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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Suez

Nitrate, a fertilizer chemical, frequently contaminates drinking water due to agricultural and urban runoff, and discharges from municipal wastewater treatment plants and septic tanks. Excessive nitrate in water can cause oxygen deprivation in infants and increase the risk of cancer. Click here to read more about nitrate.

MORE ABOUT THIS CONTAMINANT

 

433

Samples

0

Samples exceeding legal limit (MCL)

261

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20140.781 ppm6841ND - 4.20 ppm
20150.791 ppm6941ND - 4.70 ppm
20160.767 ppm7040ND - 4.60 ppm
20170.823 ppm7140ND - 5.10 ppm
20181.09 ppm7648ND - 6.70 ppm
20191.08 ppm7951ND - 7.10 ppm

ppm = parts per million

State and national drinking water standards and health guidelines

EWG Health Guideline 0.14 ppm

The EWG Health Guideline of 0.14 ppm for nitrate was defined by EWG . This health guideline protects against cancer and harm to fetal growth and development.

EPA Maximum Contaminant
Level (MCL) 10 ppm

The legal limit for nitrate, established in 1962, was developed to protect infants from acute methemoglobinemia, a life-threatening disorder of oxygen transport in the body. This limit does not fully protect against the risk of cancer and harm to the developing fetus.

