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   How much nitrite ion does EPA use per day?

   • EPA has set an RfD of 0.l mg nitrite nitrogen/kg body weight per day (equivalent to 0.33 mg nitrite ion/kg body weight per day) [Mensinga et al. 2003; Abadin et al. 1998; EPA 2002; EPA 2012].

   Nitrate/Nitrite Toxicity: What Are U.S. Standards and Regulations for

   www.atsdr.cdc.gov/csem/nitrate-nitrite/standards.html

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   How much nitrate is in groundwater?

   • The data in this indicator show the total area and percent of state area predicted to have nitrate concentrations exceeding EPA’s MCL, or 10 mg/l in groundwater used for drinking. Also presented is the estimated percent of state populations served by self-supplied drinking water, 98% of which is from groundwater wells.

   Estimated Nitrate Concentrations in Groundwater Used for Drinking

   www.epa.gov/nutrientpollution/estimated-nitrate-concentrations-groundwater-used-drinking

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   Is nitrate in groundwater drinking water a problem?

   • Nitrate in groundwater drinking water systems is of concern because private self-supplied drinking water systems, which primarily draw from groundwater, are not federally regulated. It is the owner’s responsibility to test and treat their own well for nitrate and other pollutants.

   Estimated Nitrate Concentrations in Groundwater Used for Drinking

   www.epa.gov/nutrientpollution/estimated-nitrate-concentrations-groundwater-used-drinking

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2. www.epa.gov › ground-water-and-drinking-waterNational Primary Drinking Water Regulations | US EPA

   www.epa.gov › ground-water-and-drinking-water

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   Jan 2, 2024 · Infants below the age of six months who drink water containing nitrate in excess of the MCL could become seriously ill and, if untreated, may die. Symptoms include shortness of breath and blue-baby syndrome. Runoff from fertilizer use; leaking from septic tanks, sewage; erosion of natural deposits.

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3. www.epa.gov › sites › productionNitrate & Nitrite Rule for Transient Non-Community Water Systems

   www.epa.gov › sites › production

   The Environmental Protection Agency (EPA) has set the Maximum Contaminant Level (MCL)* for nitrate and nitrite to the following for the safety of drinking water: Nitrates MCL = 10 mg/L. Nitrites MCL = 1 mg/L.

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4. www.epa.gov › nutrientpollution › estimated-nitrateEstimated Nitrate Concentrations in Groundwater Used for Drinking

   www.epa.gov › nutrientpollution › estimated-nitrate

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   Nov 30, 2023 · EPA’s maximum contaminant level (MCL) for nitrate set to protect against blue-baby syndrome is 10 mg/l. The data in this indicator show the total area and percent of state area predicted to have nitrate concentrations exceeding EPA’s MCL, or 10 mg/l in groundwater used for drinking.

5. www.atsdr.cdc.gov › csem › nitrate-nitriteWhat Are U.S. Standards and Regulations for Nitrates and ...

   www.atsdr.cdc.gov › csem › nitrate-nitrite

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   EPA has set an enforceable standard called a maximum contaminant level (MCL) in water for nitrates at 10 parts per million (ppm) (10 mg/L) and for nitrites at 1 ppm (1 mg/L) [EPA 2002; EPA 2012]. EPA believes that exposure below this level is not expected to cause significant health problems.

6. www.epa.gov › dwreginfo › nitrate-wsgNitrate WSG | US EPA - U.S. Environmental Protection Agency

   www.epa.gov › dwreginfo › nitrate-wsg

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   Feb 21, 2024 · Nitrate WSG. Nitrates Water Supply Guidance #213. Nitrates Water Supply Guidance #213 (pdf) (157.7 KB, 11/30/2020) Nitrate Water Supply Guidance. Last updated on February 21, 2024.