The Source of Arsenic and Nitrate in Borrego Valley Groundwater Aquifer


Groundwater in California is very precious, yet what we can withdraw is often contaminated with natural and anthropogenic pollution sources. We have examined the Borrego Valley (BV) groundwater (N = 6 wells) in southern California to understand the source of arsenic and nitrate in some of its groundwater production wells. The results show that the arsenic values range from <2 ppb to 12.2 ppb and the nitrate values from <1 ppm to 10.2 ppm for different wells respectively. The results showed that the arsenic concentration increased 270% for the well # ID1-10 since 2004 and showed an increase of 63% since 2013 respectively. For other wells the results showed an increase of 147% and 72% since 2001. The nitrate concentration has jumped 42% in concentration since last year in one of the wells. The objective of this study is to understand the nature and source of arsenic and nitrate in BV groundwater aquifer as to how this change in arsenic and nitrate concentration occurs through the time. The arsenic retention in the sediments is highly variable and controlled by local processes as a result of natural weathering process of metamorphic bedrock. The second results from the development of strongly reducing conditions at near-neutral pH values, leading to the desorption of arsenic from mineral oxides and to the reductive dissolution of Fe and Mn oxides, also leading to arsenic release. The high arsenic concentrations in some groundwater wells in Borrego Valley CA require the need for reconnaissance surveys in mineralized areas of fractured crystalline basement. Net groundwater extraction values are based on an irrigation efficiency of 78 percent with 14 to 22 percent irrigation return. We believe that the return flow from irrigational activity could be one of the major sources of nitrate transferring the agricultural contaminants such as nitrate to Borrego Valley aquifer.

