Nitrate

Manhasset Lakeville WD

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

352

Samples

Samples exceeding legal limit (MCL)

333

Samples exceeding
health guidelines

Testing results - average by year

Year	Average result	Samples taken	Detections	Range of results
2014	4.87 ppm	63	63	0.270 ppm - 7.44 ppm
2015	4.83 ppm	37	37	0.740 ppm - 7.45 ppm
2016	3.73 ppm	48	48	0.000200 ppm - 8.18 ppm
2017	3.92 ppm	63	62	ND - 8.80 ppm
2018	3.30 ppm	67	66	ND - 6.80 ppm
2019	3.62 ppm	74	74	0.00250 ppm - 7.70 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
2014-01-29	1401C30-004-POCS	5.40 ppm
2014-01-29	1401C30-006	7.15 ppm
2014-01-30	1401C78-006	6.46 ppm
2014-01-30	1401C78-005	6.61 ppm
2014-01-30	1401C78-007-POCS	6.30 ppm
2014-02-26	1402E34-006	5.25 ppm
2014-02-26	1402E34-005	5.20 ppm
2014-02-26	1402E34-004	5.25 ppm
2014-02-28	1402F83-001	4.29 ppm
2014-02-28	1402F83-004	6.25 ppm
2014-03-12	1403769-001-PRI	0.310 ppm
2014-03-13	1403877-006	5.46 ppm
2014-03-13	1403877-007-POCS	5.50 ppm
2014-03-13	1403877-005	5.48 ppm
2014-03-24	1403G29-001	5.03 ppm
2014-03-24	1403G29-003	5.61 ppm
2014-04-01	1404065-001-PRI	0.270 ppm
2014-04-29	1404K80-002	5.00 ppm
2014-04-29	1404K80-003	5.02 ppm
2014-04-29	1404K80-004-POCS	5.00 ppm
2014-05-22	1405G40-003	5.62 ppm
2014-05-22	1405G40-002-POCS	3.33 ppm
2014-05-28	1405J57-007-POCS	5.19 ppm
2014-05-28	1405J57-006	5.03 ppm
2014-05-28	1405J57-005	5.03 ppm
2014-06-26	1406J68-004-POCS	5.13 ppm
2014-06-26	1406J68-008	5.58 ppm
2014-06-26	1406J68-002	5.20 ppm
2014-06-26	1406J68-003	5.10 ppm
2014-06-26	1406J68-006	3.68 ppm
2014-07-11	1407765-001-PRI	0.270 ppm
2014-07-31	1407L96-009-POCS	4.84 ppm
2014-07-31	1407L96-004	5.43 ppm
2014-07-31	1407L96-002-POCS	3.54 ppm
2014-07-31	1407L96-007	4.80 ppm
2014-07-31	1407L96-008	4.91 ppm
2014-08-27	1408J52-003	4.82 ppm
2014-08-27	1408J52-004	4.82 ppm
2014-08-27	1408J52-005	4.92 ppm
2014-08-28	1408K14-004	5.68 ppm
2014-08-28	1408K14-002	3.51 ppm
2014-09-23	1409H96-008	4.17 ppm
2014-09-30	1409M62-003	4.99 ppm
2014-09-30	1409M62-002	4.90 ppm
2014-09-30	1409M62-008	6.15 ppm
2014-09-30	1409M62-004-POCS	5.04 ppm
2014-09-30	1409M62-006	3.82 ppm
2014-10-29	1410J28-004-POCS	4.71 ppm
2014-10-29	1410J28-002	4.72 ppm
2014-10-29	1410J28-003	4.72 ppm
2014-10-31	1410K78-003	5.93 ppm
2014-10-31	1410K78-001-POCS	3.50 ppm
2014-11-20	1411E32-003-PRI	0.810 ppm
2014-11-25	1411G52-002	5.87 ppm
2014-11-25	1411G52-007	5.58 ppm
2014-11-25	1411G52-004-POCS	5.85 ppm
2014-11-25	1411G52-005	2.97 ppm
2014-11-25	1411G52-003	5.94 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	1412J23-003	4.71 ppm
2014-12-30	1412J23-001-PRI	3.26 ppm
2015-01-30	1501H32-008	6.01 ppm
2015-01-30	1501H32-003	5.02 ppm
2015-01-30	1501H32-004-POCS	5.01 ppm
2015-01-30	1501H32-006-POCS	3.02 ppm
2015-01-30	1501H32-002	4.98 ppm
2015-02-12	1502822-006-POCS	5.02 ppm
2015-02-12	1502822-005	4.99 ppm
2015-02-12	1502822-004	4.89 ppm
2015-02-27	1502H21-005	5.51 ppm
2015-02-27	1502H21-003	2.57 ppm
2015-03-17	1503B08-005-PRI	7.10 ppm
2015-03-31	1503L06-008	3.13 ppm
2015-03-31	1503L06-010	6.09 ppm
2015-03-31	1503L06-007	7.19 ppm
2015-03-31	1503L06-006	7.40 ppm
2015-03-31	1503L06-005	7.45 ppm
2015-04-28	1504K70-002	3.87 ppm
2015-04-28	1504K70-004	6.44 ppm
2015-04-30	1504N03-002	5.22 ppm
2015-04-30	1504N03-003	5.62 ppm
2015-04-30	1504N03-004	6.08 ppm
2015-05-28	1505K14-007-POCS	4.49 ppm
2015-05-28	1505K14-005	4.65 ppm
2015-05-28	1505K14-011	5.40 ppm
2015-05-28	1505K14-006	4.42 ppm
