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RT @USGS_MN: Fact sheet: Groundwater quality in the Cambrian-Ordovician aquifer system, midwestern United States. https://t.co/5txLVQ9gN3…
RT @USGS_MN: Fact sheet: Groundwater quality in the Cambrian-Ordovician aquifer system, midwestern United States. https://t.co/5txLVQ9gN3…
Fact sheet: Groundwater quality in the Cambrian-Ordovician aquifer system, midwestern United States. https://t.co/5txLVQ9gN3 The C-O aquifer provides water to many towns in SE Minnesota. #WaterQuality #NAWQA #USGS https://t.co/P6mLkzpI2a