mpca groundwater monitoring and assessment glenn skuta water m onitoring manager
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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 - PowerPoint PPT PresentationTRANSCRIPT
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MPCA GroundwaterMonitoring and Assessment
Glenn Skuta Water Monitoring Manager
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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
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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
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MPCA’S Ambient GW Network
• 205 wells• 80 wells left to install
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CEC Study Report Available
http://www.pca.state.mn.us/index.php/view-document.html?gid=17244
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Contaminants of Emerging Concern
Chemicals not commonly monitored in the environmentor regulated
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About 100 Emerging Contaminants• Antibiotics• Pharmaceuticals• Fire Retardants• Insect Repellent (DEET)• Detergent Metabolites• Personal Care Products• Hormones
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40 Wells Sampled for CECs
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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.
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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
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Chloride-- Sand and Gravel Aquifers
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Chloride Trends
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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
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1985 1990 1995 2000 2005 20100
300
600
900
1200
Pumping for Wells <1 km from Little Rock Creek
Milli
on g
allo
ns
9/1/2002 5/28/2005 2/22/2008
0
2
4
6
8
10
Obwell 5004 – groundwater level
Fee
t bel
ow g
roun
d le
vel
1940 1960 1980 2000 202010
20
30
40 Pierz_precipLinear (Pierz_precip)Five_yr moving avg
Inch
es
Source: http://climate.umn.edu/doc/histori-cal.htm
Precipitation
Little Rock Creek – Benton Cty.
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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 Service and DNR