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MDA Presenter: Neal Kittelson

The presentation introduced a new MDA project developing interactive maps based on the MDA’s pesticide water quality monitoring data. The project aims to present monitoring data in an interactive format and to improve access to site-specific data while acting as a companion to the PDF annual report. An overview of the ArcGIS stories was presented along with demonstrations of various interactive maps and tables.

Discussion focused on:

• Additional features to consider
  • Inclusion of groundwater data from pre-2000 was discussed. All data is being taken directly from the Water Quality Portal which does not currently include pre-2000 groundwater data.
  • Adding the USDA crop layer to the maps was discussed. It was noted that this was initially included; however, it slowed the program down and was removed. There is potential to add the layer back in.
  • How to account for additivity in comparisons of detected concentrations to reference values was discussed. The MDA plans to explore ways to allow for this comparison, and, at a minimum, additivity for atrazine and cyanazine with their degradates will be noted in the text.
• Potential for misinterpretation of data

All maps/graphs/tables will be accompanied by text, directions, and appropriate disclaimers. Use of ArcGIS stories also allows for the inclusion of key background information about the program, analysis, and evaluation of data.

Raj provided an update on treated seeds and MDA’s authority to take action to prevent unreasonable adverse effects. He explained that while MDA now has this authority, treated seeds will not be handled the same as pesticides. The MDA also received money for pollinator research which may be used to study pesticide treated seed.

Discussion focused on:

• Pesticides in precipitation
  • A member expressed concerns over the presence of pesticides in rain and requested the report focus more on these results.
• Aquatic life benchmarks and water quality standards for neonicotinoids
  • It was explained that MDA does not develop reference values and uses guidance from the MN Pollution Control Agency.
  • Currently, there are no promulgated standards for neonics in surface water. The neonics are on the MPCA’s list of standards to develop; however, they have not been prioritized.