Nitrate and nitrite
Manhasset Lakeville WD
Nitrate and nitrite enter water from fertilizer runoff, septic tanks and urban runoff. These contaminants can cause oxygen deprivation for infants and increase the risk of cancer. Nitrite is significantly more toxic than nitrate. Click here to read more about nitrate.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 3.32 ppm | 8 | 8 | 0.270 ppm - 7.44 ppm |
2015 | 5.92 ppm | 5 | 5 | 4.58 ppm - 8.47 ppm |
2016 | 3.93 ppm | 17 | 16 | ND - 7.70 ppm |
2017 | 4.13 ppm | 67 | 65 | ND - 8.80 ppm |
2018 | 3.33 ppm | 67 | 67 | 0.0640 ppm - 6.80 ppm |
2019 | 4.04 ppm | 79 | 79 | 0.00540 ppm - 9.10 ppm |
ppm = parts per million
State and national drinking water standards and health guidelines
EWG Health Guideline 0.14 ppm
The health guideline of 0.14 parts per million, or ppm, for nitrate and nitrite is based on the equivalent health guideline for nitrate, as defined in a peer-reviewed scientific study by EWG. This guideline represents a one-in-one-million annual cancer risk level.
EPA Maximum Contaminant
Level (MCL) 10 ppm
ppm = parts per million
All test results
Date | Lab ID | Result |
---|---|---|
2014-03-12 | 1403769-001-PRI | 0.310 ppm |
2014-04-01 | 1404065-001-PRI | 0.270 ppm |
2014-07-11 | 1407765-001-PRI | 0.270 ppm |
2014-11-20 | 1411E32-003-PRI | 0.810 ppm |
2014-12-29 | 1412J02-003-PRI | 7.20 ppm |
2014-12-29 | 1412J02-004-PRI | 6.96 ppm |
2014-12-29 | 1412J02-002-PRI | 7.44 ppm |
2014-12-30 | 1412J23-001-PRI | 3.26 ppm |
2015-03-17 | 1503B08-005-PRI | 7.10 ppm |
2015-07-30 | 1507L96-010 -NIT | 4.58 ppm |
2015-08-05 | 1508283-002 | 4.73 ppm |
2015-08-05 | 1508283-003 | 4.74 ppm |
2015-08-25 | 1508182-004 | 8.47 ppm |
2016-05-10 | 1609L08-003-PRI | 0.780 ppm |
2016-09-23 | 1609L08-001-PRI | 0.0900 ppm |
2016-09-27 | 1609N63-001-PRI | 5.19 ppm |
2016-09-27 | 1609N63-002 | 5.60 ppm |
2016-10-27 | 703085008-POCS | 5.50 ppm |
2016-10-27 | 703085007 | 5.50 ppm |
2016-10-27 | 703085006 | 5.30 ppm |
2016-10-28 | 703173004 | 4.50 ppm |
2016-10-28 | 703173006 | 2.90 ppm |
2016-11-18 | 704994004 | 7.70 ppm |
2016-11-18 | 704994005 | 4.50 ppm |
2016-11-28 | 705524004 | 5.90 ppm |
2016-11-28 | 705524001 | ND |
2016-12-20 | 707279001 | 0.230 ppm |
2016-12-21 | 707376009 | 5.00 ppm |
2016-12-28 | 707782002-PRI | 2.70 ppm |
2016-12-28 | 707782004 | 5.40 ppm |
2017-01-18 | 709369001 | 2.70 ppm |
2017-01-18 | 709369002 | 2.60 ppm |
2017-01-19 | 709490001 | 0.1000 ppm |
2017-01-20 | 709587002 | 4.60 ppm |
2017-01-20 | 709587005 | ND |
2017-01-23 | 709698006 | 4.00 ppm |
2017-01-23 | 709698005 | 7.50 ppm |
2017-01-30 | 7010155002 | 2.90 ppm |
