| Abstract: | In parts of Jefferson County, CO, water for domestic use from the fractured crystalline-rock aquifer contained excessive concentrations of major ions, coliform bacteria, trace elements, or radiochemicals. Based on results of analyses from 26 wells, water from 21 of the wells contained excessive concentrations of one or more constituents. Drinking water standards were exceeded for fluoride in water from 2 wells, nitrate plus nitrite in 2 wells, dissolved solids in 1 well, iron in 6 wells, manganese in 8 wells, zinc in 2 wells, coliform bacteria in 4 wells, gross alpha radiation in 11 wells and possibly 4 more, and gross beta radiation possibly in 1 well. Local variations in concentrations of 15 chemical constituents, specific conductance, and water temperature were statistically significant. Specific conductance increased significantly during 1973-75 only in the vicinity of Indian Hills. Annual range in depths to water in 11 observation wells varied from 1 to 15 feet. The shallowest water levels were recorded in late winter, usually in February. The deepest water levels occurred during summer or fall, depending on the well and the year. Three-year trends in water level changes in 6 of the 11 wells indicated decreasing water storage in the aquifer. (USGS). |
| Genre: | USGS Numbered Series |
| ProdID: | 27478 |
| Citation Author: | Hall, Dennis C.; Johnson, Carl J. |
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| Citation Language: | ENGLISH |
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| Citation Phsyical Description: | 57 p.:ill., maps ;29 cm. |
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| Citation Publisher: | U.S. Geological Survey ;
for sale by National Technical Information Service, |
| Citation Series: | Water-Resources Investigations Report |
| Citation Series Code: | WRI |
| Citation Series Number: | 79-94 |
| Citation Search Results Text: | Drinking-water quality and variations in water levels in the fractured crystalline-rock aquifer, west-central Jefferson County, Colorado; 1979; WRI; 79-94; Hall, Dennis C.; Johnson, Carl J. |
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| Citation Year: | 1979 |
| Type: | citation/reference |
| Text: | Drinking-water quality and variations in water levels in the fractured crystalline-rock aquifer, west-central Jefferson County, Colorado; 1979; WRI; 79-94; Hall, Dennis C.; Johnson, Carl J. |
| URL (THUMBNAIL): | http://pubs.usgs.gov/wri/1979/0094/report-thumb.jpg |
| URL (DOCUMENT): | http://pubs.usgs.gov/wri/1979/0094/report.pdf |
| Date Other: | Sat, 1 Jan 1994 00:00 -0600 |
| Publisher: | U.S. Geological Survey ;
for sale by National Technical Information Service, |
