Quality of ground water in agricultural areas of the San Luis Valley, south-central Colorado
Water-Resources Investigations Report
83-4281
By: Patrick Edelmann and David R. Buckles
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Abstract
The quality of ground water in the principal agricultural areas of the San Luis Valley, south-central Colorado was evaluated using chemical analyses of water collected from 57 wells completed in the unconfined aquifer and from 25 wells completed in the confined aquifer. Ground water in both aquifers generally contains dissolved-solids concentrations of less than 500 milligrams per liter. In most areas, calcium is the principal cation in the ground water. Nitrite plus nitrate concentrations expressed as nitrogen, are generally less than 1 milligram per liter. However, the quality of ground water in certain areas may pose health and agricultural hazards. Water in the unconfined aquifer near Center contains high nitrite plus nitrate as nitrogen concentrations. The highest measured concentration in this area was 33 milligrams per liter. Water containing more than 1 milligram per liter of nitrite as nitrogen, or 10 milligrams per liter nitrate, as nitrogen, poses a potential health hazard for infants and should not be used for drinking. In addition, dissolved-solids concentration in the ground water in some areas is greater than 500 milligrams per liter and, if used for irrigation may reduce crop yields. (USGS)
| Publication type | Report |
|---|---|
| Publication Subtype | USGS Numbered Series |
| Title | Quality of ground water in agricultural areas of the San Luis Valley, south-central Colorado |
| Series title | Water-Resources Investigations Report |
| Series number | 83-4281 |
| DOI | 10.3133/wri834281 |
| Edition | - |
| Year Published | 1984 |
| Language | ENGLISH |
| Publisher | U.S. Geological Survey, |
| Description | v, 37 p. :ill., maps ;28 cm. |
| Google Analytic Metrics | Metrics page |