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MPCA Groundwater Monitoring and Assessment Glenn Skuta Water M onitoring Manager

MPCA Groundwater Monitoring and Assessment Glenn Skuta Water M onitoring Manager. MPCA Groundwater Roles. Monitor groundwater quality in non-agricultural parts of the state Determine groundwater-surface water interactions Evaluate groundwater protection BMPs

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MPCA Groundwater Monitoring and Assessment Glenn Skuta Water M onitoring Manager

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  1. MPCA GroundwaterMonitoring and AssessmentGlenn Skuta Water Monitoring Manager

  2. MPCA Groundwater Roles • Monitor groundwater quality in non-agricultural parts of the state • Determine groundwater-surface water interactions • Evaluate groundwater protection BMPs • Groundwater contamination remediation programs

  3. MPCA Groundwater Monitoring • Developing a robust groundwater quality monitoring network • Report on contaminants of emerging concern (CEC) in groundwater unparalleled nationally • Participant in national groundwater monitoring network pilot

  4. MPCA’S Ambient GW Network • 205 wells • 80 wells left to install

  5. CEC Study Report Available http://www.pca.state.mn.us/index.php/view-document.html?gid=17244

  6. Contaminants of Emerging Concern Chemicals not commonly monitored in the environment or regulated

  7. About 100 Emerging Contaminants • Antibiotics • Pharmaceuticals • Fire Retardants • Insect Repellent (DEET) • Detergent Metabolites • Personal Care Products • Hormones

  8. 40 Wells Sampled for CECs

  9. CEC Report Summary • Low frequency and low levels of detection, even though wells more likely to be contaminated were targeted for this study. • Emerging contaminants were present in 13 of the 40 wells monitored. • Endocrine Active Compounds were detected in 3 of the 40 wells. • GW affected by landfill leachate had the largest number of detections and highest total concentrations, but still well below risk levels. • Further monitoring will refine this assessment.

  10. Additional Reports Coming Soon • Update to CEC report coming this summer using triple the amount of wells • Overall ambient groundwater network report coming this spring • Significant finding on chloride

  11. Chloride-- Sand and Gravel Aquifers

  12. Chloride Trends

  13. Groundwater-Surface water Interaction Studies • Investigations have linked increases in ground water extraction (municipal uses and irrigation) to stream flow reductions and lowered lake levels • MPCA was the primary cooperative funder of the USGS study of altered groundwater flow affecting the level of White Bear Lake • Identified reduced contribution of groundwater to surface water as a stressor in the Little Rock Creek TMDL study

  14. Little Rock Creek – Benton Cty. Precipitation

  15. Additional Groundwater-Surface Water Hydrology Research • Refining groundwater recharge estimates with USGS –project will be complete in 2014 • Synthetic hydrograph (streamflow estimation) project with USGS • Enhancing precipitation network - automated rain gages to be installed at stream gaging stations – cooperative effort with National Weather Serviceand DNR

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