2017-01-30 | 7010155005 | 1.10 ppm |
2017-01-30 | 7010155002-POCS | 2.90 ppm |
2017-02-24 | 7012029001 | 2.50 ppm |
2017-02-24 | 7012029010 | 2.90 ppm |
2017-02-24 | 7012029007 | 5.90 ppm |
2017-02-24 | 7012029012 | 5.60 ppm |
2017-02-24 | 7012029006 | 5.70 ppm |
2017-02-28 | 7012240008 | 5.20 ppm |
2017-02-28 | 7012240007 | 7.50 ppm |
2017-03-23 | 7014058005 | 2.80 ppm |
2017-03-23 | 7014058002 | 6.00 ppm |
2017-03-24 | 7014138004-POCS | 5.50 ppm |
2017-03-24 | 7014138001 | 2.50 ppm |
2017-03-29 | 7014450004 | 7.60 ppm |
2017-03-29 | 7014450005 | 5.30 ppm |
2017-04-26 | 7016965001 | 0.0940 ppm |
2017-04-26 | 7016965005 | 2.40 ppm |
2017-04-27 | 7017092008 | 5.50 ppm |
2017-04-27 | 7017092006 | 5.40 ppm |
2017-04-27 | 7017092007 | 5.60 ppm |
2017-04-28 | 7017216002 | 2.80 ppm |
2017-04-28 | 707216008 | 8.10 ppm |
2017-04-28 | 7017216009 | 5.00 ppm |
2017-04-28 | 7017216004 | 6.30 ppm |
2017-05-23 | 7019346001 | 2.30 ppm |
2017-05-24 | 7019556001 | 3.60 ppm |
2017-05-24 | 7019556004 | 4.40 ppm |
2017-05-26 | 7019720004 | 4.30 ppm |
2017-05-26 | 7019720005 | 7.30 ppm |
2017-06-28 | 7022673002 | 4.60 ppm |
2017-06-29 | 7022859004 | 7.00 ppm |
2017-06-29 | 7022859005 | 4.50 ppm |
2017-06-30 | 7022895002 | 3.50 ppm |
2017-06-30 | 7022895004 | 5.20 ppm |
2017-07-17 | 7024312001-PRI | 2.50 ppm |
2017-07-18 | 7024470001-PRI | 0.1000 ppm |
2017-07-19 | 7024686001 | 2.30 ppm |
2017-07-21 | 7024932004 | 7.10 ppm |
2017-07-21 | 7024932005 | 4.80 ppm |
2017-07-25 | 7025172001-PRI | 0.670 ppm |
2017-07-27 | 7025461008 | 5.80 ppm |
2017-08-31 | 7028632008 | 5.40 ppm |
2017-08-31 | 7028632002 | 4.60 ppm |
2017-08-31 | 7028632006 | 3.90 ppm |
2017-08-31 | 7028632004 | 4.60 ppm |
2017-08-31 | 7028632003 | 4.60 ppm |
2017-09-27 | 7031210001 | 2.40 ppm |
2017-09-28 | 7031342001 | 4.30 ppm |
2017-09-28 | 7031342005 | ND |
2017-10-19 | 7033406001-POCS | 0.200 ppm |
2017-10-26 | 7034069006-POCS | 4.50 ppm |
2017-10-31 | 7034362002-POCS | 2.90 ppm |
2017-10-31 | 7034362004-POCS | 5.20 ppm |
2017-11-27 | 7036539006 | 5.80 ppm |
2017-11-27 | 7036539003 | 3.10 ppm |
2017-11-28 | 7036659001 | 5.50 ppm |
2017-11-28 | 7036659005 | 8.80 ppm |
2017-12-27 | 7039121004 | 4.30 ppm |
2017-12-27 | 7039121002 | 2.00 ppm |
2018-01-24 | 7041268003-POCS | 3.30 ppm |
2018-01-24 | 7041268005-POCS | 0.1000 ppm |
2018-01-25 | 7041373002-POCS | 4.90 ppm |
2018-01-25 | 7041373007 | 4.40 ppm |
2018-01-25 | 7041373004-POCS | 2.90 ppm |
2018-01-26 | 7041476001-POCS | 0.780 ppm |
2018-01-26 | 7041476002-POCS | 0.200 ppm |
2018-02-09 | 7042538002_POCS | 2.40 ppm |
2018-02-21 | 7043552006 | 3.90 ppm |
2018-02-21 | 7043552005 | 4.10 ppm |