2015-05-28	1505K14-009	3.29 ppm
2015-06-25	1506K40-005	2.92 ppm
2015-06-30	1506N60-008	5.79 ppm
2015-06-30	1506N60-003	4.77 ppm
2015-06-30	1506N60-006	3.87 ppm
2015-06-30	1506N60-004-POCS	4.89 ppm
2015-06-30	1506N60-002	4.77 ppm
2015-07-31	1507N04-002-POCS	3.73 ppm
2015-08-05	1508283-004	4.76 ppm
2015-08-25	1508182-006	0.740 ppm
2015-09-29	1509M28-009-POCS	4.55 ppm
2015-10-30	1510N51-008	3.12 ppm
2016-01-29	1601J79-007	3.83 ppm
2016-01-29	1601J79-009	3.89 ppm
2016-01-29	1601J79-004	5.13 ppm
2016-01-29	1601J79-002	2.74 ppm
2016-02-22	1602F37-002	0.210 ppm
2016-02-29	1602K24-006	4.77 ppm
2016-02-29	1602K24-004	2.77 ppm
2016-03-31	1603P71-005	2.35 ppm
2016-03-31	1603P71-003	2.72 ppm
2016-04-19	1604H74-001	4.56 ppm
2016-04-20	1604J63-010	0.1000 ppm
2016-05-10	1609L08-003-PRI	0.780 ppm
2016-05-19	1605I12-008	4.18 ppm
2016-06-23	1606N95-009	8.18 ppm
2016-06-23	1606N95-005	4.06 ppm
2016-06-24	1606P18-007	4.88 ppm
2016-07-06	1607416-001	5.66 ppm
2016-07-06	1607416-003	3.82 ppm
2016-07-13	1607A82-001	0.700 ppm
2016-07-13	1607A82-002	0.0700 ppm
2016-07-19		4.51 ppm
2016-07-20	1607H37-005	6.45 ppm
2016-07-20	1607H37-001	0.000200 ppm
2016-08-24	1608N09-003	4.00 ppm
2016-08-24	1608N09-008	5.22 ppm
2016-08-24	1608N09-004	4.01 ppm
2016-08-24	1608N09-002	3.76 ppm
2016-08-24	1608N09-006	3.36 ppm
2016-08-26	1608P03-006	4.35 ppm
2016-09-21	1609I85-008	2.80 ppm
2016-09-22	1609J95-001	3.81 ppm
2016-09-22	1609J95-005	5.86 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	703085007	5.50 ppm
2016-10-27	703085008-POCS	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	704994005	4.50 ppm
2016-11-28	705524004	5.90 ppm
2016-11-28	705524001	2.80 ppm
2016-12-20	707279001	0.230 ppm
2016-12-21	707376009	5.00 ppm
2016-12-28	707782010	4.60 ppm
2016-12-28	707782004	5.40 ppm
2016-12-28	707782002-PRI	2.70 ppm
2017-01-18	709369002	2.60 ppm
2017-01-18	709369001	2.70 ppm
2017-01-19	709490001	0.1000 ppm
2017-01-20	709587005	0.210 ppm
2017-01-20	709587002	4.60 ppm
2017-01-23	709698006	4.00 ppm
2017-01-30	7010155002	2.90 ppm
2017-01-30	7010155002-POCS	2.90 ppm
2017-01-30	7010155005	1.10 ppm
2017-02-24	7012029001	2.50 ppm
2017-02-24	7012029006	5.70 ppm
2017-02-24	7012029007	5.90 ppm
2017-02-24	7012029012	5.60 ppm
2017-02-24	7012029010	2.90 ppm
2017-02-28	7012240007	7.50 ppm
2017-02-28	7012240008	5.20 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	7014450005	5.30 ppm
2017-04-26	7016965005	2.40 ppm
2017-04-26	7016965001	0.0940 ppm
2017-04-27	7017092007	5.60 ppm
2017-04-27	7017092008	5.50 ppm
2017-04-27	7017092006	5.40 ppm
2017-04-28	707216008	8.10 ppm
2017-04-28	7017216009	5.00 ppm
2017-04-28	7017216004	6.30 ppm
2017-04-28	7017216002	2.80 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
2017-06-28	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	7024932005	4.80 ppm
2017-07-25	7025172001-PRI	0.670 ppm
2017-07-27	7025461008	5.80 ppm
2017-08-31	7028632004	4.60 ppm
2017-08-31	7028632006	3.90 ppm
2017-08-31	7028632008	5.40 ppm
2017-08-31	7028632003	4.50 ppm
2017-08-31	7028632002	4.60 ppm
2017-09-27	7031210001	2.40 ppm
2017-09-28	7031342005	ND
2017-09-28	7031342001	4.30 ppm
2017-10-19	7033406001-POCS	0.200 ppm
2017-10-26	7034069006-POCS	4.50 ppm
2017-10-31	7034362004-POCS	5.20 ppm
2017-10-31	7034362002-POCS	2.90 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	7041268005-POCS	0.1000 ppm
2018-01-24	7041268003-POCS	3.30 ppm
2018-01-25	7041373007	4.40 ppm
2018-01-25	7041373004-POCS	2.90 ppm