ppm = parts per million

All test results

Date Lab ID Result
2014-03-04I14077250.200 ppm
2014-03-04I1407732ND
2014-03-04I14077184.20 ppm
2014-03-04N14077160.500 ppm
2014-03-04N14077231.50 ppm
2014-03-04N1407722ND
2014-03-04N1407720ND
2014-03-04I1407728ND
2014-03-04I14077272.90 ppm
2014-03-04I1407726ND
2014-03-04I14077310.200 ppm
2014-03-04I14077301.30 ppm
2014-03-04N1407733ND
2014-03-04I14077351.20 ppm
2014-06-05I14203760.500 ppm
2014-06-06I14205560.500 ppm
2014-06-06I14205541.60 ppm
2014-06-06I14205603.60 ppm
2014-06-06I14205582.20 ppm
2014-06-06I1420559ND
2014-06-09I1420783ND
2014-06-09N1420784ND
2014-06-09I14207762.00 ppm
2014-06-09I1420779ND
2014-06-09I14207813.10 ppm
2014-06-09I14207742.50 ppm
2014-06-09I1420782ND
2014-06-09I1420772ND
2014-06-10I1421072ND
2014-06-10I14210730.400 ppm
2014-06-10I1421071ND
2014-06-10I1421075ND
2014-06-10I14210741.70 ppm
2014-06-12I14214924.10 ppm
2014-06-12I14214981.40 ppm
2014-06-12I1421497ND
2014-06-12N1421496ND
2014-06-12I14214940.200 ppm
2014-06-17N14223280.900 ppm
2014-06-17I1422335ND
2014-06-17N14223310.700 ppm
2014-06-17I14223300.400 ppm
2014-06-25I14235280.300 ppm
2014-06-25N14235270.600 ppm
2014-06-26I14237851.20 ppm
2014-06-27I14240041.000 ppm
2014-07-01N14245620.700 ppm
2014-07-01I1424564ND
2014-07-01I1424561ND
2014-07-01I1424560ND
2014-07-01I14245650.800 ppm
2014-07-08I1425431ND
2014-07-08I14254280.300 ppm
2014-07-08N14254270.500 ppm
2014-07-08N1425430ND
2014-07-16I14270581.20 ppm
2014-07-16N14270631.20 ppm
2014-07-16I14270642.40 ppm
2014-07-17I1427228ND
2014-07-30N1429107ND
2014-07-30I14291130.400 ppm
2014-07-30I1429112ND
2014-07-30I14291110.400 ppm
2014-07-301429110ND
2014-08-05I14298650.700 ppm
2014-08-05I14298671.10 ppm
2014-08-05I14298641.30 ppm
2014-08-11I1.20 ppm
2015-03-06N15086561.70 ppm
2015-03-06N15086571.70 ppm
2015-03-06N1508658ND
2015-03-06N15086593.10 ppm
2015-03-06N1508661ND
2015-03-09I15088600.500 ppm
2015-03-09N1508867ND
2015-03-09I15088650.300 ppm
2015-03-09N15088620.300 ppm
2015-03-09N15088614.70 ppm
2015-03-12N1509543ND
2015-03-12I1509544ND
2015-05-27N1520478ND
2015-05-27N15204801.30 ppm
2015-05-27I1520479ND
2015-05-28N15206513.60 ppm
2015-05-28N1520650ND
2015-05-28N15206493.40 ppm
2015-05-28I1520653ND
2015-05-28N15206483.30 ppm
2015-06-04I1521791ND
2015-06-04N15217750.500 ppm
2015-06-04N15217742.10 ppm
2015-06-04I15217790.600 ppm
2015-06-04N15217723.90 ppm
2015-06-04N15217711.20 ppm
2015-06-09N15225300.700 ppm
2015-06-09N1522526ND
2015-06-09I15225320.600 ppm
2015-06-09I15225291.000 ppm
2015-06-09I1522527ND
2015-06-15N1523186ND
2015-06-15N1523185ND
2015-06-15N15231880.800 ppm
2015-06-16I1523454ND
2015-06-16I1523455ND
2015-06-24I15252960.300 ppm
2015-06-24N15252981.000 ppm
2015-06-24I1525301ND
2015-06-24N15253000.300 ppm
2015-06-24I15252932.00 ppm
2015-07-14N15283260.300 ppm
2015-07-14N1528330ND
2015-07-15N15286710.400 ppm
2015-07-15N1528676ND
2015-07-15I15286811.30 ppm
2015-07-15N15286751.40 ppm
2015-07-15N1528673ND
2015-07-15I15286690.400 ppm
2015-07-15I15286800.700 ppm
2015-07-15I15286821.10 ppm
2015-07-17N1529096ND
2015-07-17I15290950.600 ppm
2015-07-17N15290940.400 ppm
2015-07-17N15290930.900 ppm
2015-07-20N1529254ND
2015-07-22N15297512.30 ppm
2015-07-22N1529748ND
2015-07-22I1529742ND
2015-07-22I15297501.20 ppm
2015-07-22N15297490.300 ppm
2015-07-24N1530231ND
2015-07-24N1530228ND
2015-07-24I15302300.900 ppm
2015-07-24N1530226ND
2015-07-24N1530227ND
2015-08-05N15324251.20 ppm
2015-08-06N15326971.20 ppm
2015-08-24N15356181.10 ppm
2016-02-02I16044660.800 ppm
2016-03-30I16127571.80 ppm
2016-03-30I16127560.300 ppm
2016-03-30I16127554.00 ppm
2016-03-31I1612950ND
2016-03-31I1612951ND
