Record Display for the EPA National Library Catalog


OLS Field Name OLS Field Data
Main Title The impact of inorganic phosphates in the environment : final report /
Author Welch, Justine.
CORP Author United States. Environmental Protection Agency. Office of Toxic Substances.; Environmental Protection Agency, Washington, DC. Office of Toxic Substances.
Publisher Environmental Protection Agency, Office of Toxic Substances,
Year Published 1978
Report Number EPA/560/1-78/003
Stock Number PB-291 332
OCLC Number 04648184
Subjects Phosphorus. ; Eutrophication.
Additional Subjects Phosphates--Environmental aspects ; Eutrophication ; Phosphorus ; Environmental impacts ; Water pollution ; Reviews ; Aquatic plants ; Dissolved gases ; Oxygen ; Concentration(Composition) ; Fishes ; Algae ; Mortality ; Humans ; Sewage treatment ; Recreation ; Esthetics ; Cost analysis ; Estuaries ; Inorganic phosphates ; Economic impact ; Air pollution effects(Animals) ; Commercial fishing ; Sport fishing ; Trophic level ; Organic loading
Internet Access
Description Access URL
Library Call Number Additional Info Location Last
EJBD ARCHIVE EPA-560-1-78-003 Headquarters Library/Washington,DC 07/06/2016
EJED  EPA 560/1-78-003 OCSPP Chemical Library/Washington,DC 01/01/1988
NTIS  PB-291 332 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. 01/01/1988
Collation v, 89 pages : illustrations ; 28 cm
This report reviews the literature concerning the consequences of nutrient enrichment, the significance of phosphorus in eutrophication, critical phosphorus concentrations, the effects of eutrophication on human populations, and the extent of the eutrophication problem in the United States. The evidence contained in this report indicates that (a) excessive nutrient concentrations are associated with undesirable changes (eutrophication) in aquatic plants, depletion of dissolved oxygen, disappearance of cold water fish, and appearance of nuisance algal species; (b) excessive phosphorus is most frequently responsible for these undesirable changes in lakes; (c) lakes and reservoirs respond more severely to excessive phosphorus concentrations than do flowing waters, and do so at lower phosphorus concentrations; (d) phosphorus may at times be the limiting factor in estuaries but is not usually the limiting factor in coastal waters; (e) critical phosphorus levels which lead to eutrophication have not been clearly defined because of the variation in the response of surface waters to phosphorus caused by differences in residence times, (f) eutrophication has adversely affected human populations through increased water treatment costs, decreased property values, changes in the commercial fishery and reduction of the aesthetic and recreational values of affected lakes.
Issued Nov. 1978. Includes bibliographical references (pages 78-87).