Program Overview and Issues

Description: This report discusses the Safe Drinking Water Act (SDWA) Amendments of 1996, which authorized a drinking water state revolving loan fund (DWSRF) program. It includes an overview of funding, allotments and set-asides, drinking water infrastructure needs, program issues, and legislative activity.
Date: February 6, 2015
Creator: Tiemann, Mary
Partner: UNT Libraries Government Documents Department

An Investigation of Naturally Occurring Tastes and Odors from Fresh Waters

Description: The Problem of the cause and control of tastes and odors in water supplies has been the subject of a great many investigations during the last half-century; however, many questions in this field remain to be answered. Theories relating to the cause of tastes and odors occurring in water are still rather numerous and, at present, only a few of them are compatible. Although several procedures have been employed for the eradication of tastes and odors from water supplies, none of them are completely successful.
Date: May 1955
Creator: Pipes, Wesley O'Feral, Jr.
Partner: UNT Libraries

Controversies over Redefining "Fill Material" Under the Clean Water Act

Description: On May 3, 2002, the Environmental Protection Agency (EPA) and the U.S. Army Corps of Engineers (the Corps) announced a regulation redefining two key terms, "fill material" and "discharge of fill material," in rules that implement Section 404 of the Clean Water Act. This report discusses the 2002 rule, focusing on how it changes which material and types of activities are regulated under Section 404 and the significance of these issues, especially for the mining industry.
Date: April 20, 2009
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Desalination: Status and Federal Issues

Description: This report discusses desalination in the context of federal policy. Interest in desalination of seawater, brackish water, and contaminated freshwater has increased in the United States as the technology's costs have fallen and pressure to develop new water supplies has grown. Adoption of desalination, however, remains constrained by financial, environmental, and regulatory and social factors.
Date: December 30, 2009
Creator: Carter, Nicole T.
Partner: UNT Libraries Government Documents Department

Clean Water Act: A Summary of the Law

Description: This report presents a summary of the law, describing the essence of the statute without discussing its implementation. Other CRS products do discuss implementation, including CRS Report RL33800, Water Quality Issues in the 110th Congress: Oversight and Implementation, and numerous products cited in that report.
Date: March 17, 2008
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department

Clean Water Act Section 401: Background and Issues

Description: Report discussing specifics of the U.S. Clean Water Act. Section 401 of the Clean Water Act requires that an applicant for a federal license or permit provide a certification that any discharges from the facility will comply with the act, including water quality standard requirements. Disputes have arisen over the states' exercise of authority under Section 401. For the most part, the debate over the Section 401 certification issue has been between states and hydropower interests.
Date: March 20, 2008
Creator: Copeland, Claudia
Partner: UNT Libraries Government Documents Department