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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2013 | N/A | 0 | 0 | N/A |
2014 | 0.303 ppm | 9 | 4 | ND - 1.37 ppm |
2015 | 0.447 ppm | 9 | 4 | ND - 2.56 ppm |
2016 | 0.404 ppm | 7 | 4 | ND - 1.55 ppm |
2017 | 0.0158 ppm | 4 | 1 | ND - 0.0630 ppm |
2018 | 0.286 ppm | 12 | 8 | ND - 1.80 ppm |
2019 | 0.366 ppm | 14 | 8 | ND - 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 |
---|---|---|
2014-02-04 | 1402305-001-PRI | ND |
2014-07-01 | 1407057-001-PRI | ND |
2014-07-24 | 1407H51-001-PRI | ND |
2014-11-05 | 1411261-001-PRI | 1.37 ppm |
2014-11-05 | 1411261-002-PRI | 0.600 ppm |
2014-11-05 | 1411261-003-PRI | ND |
2014-11-18 | 1411C31-001-PRI | 0.290 ppm |
2014-12-02 | 1412141-001-PRI | ND |
2014-12-10 | 1412803-001-PRI | 0.470 ppm |
2015-03-04 | 1503256-001-PRI | ND |
2015-03-17 | 1503B81-003-PRI | 2.56 ppm |
2015-03-17 | 1503B81-001-PRI | ND |
2015-03-17 | 1503B81-005-PRI | ND |
2015-03-24 | 1503G72-001-PRI | ND |
2015-05-27 | 1505J26-001-PRI | 0.400 ppm |
2015-05-27 | 1505J26-004-PRI | ND |
2015-05-27 | 1505J26-003-PRI | 0.890 ppm |
2015-05-27 | 1505J26-002-PRI | 0.170 ppm |
2016-03-15 | 1603C44-002-PRI | 0.220 ppm |
2016-03-15 | 1603C44-001-PRI | 0.670 ppm |
2016-03-15 | 1603C44-003-PRI | 1.55 ppm |
2016-03-15 | 1603C44-004-PRI | ND |
2016-03-29 | 1603N29-002-PRI | ND |
2016-03-29 | 1603N29-001-PRI | 0.390 ppm |
2016-05-03 | 1605157-001-PRI | ND |
2017-05-09 | 7018134001-PRI | ND |
2017-05-09 | 7018134003-PRI | 0.0630 ppm |
2017-05-09 | 7018134002-PRI | ND |
2017-05-09 | 7018134004-PRI | ND |
2018-03-30 | 7046726001-PRI | 0.140 ppm |
2018-04-17 | 7048636001 | 0.0520 ppm |
2018-05-30 | 7053116005-PRI | 0.0820 ppm |
2018-05-30 | 7053116002-PRI | ND |
2018-05-30 | 7053116006-PRI | ND |
2018-05-30 | 7053116003-PRI | 0.180 ppm |
2018-05-30 | 7053116004-PRI | ND |
2018-06-05 | 7053757002-SEC | 1.80 ppm |
2018-06-05 | 7053757003-SEC | 0.700 ppm |
2018-06-05 | 7053757001-SEC | 0.410 ppm |
2018-06-05 | 7053757005-SEC | ND |
2018-11-16 | 7071317001 | 0.0620 ppm |
2019-01-29 | 7077827002-PRI | 0.600 ppm |
2019-01-29 | 7077827001-PRI | 1.70 ppm |
2019-02-05 | 7078466001 | 0.110 ppm |
2019-02-05 | 7078466002 | 0.330 ppm |
2019-03-12 | 7082052001-SEC | ND |
2019-03-12 | 7082052003-SEC | ND |
2019-03-12 | 7082052002-SEC | ND |
2019-03-12 | 7082052001-PRI | ND |
2019-03-19 | 7082762001-SEC | ND |
2019-03-27 | 7083593001-SEC | ND |
2019-04-16 | 7085976004-SEC | 0.0560 ppm |
2019-07-11 | 7097222001-PRI | 1.90 ppm |
2019-12-24 | 70116371001-PRI | 0.1000 ppm |
2019-12-27 | 70116632001-PRI | 0.330 ppm |