Surface Water Database (SURF)

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The Department of Pesticide Regulation maintains a Surface Water Database (SURF) containing data from a wide variety of environmental monitoring studies designed to test for the presence or absence of pesticides in California surface waters. As part of DPR’s effort to provide public access to pesticide information, this site provides access to data from DPR’s Surface Water Database.

General description of the database

Access the data

What's new?

The recent major update of SURF database was released in June 2017. This update features a major effort to better incorporate data from other agencies, including the CEDEN database of the California State Water Resources Control Board and the NWIS database of the United States Geological Survey. All qualified pesticide data from CEDEN and NWIS (California sites) that were available for download in May 2017 have been incorporated into SURF.

The 2017 annual update included 509,923 new water results and 63,965 new sediment results from 294 studies from various agencies including DPR. Six hundred and sixty-nine new monitoring sites were added to the database making the total number of sites 3,895. The most recent water sample was taken on April 20, 2017. And the most recent sediment sample was taken on September 29, 2016. SURF now contains 902,098 results of water samples and 78,047 results of sediment samples.

Submitting Data to DPR's SURF Database

DPR encourages submission of surface water monitoring data from any organization that conducts studies designed to monitor for the presence of pesticides in California surface water. DPR accepts data submissions that fulfill the minimum requirements shown below. Data in electronic format (spreadsheet, txt, or csv format) required.

  • Name of sampling agency or organization
  • Date that each sample was collected
  • Date of each sample analysis
  • County where samples were taken
  • Detailed sampling location information (including latitude and longitude, with datum specified (NAD83, WGS84, etc.)
  • Name or description of water body sampled
  • Name of the active ingredient analyzed
  • Concentration detected (with unit of measurement)
  • Limit of quantitation (with unit of measurement)
  • Description of analytical QA/QC plan, or statement that no formal plan exists

For content questions, contact:
Xuyang Zhang, Ph.D.
1001 I Street, P.O. Box 4015
Sacramento, CA 95812-4015
Phone: (650) 493-1082