USGS NAWQA Pesticide Data from Replicate Water Samples, 2013-2015

225 pesticides were measured in duplicate surface water and groundwater samples collected by the U.S. Geological Survey between October 2012 and September 2015. The data set includes samples from 288 sites analyzed using direct aqueous-injection liquid chromatography-tandem mass spectrometry. This work was authored by Megan E. Shoda of the USGS.

Use Cases

• Assess pesticide detection frequency and concentration based on replicate sampling methodology
• Analyze spatial patterns of pesticide contamination across 288 sampling sites
• Evaluate analytical method performance for water-quality monitoring based on the described laboratory schedule
• Study temporal trends in pesticide levels in surface and groundwater over the three-year period

Strengths

• Focuses on 225 specific pesticide analytes
• Covers a three-year period from 2012 to 2015
• Includes samples from 288 distinct sites
• Based on a defined replicate sampling and analysis protocol

Limitations

• Column-level documentation is absent; field semantics must be inferred after download
• Row count is unknown, which may limit suitability assessment
• Last update date is unknown; freshness unverified

Provenance

Source

United States Geological Survey (USGS) National Water Quality Laboratory

Collection Method

Replicate water-quality samples collected and prepared in the field, analyzed via direct aqueous-injection liquid chromatography-tandem mass spectrometry (Schedule 2437).

Time Range

October 1, 2012 to September 30, 2015

Geography

Sites within the United States (implied by USGS and NAWQA project scope).