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RECORD NUMBER: 1 OF 3

Main Title Assessment of Water Quality Concentrations and Loads from Natural Landscapes.
Author E. D. STEIN; V. K. Yoon
CORP Author Southern California Coastal Water Research Project, El Segundo.; Environmental Protection Agency, San Francisco, CA. Region IX.
Year Published 2007
Report Number TR-500
Stock Number PB2009-102210
Subjects Water quality; California; Natural loads; Anthropogenic activities; Water pollution; Nutrients; Streams
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB2009-102210 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 04/28/2010
Collation 113p
Abstract More than 100 waterbodies in southern California have been designated as impaired for their beneficial uses under Section 303(d) of the Clean Water Act for a range of constituents. Despite the number of impaired waterbodies, currently there is no basis for differentiating water quality problems from natural variability. Without knowing the range of natural background levels, it is difficult to discern whether high levels of naturally occurring constituents indicate a pollution problem. Furthermore, lack of information on background concentrations, load, and flux complicates determination of appropriate management targets when remediating impaired waterbodies. To fully evaluate the effect of anthropogenic activities, it is important to describe water quality in streams draining natural environments and to understand the factors that control these natural loadings. The overall goal of this study is to evaluate the water quality contributions and properties of stream reaches in natural catchments throughout southern California.
Supplementary Notes Appendices are not included in this document. Sponsored by Environmental Protection Agency, San Francisco, CA. Region IX.
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PUB Date Free Form Feb 2007
Category Codes 68D; 48G; 48B; 43F
NTIS Prices PC A07/MF A07
Document Type NT
Control Number 010500660
Cataloging Source NTIS/MT
Origin NTIS
Type CAT