2016-06-23I16276514.60 ppm
2016-06-23I16276464.00 ppm
2016-06-23I1627644ND
2016-06-23I1627652ND
2016-06-23I1627653ND
2016-06-23I1627647ND
2016-06-23I16276493.60 ppm
2016-06-24I1627836ND
2016-06-24N1627834ND
2016-06-24I16278401.20 ppm
2016-06-24I1627839ND
2016-06-24I16278383.80 ppm
2016-06-24I16278311.30 ppm
2016-06-27I16281171.000 ppm
2016-06-27I16281261.000 ppm
2016-06-27I16281240.700 ppm
2016-06-27I1628122ND
2016-06-27I16281231.20 ppm
2016-06-27I16281251.30 ppm
2016-06-27I16281201.30 ppm
2016-06-27I16281190.800 ppm
2016-06-27I1628115ND
2016-06-27I16281271.10 ppm
2016-06-27I1628118ND
2016-06-27I1628113ND
2016-06-27I1628111ND
2016-06-28I1628435ND
2016-06-28I1628437ND
2016-06-28I1628439ND
2016-06-28I1628440ND
2016-06-28I1628441ND
2016-06-28I16284341.80 ppm
2016-06-29I1628656ND
2016-06-29I1628651ND
2016-06-29I1628657ND
2016-06-29I16286531.50 ppm
2016-06-30I16287580.500 ppm
2016-06-30I1628753ND
2016-06-30I1628755ND
2016-06-30I16287570.200 ppm
2016-07-06I16295830.200 ppm
2016-07-06I1629588ND
2016-07-06I16295811.70 ppm
2016-07-06I16295850.500 ppm
2016-07-06I16295862.20 ppm
2016-07-06I1629587ND
2016-07-07I1629726ND
2016-07-07I1629727ND
2016-07-07I16297290.500 ppm
2016-07-07I16297301.20 ppm
2016-07-07I16297280.300 ppm
2016-07-07I16297320.500 ppm
2016-07-07N16297310.300 ppm
2016-07-13I16308390.400 ppm
2016-07-13I16308371.10 ppm
2016-07-13I1630838ND
2016-07-15I16314320.600 ppm
2016-07-15I16314310.900 ppm
2016-07-15I16314341.000 ppm
2016-07-15I16314330.700 ppm
2016-08-02I1634614ND
2016-08-02I16346160.300 ppm
2016-08-15I16367671.30 ppm
2016-08-15I16367682.20 ppm
2017-03-13I17098992.00 ppm
2017-03-13I1709900ND
2017-03-13I1709901ND
2017-03-14I1710137ND
2017-03-14I1710138ND
2017-03-14I1710138ND
2017-03-14I17101340.300 ppm
2017-03-14I1710137ND
2017-03-14I1710140ND
2017-03-14I17101354.70 ppm
2017-04-25I17164220.800 ppm
2017-05-30I1722581ND
2017-05-30I17225791.50 ppm
2017-05-30I1722577ND
2017-05-30I17225742.10 ppm
2017-05-31I1722760ND
2017-05-31I17227574.20 ppm
2017-05-31I1722755ND
2017-05-31I1722752ND
2017-05-31I17227512.10 ppm
2017-05-31I1722763ND
2017-05-31I1722762ND
2017-05-31I17227612.50 ppm
2017-05-31I17227584.80 ppm
2017-06-06I17236552.20 ppm
2017-06-06I1723654ND
2017-06-06I17236591.20 ppm
2017-06-19I17261111.10 ppm
2017-06-19I1726108ND
2017-06-21I17267221.000 ppm
2017-06-21I17267741.20 ppm
2017-06-21I17267750.300 ppm
2017-06-21I1726776ND
2017-06-21I1726777ND
2017-06-21I17267791.10 ppm
2017-06-21I1726781ND
2017-06-21I1726782ND
2017-06-22I17269600.300 ppm
2017-06-22I1726962ND
2017-06-22I1726966ND
2017-06-22I17269640.700 ppm
2017-06-22I17269650.400 ppm
2017-06-26I1727441ND
2017-06-26I17274390.600 ppm
2017-06-26I1727440ND
2017-07-10I17298760.900 ppm
2017-07-10I17298771.20 ppm
2017-07-11I17301350.900 ppm
2017-07-11I1730137ND
2017-07-17I17313030.200 ppm
2017-07-17I17313060.300 ppm
2017-07-17I1731304ND
2017-07-20I17322140.500 ppm
2017-07-20I17322171.000 ppm
2017-07-20I17322150.700 ppm
2017-07-25I17328140.300 ppm
2017-07-25I17328110.800 ppm
2017-07-25I17328130.400 ppm
2017-08-03I17345700.400 ppm
2017-08-03I17345671.30 ppm
2017-08-03I1734565ND
2017-08-14I1736475ND
2017-08-14I17364761.20 ppm
2017-08-14I17364772.40 ppm
2017-08-28I17388630.500 ppm
2017-08-28I1738862ND
2017-08-28I1738861ND
2017-08-28I17388601.40 ppm
2017-08-28I1738859ND
2017-08-28I17388583.80 ppm
2017-09-26I17445475.10 ppm
2018-02-01I18045952.00 ppm
2018-02-01I18045930.300 ppm
2018-02-05I18049860.700 ppm
2018-02-06I1805274ND
2018-02-06I1805276ND
2018-02-06I18052800.200 ppm
2018-02-06I1805278ND
2018-02-12I1806151ND
2018-02-12I18061535.90 ppm
2018-02-12I18061524.10 ppm
2018-03-12I18105410.200 ppm
