Scientific Investigations Report 2007–5261
U.S. GEOLOGICAL SURVEY
Scientific Investigations Report 2007–5261
Table 4. Summary of exceedances of drinking-water standards for chemical constituents with available analyses from more than 25 sampling sites, Basin and Range carbonate-rock aquifer system study area, Nevada and Utah.
[Drinking-water standards: All values are in milligrams per liter except for pH, which is in standard units. –, no standard]
| Constituent | Drinking-water standards | Number of sampling sites | |||
|---|---|---|---|---|---|
| Primary | Secondary | Constituent detected |
Exceeding standard |
||
| Antimony | 0.006 | – | 112 | 0 | |
| Arsenic | 0.01 | – | 90 | 2 | |
| Barium | 2 | – | 146 | 0 | |
| Beryllium | 0.004 | – | 146 | 1 | |
| Cadmium | 0.005 | – | 147 | 0 | |
| Chloride | – | 250 | 179 | 6 | |
| Chromium | 0.1 | – | 54 | 0 | |
| Copper | – | 1 | 38 | 0 | |
| Fluoride | 4 | – | 122 | 4 | |
| Iron | – | 0.3 | 37 | 2 | |
| Manganese | – | 0.05 | 48 | 2 | |
| pH | – | 16.5-8.5 | 179 | 21 | |
| Selenium | 0.05 | – | 35 | 0 | |
| Sulfate | – | 250 | 177 | 4 | |
| Thallium | 0.002 | – | 112 | 0 | |
| Zinc | – | 5 | 147 | 1 | |
1Acceptable range for pH.
U.S. Department of the Interior | U.S. Geological Survey
URL: https://pubs.usgs.gov/sir/2007/5261
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