Selected Chemical and Physical Properties and Inorganic Constituents and Time-Series Nitrate in Samples from selected wells and/or springs, Petaluma Valley watershed, Sonoma County, California, 1959-2015

Publication Date

2022-01-24

Start Date

1959-09-23

End Date

2016-05-04

Teague, N.F., and Seymour, W.A., 2022, Selected Chemical and Physical Properties and Inorganic Constituents and Time-Series Nitrate in Samples from selected wells and/or springs, Petaluma Valley watershed, Sonoma County, California, 1959-2015: U.S. Geological Survey data release, https://doi.org/10.5066/P9IRYFMB.

Type: Related Primary Publication

Water-quality samples were collected as part of this study from 11 wells, 1 spring, and 2 surface-water sites by the USGS are available in the National Water Information System (NWIS). Data reported by CDWR are from samples that were collected and analyzed following referenced methods of the American Public Health Association (2005) and the U.S. Environmental Protection Agency (1993, 1994). Water-quality data for 7 wells presented in this report were reported by the city of Petaluma, and water-quality data for 35 wells and 1 spring were reported by the CDPH (appendix C1). Appendix C2 contains time-series nitrate (as milligrams per liter of nitrogen) data for selected wells in the Petaluma Valley Watershed, Sonoma County, California. Time-series data (concentrations over time) for nitrate were evaluated to provide an understanding of temporal trends in water quality in the Petaluma Valley Watershed. Wells were chosen from wells listed in appendix C1 to maximize spatial coverage and to provide the longest periods of record.

• USGS California Water Science Center
• USGS Data Release Products