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Water Quality: EPA Faces Challenges in Addressing Damage Caused by Airborne Pollutants

Description: A letter report issued by the Government Accountability Office with an abstract that begins "Atmospheric deposition of nitrogen oxides (NOx), sulfur dioxide (SO2), and mercury contributes to the impairment of the nation's waters, but the full extent is not known. For example, states provide EPA with data on the extent to which their waterbodies do not meet water quality standards, and some states have reported that some of their waterbodies are polluted because of atmospheric deposition. Howeve… more
Date: January 24, 2013
Creator: United States. Government Accountability Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Quality: Identification and Remediation of Polluted Waters Impeded by Data Gaps

Description: Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the adequacy of the data that the Environmental Protection Agency and the states have for making critical water quality decisions required by the Clean Water Act, focusing on: (1) the adequacy of the data for identifying waters for states' 303(d) lists; (2) the adequacy of data for developing total maximum daily loads (TMDL) for those waters; and (3) key factors tha… more
Date: February 10, 2000
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
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Water Quality: Identification and Remediation of Polluted Waters Impeded by Data Gaps

Description: Testimony issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO discussed the data that the Environmental Protection Agency (EPA) and the states have for making critical water quality decisions required by the Clean Water Act, focusing on: (1) the adequacy of the data for identifying waters for states' 303(d) lists; (2) the adequacy of data for developing total maximum daily loads (TMDL) for those waters; and (3) key factors that affect t… more
Date: March 23, 2000
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

The State of the Hudson 2009

Description: This report describes the environmental quality of the Hudson River and its watershed, including issues such as pollution, population growth, and biodiversity. The report also describes the habitats of estuaries, watersheds, and rivers in general.
Date: 2009
Creator: New York (State). Hudson River Estuary Program.
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Evaluation of Adsorption and Microcoulometric Methods for Determination of Halogenated Organic Compounds in Water

Description: Two adsorption/microcoulometric methods have been investigated for total organic halogen (TOX) in water. TOX, a proposed water-quality parameter, is a rapid, surrogate method to detect halides microcoulometrically and does not require compound identification before water quality can be judged. An XAD resin is used to concentrate organic halides that are eluted by a two-step, two-solvent procedure, followed by analysis using :chromatography or pyrolysis to convert organic halides to halide. In t… more
Date: May 1980
Creator: Kinstley, Warren O. (Warren Owen)
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Ephippia Production, Activation, and Use of Ex-Ephippio Neonates of Ceriodaphnia Dubia as Toxicity Test Organisms

Description: Ceriodaphnia dubia is widely used as a test organism in monitoring water quality. At the present time, cultures must be continuously maintained in the laboratory. In an attempt to avoid continuous culture and maintenance, the hatching of ephippial eggs of C. dubia would provide test organisms when needed. In order to determine the parameters required for maximum hatching, approximately ninety-four thousand ephippia were exposed to a variety of conditions ranging from light and temperature regim… more
Date: August 1992
Creator: Poage, Duane W.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Predicting the Site-Specific Bioavailability of Zinc Using the Indicator Species Procedure: A Case Study

Description: National Water Quality Criteria intended to protect aquatic life and their uses from the adverse effects of pollutants may not be appropriate due to site-specific factors that alter chemical bioavailability. The Indicator Species Procedure may be used to derive site-specific criteria in order to account for differences in site-specific bioavailability. This procedure was implemented using zinc for three chemically different site (river) waters. The purpose of this study was to quantify the bioa… more
Date: May 1987
Creator: Parkerton, Thomas F.
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Water Quality: Inconsistent State Approaches Complicate Nation's Efforts to Identify Its Most Polluted Waters

Description: A letter report issued by the General Accounting Office with an abstract that begins "The Environmental Protection Agency (EPA) believes that more than 20,000 bodies of water throughout the country are too polluted to meet water quality standards. States use different approaches to identify impaired waters. This variation has led not only to inconsistencies in the listing of impaired waters but also to difficulties in identifying the total number of impaired waters nationwide and the total numb… more
Date: January 11, 2002
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

The Impacts and Costs of Climate Change

Description: The effects of global climate change from greenhouse gas emissions (GHGs) are diverse and potentially very large, and probably constitute the most serious long-term environmental issue currently facing the world. This paper is prepared as task 1 of the project 'Modelling support for Future Actions - Benefits and Cost of Climate Change Policies and Measures', ENV.C.2/2004/0088, led by K.U.Leuven, Katholieke Universiteit Leuven. The paper provides a rapid review and analysis of the impacts and ec… more
Date: September 2005
Creator: Watkiss, Paul; Downing, Tom; Handley, Claire & Butterfield, Ruth
Item Type: Refine your search to only Text
Partner: UNT Libraries
open access

Water Quality: Federal Role in Addressing and Contributing to Nonpoint Source Pollution

Description: A chapter report issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO provided information on the impacts of nonpoint source water pollution and the potential costs of dealing with the problem, focusing on: (1) funding levels for federal programs that primarily address nonpoint source pollution; (2) the way Environmental Protection Agency (EPA) assesses the overall potential costs of reducing nonpoint pollution nationwide and alternative… more
Date: February 26, 1999
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Aquatic Ecological Classification and Evaluation of Streams and Stream Reaches in the Upper Roanoke River Basin, Virginia

Description: The purpose of this study is to "establish a data base and methodology for classifying...the streams of the Roanoke Basin into a hierarchy of ecological systems" and to "establish evaluative criteria and methodology for classifying and ranking streams within the ecological systems relative to their state of environmental quality" (p. R1).
Date: March 30, 1979
Creator: North Texas State University. Institute of Applied Sciences.
Item Type: Refine your search to only Report
Partner: UNT Institute of Applied Sciences
open access

