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EWG's Tap Water Database — 2021 UPDATE

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Nitrate

Hempstead

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

 

55

Samples

0

Samples exceeding legal limit (MCL)

21

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20140.303 ppm94ND - 1.37 ppm
20150.447 ppm94ND - 2.56 ppm
20160.404 ppm74ND - 1.55 ppm
20170.0158 ppm41ND - 0.0630 ppm
20180.286 ppm128ND - 1.80 ppm
20190.366 ppm148ND - 1.90 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
2014-02-041402305-001-PRIND
2014-07-011407057-001-PRIND
2014-07-241407H51-001-PRIND
2014-11-051411261-001-PRI1.37 ppm
2014-11-051411261-002-PRI0.600 ppm
2014-11-051411261-003-PRIND
2014-11-181411C31-001-PRI0.290 ppm
2014-12-021412141-001-PRIND
2014-12-101412803-001-PRI0.470 ppm
2015-03-041503256-001-PRIND
2015-03-171503B81-003-PRI2.56 ppm
2015-03-171503B81-001-PRIND
2015-03-171503B81-005-PRIND
2015-03-241503G72-001-PRIND
2015-05-271505J26-001-PRI0.400 ppm
2015-05-271505J26-004-PRIND
2015-05-271505J26-003-PRI0.890 ppm
2015-05-271505J26-002-PRI0.170 ppm
2016-03-151603C44-002-PRI0.220 ppm
2016-03-151603C44-001-PRI0.670 ppm
2016-03-151603C44-003-PRI1.55 ppm
2016-03-151603C44-004-PRIND
2016-03-291603N29-002-PRIND
2016-03-291603N29-001-PRI0.390 ppm
2016-05-031605157-001-PRIND
2017-05-097018134001-PRIND
2017-05-097018134003-PRI0.0630 ppm
2017-05-097018134002-PRIND
2017-05-097018134004-PRIND
2018-03-307046726001-PRI0.140 ppm
2018-04-1770486360010.0520 ppm
2018-05-307053116005-PRI0.0820 ppm
2018-05-307053116002-PRIND
2018-05-307053116006-PRIND
2018-05-307053116003-PRI0.180 ppm
2018-05-307053116004-PRIND
2018-06-057053757002-SEC1.80 ppm
2018-06-057053757003-SEC0.700 ppm
2018-06-057053757001-SEC0.410 ppm
2018-06-057053757005-SECND
2018-11-1670713170010.0620 ppm
2019-01-297077827002-PRI0.600 ppm
2019-01-297077827001-PRI1.70 ppm
2019-02-0570784660010.110 ppm
2019-02-0570784660020.330 ppm
2019-03-127082052001-SECND
2019-03-127082052003-SECND
2019-03-127082052002-SECND
2019-03-127082052001-PRIND
2019-03-197082762001-SECND
2019-03-277083593001-SECND
2019-04-167085976004-SEC0.0560 ppm
2019-07-117097222001-PRI1.90 ppm
2019-12-2470116371001-PRI0.1000 ppm
2019-12-2770116632001-PRI0.330 ppm