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Rezaie-Boroon, M. , Chaney, J. and Bowers, B. (2014) The Source of Arsenic and Nitrate in Borrego Valley Groundwater Aquifer. Journal of Water Resource and Protection, 6, 1589-1602. doi: 10.4236/jwarp.2014.617145.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Water Education Foundation (2006) Where Does My Water Come from? Sacramento, Calif., Water Education Foundation.
[2] Netto, S.P. (2001) Water Resources of Borrego Valley San Diego County, California. Thesis, Master of Science in Geological Sciences, 159 p.
[3] Mathany, T.M., Wright, M.T., Beuttel, B.S. and Belitz, K. (2012) Groundwater-Quality Data in the Borrego Valley, Central Desert, and Low-Use Basins of the Mojave and Sonoran Deserts Study Unit, 2008-2010—Results from the California GAMA Program. U.S. Geological Survey Data Series 659, 100 p.
[4] Welch, A.H., Lico, M.L.S. and Hughes, J.L. (1988) Arsenic in Ground Water of the Western United States. Groundwater, 26, 333-347.
[5] Fetter, C.W. (2008) Contaminant Hydrogeology. 2nd Edition, Waveland Press Inc., Long Grove, 500 p.
[6] Azaza, F.H., Ketata, M., Bouhlila, R., Gueddari, M. and Riberio, L. (2010) Hydrogeochemical Characteristics and Assessment of Drinking Water Quality in Zeuss-Koutine Aquifer, Southeastern Tunisia. Environmental Monitoring and Assessment, 174, 283-298.
[7] Carrillo-Rivera, J.J., Varsányi, I., Kovács, L.ó. and Cardona, A. (2007) Tracing Groundwater Flow Systems with Hydrogeochemistry in Contrasting Geological Environments. Water, Air, & Soil Pollution, 184, 77-103.
[8] Spalding, R.F. and Exner, M.E. (1993) Occurrence of Nitrate in Groundwater—A Review. Journal of Environmental Quality, 22, 392-402.
[9] Mandal, B.K., Chowdhury, T.R., Samanta, G., Mukherjee, D.P., Chanda, C.R., Saha, K.C. and Chakraborti, D. (1996) Impact of Safe Water for Drinking and Cooking on Five Arsenic-Affected Families for 2 Years in West Bengal, India. Science of the Total Environment, 218, 185-201.
[10] Ravenscroft, P., McArthur, J.M. and Hoque, V. (2001) Geochemical and Palaeohydrological Controls on Pollution of Groundwater by Arsenic. In: Chappell, W.R., Abernathy, C.O. and Calderon, R., Eds., Arsenic Exposure and Health Effects IV, Elsevier Science Ltd., Oxford, 53-77.
[11] Schreiber, M.E., Gotkowitz, M.B., Simo, J.A. and Freiberg, O.G. (2003) Mechanisms of Arsenic Release to Ground Water from Naturally Occurring Sources, Eastern Wisconsin. In: Welch, A.H. and Stollenwerk, K.G., Eds., Arsenic in Ground Water, Kluwer Academic Publishers, Dordrecht, 259-280.
[12] Acharyya, S.K., Lahiri, S., Raymahashay, B.C. and Bhowmik, A. (2000) Arsenic Toxicity of Groundwater in Parts of the Bengal Basin, in India and Bangladesh: Role of Quaternary Stratigraphy and Holocene Sea-Level Fluctuation. Environmental Geology, 39, 1127-1137.
[13] McArthur, J.M., Banerjee, D.M., Hudson-Edwards, K.A., Mishra, R., Purohit, R., Ravenscroft, P., Cronin, A., Howarth, R.J., Chatterjee, A., Talukder, T., Lowry, D., Houghton, S. and Chadha, D.K. (2004) Natural Organic Matter in Sedimentary Basins and Its Relation to Arsenic in Anoxic Ground Water: The Example of West Bengal and Its Worldwide Implications. Applied Geochemistry, 19, 1255-1293.
[14] Rezaie-Boroon, M.H., Gnandi, K. and Folly, K.T. (2011) Presence and Distribution of Toxic Trace Elements in Water and Sediments of the Southern Togo Rivers Watershed, West Africa. PSP Environmental Bulitin, 20, 1853-1865.
[15] Mills, W.R. (2009) Integrated Water Resources Management Plan. Final Report, 128 p.
[16] California Department of Water Resources DWR (2004) California’s Groundwater Individual Basin Descriptions. California Department of Water Resources Bulletin 118, Lucerne Valley.
[17] Moyle Jr., W.R. (1982) Water Resources of Borrego Valley and Vicinity, California; Phase 1-Definition of Geologic and Hydrologic Characteristics of Basin. U.S. Geological Survey Open-File Report 82-855, 39 p.
[18] Mitten, H.T., Lines, G.C., Berenbrock, C. and Durbin, T.J. (1988) Water Resources of Borrego Valley and Vicinity, San Diego County, California: Phase 2-Development of a Ground-Water Flow Model. U.S. Geological Survey Water-Resources Investigations Report 87-4199, 27 p.
[19] Smedley, P.L., Nicolli, H.B., Macdonald, D.M.J., Barros, A.J. and Tullio, J.O. (2002) Hydrogeochemistry of Arsenic and Other Inorganic Constituents in Groundwater from La Pampa, Argentina. Applied Geochemistry, 17, 259-284.
[20] Wilde, F.D. (2004) Cleaning of Equipment for Water Sampling (Ver. 2.0). U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chap. A3.
[21] Wilde, F.D., Radtke, D.B., Gibs, J. and Iwatsubo, R.T. (1999) Collection of Water Samples (Ver. 2.0). U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chap A4.
[22] Jahin, H.S. and Gaber, S.E. (2011) Study of Groundwater Quality in El-Kharga Oasis, Western Desert, Egypt. Asian Journal of Water, Environment and Pollution, 8, 1-7.
[23] Raju, N.J., Ram, P. and Dey, S. (2009) Groundwater Quality in the Lower Varuna River Basin, Varanasi District, Uttar Pradesh. Journal of the Geological Society of India, 73, 178-192.
[24] Dibblee Jr., T.W. (1984) Stratigraphy and Tectonics of the San Felipe Hills, Borrego Badlands, Superstition Hills, and vicinity. In: Rigsby, C.A., Ed., The Imperial Basin-Tectonics, Sedimentation, and Thermal Aspects, Pacific Section SEPM, Los Angeles, 31-34.
[25] Parsons, M.C., Hancock, T.C., Kulongoski, J.T. and Belitz, K. (2014) Status of Groundwater Quality in the Borrego Valley, Central Desert, and Low-Use Basins of the Mojave and Sonoran Deserts Study Unit, 2008-2010: California GAMA Priority Basin Project. USGS Scientific Investigations Report: 2014-5001, 88 p.
[26] Threet, R.L. (1972) Hydrogeology of Southern Borrego Valley. Prepared 13 April 1972 for: George J. Kuhrts III, Borrego Springs, California.
[27] Pazand, K. and Fereidoni Sarvestani, J. (2013) Hydrogeochemical Investigation in an Arid Region of Iran (Tabas, Central Iran). Environmental Earth Sciences, 70, 743-752.
[28] Henkel, S. and Polette, D. (1999) Arsenic in Ground Water of the Willamette Basin, Oregon. U.S. Geological Survey Water-Resources Investigations Report 98-4205, 27 p.
[29] Stein, C.L., Brandon, W.C. and McTigue, D.F. (2005) Arsenic Behavior under Sulfate-Reducing Conditions: Beware of the “Danger Zone”. EPA Science Forum 2005: Collaborative Science for Environmental Solutions, 16-18 May 2005, Washington DC.
[30] Andrews, J.E., Brimblrcombe, P., Jickells, T.D., Liss, P.S. and Reid, B.J. (2003) An Introduction to Environmental Chemistry. 2nd Edition, Wiley-Blackwell, Hoboken, 296 p.
[31] Gopal, B.K. (1990) Investigation of Nitrate Contamination in Shallow Ground Waters near Wood Ward, Oklahoma. Ground Water Quality and Agricultural Practices. Lewis Publishers, Boca Raton, 247-264.
[32] Rutkoviene, V., Kusta, A. and èesoniene, L. (2005) Environmental Impact on Nitrate Levels in the Water of Shallow Wells. Polish Journal of Environmental Studies, 14, 631-637.
[33] Prudic, D.E. (1994) Estimates of Percolation Rates and Ages of Water in Unsaturated Sediments at Two Mojave Desert sites, California-Nevada. U.S. Geological Survey Water Resources Investigations Report 94-4160, 19 p.
[34] Murgulet, D. and Tick, G.R. (2009) Assessing the Extent and Sources of Nitrate Contamination in the Aquifer System of Southern Baldwin County, Alabama. Environmental Geology, 58, 1051-1065.
[35] Vogelmann, J.E., Howard, S.M., Yang, L., Larson, C.R., Wylie, B.K. and Van Driel, N. (2001) Completion of the 1990s National Land Cover Data Set for the Coterminous United States from Landsat Thematic Mapper Data and Ancillary Data Sources. Photogrammetric Engineering & Remote Sensing, 61, 650-662.

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