2018-02-21 | 7043552007-POCS | 4.00 ppm |
2018-02-27 | 7043966002 | 2.10 ppm |
2018-02-27 | 7043966004 | 4.70 ppm |
2018-03-27 | 7046393004-POCS | 4.30 ppm |
2018-03-28 | 7046514001 | 2.00 ppm |
2018-03-29 | 7046718004 | 4.40 ppm |
2018-03-29 | 7046718003 | 2.20 ppm |
2018-04-19 | 7048971004 | 6.30 ppm |
2018-04-19 | 7048971002 | 5.70 ppm |
2018-04-19 | 7048971003 | 6.30 ppm |
2018-04-26 | 7049664002-POCS | 3.10 ppm |
2018-04-26 | 7049664004 | 6.30 ppm |
2018-05-22 | 7052423001 | 2.20 ppm |
2018-05-23 | 7052599001 | 3.90 ppm |
2018-05-23 | 7052599005 | 6.80 ppm |
2018-06-12 | 7054535003-POCS | 2.30 ppm |
2018-06-14 | 7054896005 | 3.70 ppm |
2018-06-14 | 7054896007 | 3.80 ppm |
2018-06-14 | 7054896006 | 3.80 ppm |
2018-06-27 | 7056400002 | 3.10 ppm |
2018-06-27 | 7056400004 | 5.40 ppm |
2018-07-17 | 7058542001-POCS | 0.0990 ppm |
2018-07-17 | 7058542003-SEC | 0.770 ppm |
2018-07-18 | 7058642001-POCS | 2.90 ppm |
2018-07-18 | 7058642004-POCS | 5.50 ppm |
2018-07-31 | 7059900006 | 4.40 ppm |
2018-07-31 | 7059900004-POCS | 3.10 ppm |
2018-08-07 | 7060610001-POCS | 2.20 ppm |
2018-08-29 | 7063131004-POCS | 4.10 ppm |
2018-08-29 | 7063131002 | 4.00 ppm |
2018-08-29 | 7063131005-POCS | 0.210 ppm |
2018-08-29 | 7063131003 | 4.60 ppm |
2018-08-30 | 7063322004 | 5.90 ppm |
2018-08-30 | 7063322002 | 3.90 ppm |
2018-09-25 | 7065814005 | 1.80 ppm |
2018-09-27 | 7066136001-POCS | 3.30 ppm |
2018-09-27 | 7066136005 | 4.80 ppm |
2018-10-24 | 7069415003 | 5.50 ppm |
2018-10-24 | 7069415002 | 4.70 ppm |
2018-10-25 | 7069037004-PRI | 2.20 ppm |
2018-10-25 | 7069037003-POCS | 0.0640 ppm |
2018-10-30 | 7069415004-POCS | 4.10 ppm |
2018-10-31 | 7069606004 | 5.20 ppm |
2018-10-31 | 7069606002-POCS | 2.30 ppm |
2018-10-31 | 7069606008 | 2.70 ppm |
2018-11-16 | 7071362004-POCS | 3.90 ppm |
2018-11-21 | 7071731004 | 2.70 ppm |
2018-11-27 | 7072064005 | 4.30 ppm |
2018-11-27 | 7072247001 | 2.70 ppm |
2018-11-27 | 7072064002 | 1.90 ppm |
2018-12-11 | 7073629002-POCS | 3.00 ppm |
2018-12-13 | 73929001-PRI | 0.150 ppm |
2018-12-13 | 7073929006-PRI | 0.620 ppm |
2018-12-13 | 7073929002 | 2.80 ppm |
2018-12-13 | 7073929004 | 4.60 ppm |
2018-12-14 | 7074055004-POCS | 2.10 ppm |
2018-12-18 | 7074281004 | 2.80 ppm |
2019-01-16 | 7076809001 | 0.120 ppm |
2019-01-16 | 7076809002 | 2.20 ppm |
2019-01-23 | 7077406002 | 4.80 ppm |
2019-01-24 | 7077514006 | 0.190 ppm |
2019-01-24 | 7077514002-POCS | 2.50 ppm |
2019-01-24 | 7077514005 | 5.10 ppm |
2019-01-29 | 7077848004 | 3.90 ppm |
2019-01-29 | 7077848005-POCS | 0.710 ppm |
2019-02-21 | 7080319001 | 4.00 ppm |
2019-02-26 | 7080642001 | 2.20 ppm |
