Nitrates

Nitrate Contamination of Groundwater

Levels of nitrate in groundwater are usually higher than in surface water

conservatively high USGS estimate of baseline groundwater concentration = 3 mg/L
in 1/3 of US counties tested, 25% wells were above that baseline level
in 5% " " " " , 25% " were > federal water quality criteria = 10 mg/L
highest concentrations in US well waters > 100 mg/L

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Human health

 

Environmental

 

 

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