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Discovery of Cyanuric Acid During an Assessment of Natural Organic Matter in Stormflow Water of the Santa Ana River, Southern California, 2003-2004

Scientific Investigations Report 2007-5048

Prepared in cooperation with the Orange County Water District, Fountain Valley, California
By:
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Abstract

A stormflow study of natural organic matter and organic contaminants in the Santa Ana River, the Mill Creek tributary, and an urban drain tributary discovered cyanuric acid in variable concentrations up to 510 ?g/L. Cyanuric acid was isolated with a hydrophilic natural organic matter (NOM) fraction, and its identity was confirmed by a combination of infrared spectrometry, 13C-nuclear magnetic resonance (13C-NMR) spectrometry, and electrospray ionization/mass spectrometry. Cyanuric acid concentrations, based upon 13C-NMR spectral quantitation, increased during the peak and recessional flows of the storm hydrographs during three storms at three sites. The greatest fluxes of cyanuric acid were observed in the Santa Ana River during the third storm. The most likely source of cyanuric acid is as a metabolite of triazine herbicides, based on hydrographs, land uses of the drainage basins, and the yearly application rates of triazine herbicides. The daily flux of cyanuric acid in Santa Ana River stormflow during the third storm was calculated to be about 1 percent of the yearly application rate for triazine herbicides. Cyanuric acid was not detected in ground water at wells adjacent to the Santa Ana River.

Geospatial Extents

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Discovery of Cyanuric Acid During an Assessment of Natural Organic Matter in Stormflow Water of the Santa Ana River, Southern California, 2003-2004
Series title:
Scientific Investigations Report
Series number:
2007-5048
Edition:
Version 1.0
Year Published:
2007
Language:
ENGLISH
Publisher:
Geological Survey (U.S.)
Contributing office(s):
U.S. Geological Survey
Description:
vi, 13 p.
Time Range Start:
2003-01-01
Time Range End:
2004-12-31
Online Only (Y/N):
Y