2018-01-25	7041373002-POCS	4.90 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	7043552007-POCS	4.00 ppm
2018-02-21	7043552005	4.10 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	7048971003	6.30 ppm
2018-04-19	7048971002	5.70 ppm
2018-04-19	7048971004	6.30 ppm
2018-04-26	7049664004	6.30 ppm
2018-04-26	7049664002-POCS	3.10 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	7056400004	5.40 ppm
2018-06-27	7056400002	3.10 ppm
2018-07-17	7058542001-POCS	0.0990 ppm
2018-07-17	7058542003-SEC	0.770 ppm
2018-07-18	7058642004-POCS	5.50 ppm
2018-07-18	7058642001-POCS	2.90 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	7063131005-POCS	0.000210 ppm
2018-08-29	7063131003	4.60 ppm
2018-08-29	7063131004-POCS	4.10 ppm
2018-08-29	7063131002	4.00 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	7066136005	4.80 ppm
2018-09-27	7066136001-POCS	3.30 ppm
2018-10-24	7069415002	4.70 ppm
2018-10-24	7069415003	5.50 ppm
2018-10-25	7069037003-POCS	0.0640 ppm
2018-10-25	7069037004-PRI	2.20 ppm
2018-10-30	7069415004-POCS	4.10 ppm
2018-10-31	7069606008	2.70 ppm
2018-10-31	7069606004	5.20 ppm
2018-10-31	7069606002-POCS	2.30 ppm
2018-11-16	7071362004-POCS	3.90 ppm
2018-11-21	7071731004	2.70 ppm
2018-11-27	7072247001	2.70 ppm
2018-11-27	7072064005	4.30 ppm
2018-11-27	7072064002	1.90 ppm
2018-12-11	7073629002-POCS	3.00 ppm
2018-12-13	7073929002	2.80 ppm
2018-12-13	7073929004	4.60 ppm
2018-12-13	7073929006-PRI	0.620 ppm
2018-12-13	73929001-PRI	0.150 ppm
2018-12-14	7074055004-POCS	ND
2018-12-18	7074281004	2.70 ppm
2019-01-16	7076809001	0.120 ppm
2019-01-16	7076809002	2.10 ppm
2019-01-23	7077406002	4.80 ppm
2019-01-24	7077514002-POCS	0.00250 ppm
2019-01-24	7077514005	5.10 ppm
2019-01-24	7077514006	0.190 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	7080954003	6.50 ppm
2019-02-28	7080954009	5.40 ppm
2019-02-28	7080954002	7.70 ppm
2019-02-28	7080954004	6.80 ppm
2019-03-14	7082388003	3.00 ppm
2019-03-18	7082683005	4.80 ppm
2019-03-19	7082777002	3.80 ppm
2019-03-19	7082777005	4.70 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	7086470004	4.50 ppm
2019-04-18	7086470003	4.30 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
2019-05-29	7091302004	3.90 ppm
2019-05-29	7091302007	3.30 ppm
2019-05-29	7091302001	2.20 ppm
2019-06-13	7093528006	4.50 ppm
2019-06-13	7093528008-POCS	4.80 ppm
2019-06-13	7093528001-POCS	2.30 ppm
2019-06-19	7094244004	3.30 ppm
2019-06-19	7094244010	4.40 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	7098908005	5.70 ppm
2019-07-26	7099088005	6.20 ppm
2019-07-26	7099088002	4.30 ppm
2019-07-30	7099328003-PRI	2.90 ppm
2019-07-30	7099328004-PRI	0.710 ppm
2019-08-01	7099664001-PRI	3.40 ppm
2019-08-01	7099664004-PRI	4.10 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	70103135004-POCS	4.20 ppm
2019-08-29	70103135002	4.20 ppm
2019-08-29	70103135005	0.00530 ppm
2019-08-29	70103135003	4.20 ppm
2019-08-29	70103135008	3.50 ppm
2019-09-12	70104737006	4.60 ppm
2019-09-27	70106586005	5.40 ppm
2019-09-27	70106586001	3.70 ppm
2019-10-24	70109665004	3.80 ppm
2019-10-29	70110021002	3.00 ppm
2019-10-29	70110021004	5.00 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	70112818009	4.80 ppm
2019-11-21	70112818005	4.80 ppm
2019-11-21	70112818007	2.40 ppm
2019-12-11	70114831006	0.00260 ppm
2019-12-11	70114831003	3.60 ppm
2019-12-11	70114831002	3.70 ppm
2019-12-11	70114831005	0.00250 ppm
2019-12-17	70115597004	5.70 ppm
2019-12-17	70115597002	2.50 ppm
2019-12-19	70116040005	4.40 ppm