2018-05-15I18218600.500 ppm
2018-05-15I18218542.20 ppm
2018-05-15I18218632.30 ppm
2018-05-15I1821851ND
2018-05-23I1823162ND
2018-05-23I18231632.50 ppm
2018-05-23I1823164ND
2018-05-23I18231653.40 ppm
2018-06-05I1825330ND
2018-06-05I18253311.10 ppm
2018-06-05I1825332ND
2018-06-05I18253290.800 ppm
2018-06-05I18235330ND
2018-06-06I18255870.600 ppm
2018-06-06I18255821.30 ppm
2018-06-06I18255842.10 ppm
2018-06-06I18255830.800 ppm
2018-06-06I1825581ND
2018-06-06I18255881.20 ppm
2018-06-12I18264980.300 ppm
2018-06-12I18264971.80 ppm
2018-06-12I1826496ND
2018-06-15I18273451.10 ppm
2018-06-15I1827347ND
2018-06-15I18273491.60 ppm
2018-06-15I18273465.10 ppm
2018-06-15I1827348ND
2018-06-21I1828643ND
2018-06-21I18286410.200 ppm
2018-06-21I1828602ND
2018-06-21I1828605ND
2018-06-21I18286446.30 ppm
2018-06-21I1828604ND
2018-06-21I18286030.300 ppm
2018-06-21I1828606ND
2018-06-21I18286082.40 ppm
2018-06-26I18293431.30 ppm
2018-06-26I1829344ND
2018-06-26I1829342ND
2018-06-26I18293450.400 ppm
2018-06-26I18293410.300 ppm
2018-07-02I1830576ND
2018-07-02I1830574ND
2018-07-02I1830573ND
2018-07-02I18305720.300 ppm
2018-07-02I18305770.700 ppm
2018-07-02I18305781.000 ppm
2018-07-02I18305751.30 ppm
2018-07-02I1830571ND
2018-07-05I18311630.800 ppm
2018-07-10I18320310.400 ppm
2018-07-10I18320362.30 ppm
2018-07-10I18320290.500 ppm
2018-07-10I18320421.10 ppm
2018-07-10I18320440.700 ppm
2018-07-10I18320330.400 ppm
2018-07-10I18320341.20 ppm
2018-07-10I18320380.300 ppm
2018-07-18I1833957ND
2018-08-15I18398276.70 ppm
2018-08-23I1841238ND
2018-08-23I18412401.20 ppm
2018-08-23I18412374.50 ppm
2018-08-23I1841239ND
2018-11-08I18555716.40 ppm
2019-01-31I1904611ND
2019-01-31I19046152.50 ppm
2019-02-07I19057232.20 ppm
2019-02-07I19057270.900 ppm
2019-02-07I1905724ND
2019-02-19I1907388ND
2019-02-19I19073860.300 ppm
2019-03-06I19098650.400 ppm
2019-03-06I1909868ND
2019-03-26I19133573.00 ppm
2019-03-26I19133566.30 ppm
2019-03-27I19135284.40 ppm
2019-04-17I19173190.500 ppm
2019-04-17I19173216.40 ppm
2019-04-22I19182410.600 ppm
2019-04-22I1918243ND
2019-04-22I1918245ND
2019-04-30I19196631.90 ppm
2019-04-30I1919664ND
2019-04-30I19196672.30 ppm
2019-04-30I19196661.90 ppm
2019-04-30I1919670ND
2019-05-08I19212640.400 ppm
2019-05-08I19212652.30 ppm
2019-05-08I19212621.10 ppm
2019-05-08I1921263ND
2019-05-08I1921261ND
2019-05-29I19251211.10 ppm
2019-05-29I1925123ND
2019-06-11I19276151.30 ppm
2019-06-11I19276180.700 ppm
2019-06-11I1927614ND
2019-06-11I19276191.40 ppm
2019-06-11I19276110.300 ppm
2019-06-11I19276135.40 ppm
2019-06-12I19279731.30 ppm
2019-06-12I19279740.300 ppm
2019-06-12I19279760.200 ppm
2019-06-12I19279781.70 ppm
2019-06-12I1927979ND
2019-06-12I19279720.300 ppm
2019-06-13I19282432.50 ppm
2019-06-20I1929654ND
2019-07-03I19321183.50 ppm
2019-07-03I19321206.70 ppm
2019-07-09I1933025ND
2019-07-09I1933024ND
2019-07-09I1933029ND
2019-07-09I19330260.700 ppm
2019-07-09I19330341.000 ppm
2019-07-09I19330320.700 ppm
2019-07-10I1933348ND
2019-07-10I19333461.10 ppm
2019-07-10I1933345ND
2019-07-10I19333410.700 ppm
2019-07-18I19351500.700 ppm
2019-07-18I19351410.400 ppm
2019-07-18I19351420.500 ppm
2019-07-18I19351430.400 ppm
2019-07-18I19351480.500 ppm
2019-07-18I19351491.10 ppm
2019-07-19I1935265ND
2019-07-19I19352641.40 ppm
2019-07-19I1935267ND
2019-07-19I1935266ND
2019-07-31I19374960.700 ppm
2019-07-31I19374971.000 ppm
2019-08-02I1937930ND
2019-08-05I1938320ND
2019-08-05I19381460.400 ppm
2019-08-05I1938144ND
2019-08-06I1938602ND
2019-08-06I19386030.300 ppm
2019-08-07I19389881.30 ppm
2019-08-07I1938747ND
2019-08-28I19429300.400 ppm
2019-08-28I1942932ND
2019-09-05I19445230.500 ppm
2019-10-09I19510127.10 ppm