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  • Estimated Nitrate Concentrations in Groundwater Used for Drinking
    While nitrate does occur naturally in groundwater, concentrations greater than 3 mg l generally indicate contamination (Madison and Brunett, 1985), and a more recent nationwide study found that concentrations over 1 mg l nitrate indicate human activity (Dubrovsky et al 2010)
  • How to interpret a water test for nitrate
    It is very difficult to determine total N loss using nitrate concentrations, as you need to know the total area contributing to the drainage system at the point of collection as well as the flow rate over time
  • Nitrate and Nitrite in Private Drinking Water Wells
    Nitrate testing should also be part of an annual, routine well water test Nitrate-nitrogen concentrations above 1 0 milligram per liter indicate potential land use impacts to water quality
  • Nitrate in Well Water - MN Dept. of Health
    The Minnesota Department of Agriculture Township Testing Program found that over 10 percent of the private wells sampled in some townships in southwestern, southeastern, central, and north-central Minnesota have nitrate levels above 10 mg L Learn more at Township Testing Program
  • Guidelines for Testing Well Water | Drinking Water | CDC
    Test your well water at least once every year for total coliform bacteria, nitrates, total dissolved solids, and pH level Contact your health department to find out what other germs or chemicals to test for based on where you live
  • How To Read Well Water Test Results - Sciencing
    This value means that no more than 10 milligrams of nitrates should be in a liter of your well water If your water contains more than this level, it can produce a condition called methemoglobinemia in infants, which affects their ability to get enough oxygen from the air
  • Interpreting Test Results - Illinois
    Nitrates: U S EPA has established a maximum contaminant level for drinking water of 10 milligrams per liter (mg L) for nitrates (measured as nitrogen) Infants below the age of 6 months who drink water containing nitrate in excess of the MCL could become seriously ill and, if untreated, may die
  • Well Water Testing: The Complete Guide for Private Wells (2025)
    A comprehensive guide covering everything you need to know about testing your private well water, from what tests to run to how to interpret results
  • How to Test Nitrates in Water (Step-By-Step)
    We’ll also discuss the EPA’s maximum limits for nitrates in drinking water, how nitrates get into water supplies, and how to prevent nitrates from contaminating your drinking water
  • OHA 8342 Nitrate in well water: What you should know
    The safe drinking water standard (also called maximum contaminant level or MCL) for nitrate is 10 mg L If your water has nitrate levels above 10 mg L, you should switch to bottled water or another source of safe drinking water and seek treatment options





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