How Healthy is the Upper Trinity River?: Biological and Water Quality Perspectives

Description: This conference report contains discussions and papers from a symposium hosted at Texas Christian University, in Fort Worth, Texas, examining the ecological health of the Upper Trinity River, and the impacts of various human activity, such as agriculture, urbanization, and waste management. The papers cover the effect of water quality on urban rivers, long-term water quality trends in the Trinity River, solutions that may improve water quality in the river, as well as biological, agricultural … more
Date: 1990
Creator: Jensen, Ric
Item Type: Refine your search to only Book
Partner: UNT Libraries
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Water Quality: Program Enhancements Would Better Ensure Adequacy of Boat Pumpout Facilities in No-Discharge Zones

Description: A letter report issued by the General Accounting Office with an abstract that begins "Clean Water Act regulations generally prohibit boats from discharging untreated sewage but allow the discharge of treated sewage using certified marine sanitation devices. The act allows states to designate "no-discharge zones"--areas in which vessels are prohibited from discharging any sewage--if the Environmental Protection Agency (EPA) finds that adequate facilities exist in such zones for the removal and t… more
Date: May 24, 2004
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Water Quality: Problems in the New River and Imperial County, California

Description: Correspondence issued by the General Accounting Office with an abstract that begins "Pursuant to a congressional request, GAO examined a number of issues concerning water quality problems in the New River and Imperial County in southern California, focusing on the: (1) types and the sources of pollutants entering the New River; (2) agencies and the organizations responsible for monitoring and regulating pollution in the New River; (3) risks to human health and the environment from water polluti… more
Date: August 5, 1999
Creator: United States. General Accounting Office.
Item Type: Refine your search to only Text
Partner: UNT Libraries Government Documents Department
open access

A Quantitative Chemical Examination of Surface Well Water from the Three Principal Geological Divisions of Denton County

Description: A sample of the surface-well water was taken from an area of the predominating soil of each of the three geological regions of Denton County, Texas, and a chemical analysis of each sample was made. This thesis deals with the area from which the samples were taken, the methods of analysis used, and the results of the analysis.
Date: August 1936
Creator: Schnably, John Robert
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
open access

Effects of Water Quality, Instream Toxicity, and Habitat Variability on Fish Assemblages in the Trinity River, Texas

Description: The Trinity River flows through the Dallas-Ft. Worth Metroplex in north central Texas where it receives effluents from numerous point sources including seven large regional wastewater treatment facilities. Historically, the Trinity River has been impacted by massive wastewater loadings which often constitute > 80% of the total river discharge during low flow periods. Normally, high mass loadings correspond to the summer months, compounding the effects of a naturally stressful period, characteri… more
Date: December 1989
Creator: Arnold, Winfred R., 1960-
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries
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Pre-Impoundment Estimations of Nutrient Loading to Ray Roberts Lake and Prediction of Post-Inundation Trophic Status

Description: Excessive nutrient loading of natural and artificial lakes has led, in some systems, to plethoric algal and aquatic macrophyte growth which can result in aesthetic degradation and undesirable tastes and odors. It would be advantageous to have some indication of the potential trophic status of a reservoir before it is filled. An objective of this study was to assess the water quality and nutrient loading potential of the tributaries entering Ray Roberts Lake, a large reservoir located in north c… more
Date: May 1988
Creator: Pillard, David Alan, 1958-
Item Type: Refine your search to only Thesis or Dissertation
Partner: UNT Libraries

Bringing real world applications for wireless sensor networks into the classroom: Telemetric monitoring of water quality in an artificial stream [2013: Poster]

Description: This poster discusses research on bringing real world applications for wireless sensor networks into the classroom in the context of telemetric monitoring of water quality in an artificial stream.
Date: 2013
Creator: Bunn, Zac; McEver, Mike; Seastrunk, Deliah; Fu, Shengli; Hoeinghaus, David & Gu, Yixing
Item Type: Refine your search to only Poster
Partner: UNT College of Engineering
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Clean Water Act: A Review of Issues in the 109th Congress

Description: Legislative initiatives to comprehensively amend the Clean Water Act had stalled for some time as interested parties debated whether and exactly how to change the law. Congress had instead focused legislative attention on narrow bills to extend or modify selected Clean Water Act programs, rather than taking up comprehensive proposals. This report contains information on the most recent developments on related issues as it its writing, background and analysis, and legislative issues with the 109… more
Date: December 15, 2006
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Clean Water Act Issues in the 109th Congress

Description: Legislative initiatives to comprehensively amend the Clean Water Act have talked for some time as interested parties have debated whether and exactly how to change the law. Congress has recently focused legislative attention on narrow bills to extend or modify selected Clean Water Act programs, rather than taking up comprehensive proposals. This report contains information on the recent developments as of its writing, background and analysis as related to the Clean Water Act legislative actions… more
Date: May 24, 2006
Creator: Copeland, Claudia
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hydrogeologic and Water-Quality Characteristics of the Ironton-Galesville Aquifer, Southeast Minnesota

Description: Introduction: The U.S. Geological Survey began a study in 1980 of the quality of water in the principal aquifers of Minnesota. The U.S. Environmental Protection Agency funded the study as part of the Underground Injection Control Program, which deals with disposal of liquid wastes beneath land surface. The initial report designated 14 aquifers in the State and provided general information about their geologic, hydrologic, and water-quality characteristics (Adolphson and others, 1981). This repo… more
Date: 1982
Creator: Ruhl, J. F.; Wolf, R. J. & Adolphson, D. G.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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