Record Display for the EPA National Library Catalog


Main Title Physicochemical Factors Affecting Toxicity in Freshwater: Hardness, pH, and Temperature (Chapter 1).
Author Mayer, F. L. ; Marking, L. L. ; Bills, T. D. ; Howe, G. E. ;
CORP Author Environmental Research Lab., Gulf Breeze, FL. ;National Fisheries Research Center, La Crosse, WI.
Publisher c1994
Year Published 1994
Report Number EPA/600/A-94/199;
Stock Number PB95-122990
Additional Subjects Freshwater biology ; Toxicity ; Water pollution effects(Animals) ; Water chemistry ; Physicochemical properties ; Contaminants ; Aquatic animals ; pH ; Temperature ; Hardness(Water) ; Acute exposure ; Chronic exposure ; Biological effects ; Reprints ; Bioavailability
Library Call Number Additional Info Location Last
NTIS  PB95-122990 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 26p
A search of the literature for effects of hardness, pH, or temperature on the toxicity of chemicals to freshwater organisms suggested that the amount of reliable and useful data is limited. Much of the disparity among results reported in the literature was caused by improperly designed tests. Thus, effects of modifying factors on toxicity should be interpreted within experiments and not between them. Hardness does not appear to affect the toxicity of organic chemicals, but metals are generally more toxic in waters of low hardness. Of the chemical characteristics of water, pH caused the greatest change in toxicity. Physicochemical ractors do not appear to affect toxicity per se, but do affect bioavailability and exposure.