Data sets for: Variations on a method for evaluating decadal-scale changes in the groundwater quality of two GAMA coastal study units 2004-2014, California GAMA Priority Basin Project
Description
The U.S. Geological Survey collected samples from 50 public supply wells during two distinct sampling episodes (2004-2005 and 2014) on the North-Central California coast. During each sampling episode, the samples were analyzed for 160 water-quality constituents, including water-quality indicators, nutrients, major and minor ions, trace elements, volatile organic compounds, and pesticide compounds. The paired-sample results were submitted to an evaluation method to determine whether or not step trends had occurred in the concentrations of each constituent. Quality-control samples were collected at a subset of the wells. The datasets presented here consist of a list and description of the 160 constituents, an Excel workbook which details the step trend evaluation method, and a summary of the quality-control data results.
Resources
| Name |
Format |
Description |
Link |
|
55 |
The metadata original format |
https://data.usgs.gov/datacatalog/metadata/USGS.59120da1e4b0e541a03c1ef3.xml |
|
55 |
Landing page for access to the data |
https://doi.org/10.5066/F7GH9GF5 |
Tags
- environment
- western-united-states
- sonoma-county
- groundwater
- trend-evaluation
- quality-control
- marin-county
- san-luis-obispo-county
- united-states
- water-quality
- monterey-county
- california
- napa-county
- santa-cruz-county
- usgs-59120da1e4b0e541a03c1ef3