2019-02-28 | 7080954009 | 5.40 ppm |
2019-02-28 | 7080954003 | 6.50 ppm |
2019-02-28 | 7080954004 | 6.80 ppm |
2019-02-28 | 7080954002 | 7.70 ppm |
2019-03-14 | 7082388003 | 3.00 ppm |
2019-03-18 | 7082683005 | 4.80 ppm |
2019-03-19 | 7082777005 | 4.70 ppm |
2019-03-19 | 7082777002 | 3.80 ppm |
2019-03-20 | 7082967004 | 7.80 ppm |
2019-03-20 | 7082967005 | 5.50 ppm |
2019-04-16 | 7085917001 | 1.90 ppm |
2019-04-18 | 7086470005 | 4.10 ppm |
2019-04-18 | 7086470003 | 4.30 ppm |
2019-04-18 | 7086470004 | 4.50 ppm |
2019-04-26 | 7087311004 | 5.40 ppm |
2019-04-26 | 7087311001 | 3.90 ppm |
2019-04-30 | 7087555004 | 4.30 ppm |
2019-05-16 | 7089865007-POCS | 4.40 ppm |
2019-05-22 | 7090520005 | 4.30 ppm |
2019-05-22 | 7090520004 | 6.50 ppm |
2019-05-29 | 7091302004 | 3.90 ppm |
2019-05-29 | 7091302001 | 2.20 ppm |
2019-05-29 | 7091302007 | 3.30 ppm |
2019-06-13 | 7093528006 | 4.50 ppm |
2019-06-13 | 7093528001-POCS | 2.30 ppm |
2019-06-13 | 7093528008-POCS | 4.80 ppm |
2019-06-19 | 7094244010 | 4.40 ppm |
2019-06-19 | 7094244004 | 3.30 ppm |
2019-06-19 | 7094244002 | 5.60 ppm |
2019-07-17 | 7097812001 | 0.200 ppm |
2019-07-17 | 7097812002 | 2.50 ppm |
2019-07-19 | 7098205003 | 2.70 ppm |
2019-07-25 | 7098908004 | 9.10 ppm |
2019-07-25 | 7098908005 | 5.70 ppm |
2019-07-26 | 7099088002 | 4.30 ppm |
2019-07-26 | 7099088005 | 6.20 ppm |
2019-07-30 | 7099328003-PRI | 2.90 ppm |
2019-07-30 | 7099328004-PRI | 0.710 ppm |
2019-08-01 | 7099664004-PRI | 4.10 ppm |
2019-08-01 | 7099664001-PRI | 3.40 ppm |
2019-08-02 | 7099786003-PRI | 7.60 ppm |
2019-08-02 | 7099786004-PRI | 3.70 ppm |
2019-08-20 | 70102101001 | 3.00 ppm |
2019-08-21 | 70102180003 | 0.00540 ppm |
2019-08-29 | 70103135002 | 4.20 ppm |
2019-08-29 | 70103135003 | 4.20 ppm |
2019-08-29 | 70103135008 | 3.50 ppm |
2019-08-29 | 70103135004-POCS | 4.20 ppm |
2019-08-29 | 70103135005 | 5.30 ppm |
2019-09-12 | 70104737003-POCS | 7.00 ppm |
2019-09-12 | 70104737006 | 4.60 ppm |
2019-09-27 | 70106586001 | 3.70 ppm |
2019-09-27 | 70106586005 | 5.40 ppm |
2019-10-24 | 70109665004 | 3.80 ppm |
2019-10-29 | 70110021004 | 5.00 ppm |
2019-10-29 | 70110021002 | 3.00 ppm |
2019-10-31 | 70110292005 | 3.90 ppm |
2019-11-14 | 70111925003 | 3.30 ppm |
2019-11-15 | 70112007004 | 5.30 ppm |
2019-11-21 | 70112818005 | 4.80 ppm |
2019-11-21 | 70112818009 | 4.80 ppm |
2019-11-21 | 70112818007 | 2.40 ppm |
2019-12-11 | 70114831003 | 3.60 ppm |
2019-12-11 | 70114831002 | 3.70 ppm |
2019-12-11 | 70114831005 | 2.60 ppm |
2019-12-11 | 70114831006 | 2.60 ppm |
2019-12-17 | 70115597002 | 2.50 ppm |
2019-12-17 | 70115597004 | 5.70 ppm |
2019-12-19 | 70116040005 | 4.40 ppm |