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EWG's Tap Water Database — 2021 UPDATE

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Nitrate and nitrite

Westbury 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.

MORE ABOUT THIS CONTAMINANT

 

294

Samples

3

Samples exceeding legal limit (MCL)

161

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20144.86 ppm1110ND - 8.72 ppm
20155.61 ppm1110ND - 14.5 ppm
20165.69 ppm2422ND - 9.09 ppm
20173.36 ppm7944ND - 8.60 ppm
20182.18 ppm6927ND - 8.60 ppm
20193.53 ppm10052ND - 11.6 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
2014-05-291405K20-006-PRI8.72 ppm
2014-05-291405K20-009-PRI2.60 ppm
2014-05-291405K20-008-PRI5.46 ppm
2014-05-291405K20-011-PRI6.35 ppm
2014-05-291405K20-001-PRI7.49 ppm
2014-05-291405K20-010-PRI4.35 ppm
2014-05-291405K20-003-PRIND
2014-05-291405K20-005-PRI5.25 ppm
2014-05-291405K20-002-PRI6.92 ppm
2014-05-291405K20-004-PRI4.49 ppm
2014-05-291405K20-007-PRI1.78 ppm
2015-05-261505H81-003-PRI6.83 ppm
2015-05-261505H81-0044.88 ppm
2015-05-261505H81-009-PRI2.64 ppm
2015-05-261505H81-001-PRI6.70 ppm
2015-05-261505H81-006-PRI6.66 ppm
2015-05-261505H81-002-PRI6.76 ppm
2015-05-261505H81-007-PRI2.46 ppm
2015-05-261505H81-010-PRI4.53 ppm
2015-05-261505H81-008-PRI5.78 ppm
2015-05-261505H81-005-PRI14.5 ppm
2015-06-091506715-001-PRIND
2016-05-231605K37-003-PRIND
2016-05-231605K34-001-PRI4.39 ppm
2016-05-231605K37-002-PRI6.30 ppm
2016-05-231605K37-007-PRI3.03 ppm
2016-05-231605K37-001-PRI6.61 ppm
2016-05-231605K37-009-PRI3.21 ppm
2016-05-231605K37-006-PRI9.09 ppm
2016-05-231605K37-005-PRI5.30 ppm
2016-05-231605K37-008-PRI8.42 ppm
2016-05-231605K37-004-PRI5.03 ppm
2016-05-231605K35-001-PRIND
2016-05-231605K35-002-PRI6.91 ppm
2016-11-147044950074.00 ppm
2016-11-147044950035.80 ppm
2016-11-147044950065.70 ppm
2016-11-147044950054.90 ppm
2016-11-147044950015.40 ppm
2016-11-147044950047.40 ppm
2016-11-147044950025.80 ppm
2016-12-127065750027.70 ppm
2016-12-127065750037.00 ppm
2016-12-127065750058.60 ppm
2016-12-127065750048.80 ppm
2016-12-127065750017.10 ppm
2017-01-097086410020.00680 ppm
2017-01-097086410036.70 ppm
2017-01-097086410017.00 ppm
2017-01-097086410058.40 ppm
2017-01-097086410048.30 ppm
2017-02-137011146004ND
2017-02-137011146005ND
2017-02-137011146006ND
2017-02-137011146007ND
2017-02-137011146001ND
2017-02-137011146002ND
2017-02-137011146003ND
2017-03-1370132680046.90 ppm
2017-03-1370132680057.90 ppm
2017-03-1370132680026.40 ppm
2017-03-1370132680037.90 ppm
2017-03-1370132680066.80 ppm
2017-05-0870180050047.90 ppm
2017-05-0870180050036.30 ppm
2017-05-0870180050027.40 ppm
2017-05-0870180050016.30 ppm
2017-05-0870180050057.20 ppm
2017-05-227019227002-PRI5.80 ppm
2017-05-227019227003-PRI6.80 ppm
2017-05-227019227005-PRI4.40 ppm
2017-05-227019227004-PRIND
2017-05-227019227001-PRI6.30 ppm
2017-05-3170199600036.00 ppm
2017-05-3170199600014.60 ppm
2017-05-3170199600027.80 ppm
2017-06-1270210230044.60 ppm
2017-06-1270210230077.50 ppm
2017-06-1270210230016.10 ppm
2017-06-1270210230066.20 ppm
2017-06-1270210230058.60 ppm
2017-06-1270210230027.30 ppm
2017-06-1270210230037.40 ppm
2017-07-1070235330036.10 ppm
2017-07-1029028566.00 ppm
2017-07-1070235330026.30 ppm
2017-07-1070235330045.70 ppm
2017-07-1870244440036.10 ppm
2017-07-187024440014.60 ppm
2017-07-1870244440020.00850 ppm
2017-08-1570272500057.90 ppm
2017-08-1570272500093.70 ppm
2017-08-1570272500025.80 ppm
2017-08-15702725000044.30 ppm
2017-08-1570272500086.90 ppm
2017-08-1570272500010.00560 ppm
2017-08-1570272500065.60 ppm
2017-08-1570272500035.70 ppm
2017-09-117029458006-NITND
2017-09-117029458004-NITND
2017-09-117029458002-NITND
2017-09-117029458007-NITND
2017-09-117029458001-NITND
2017-09-117029458003-NITND
2017-09-117029458005-NITND
2017-10-107032353007-NITND
2017-10-107032353004-NITND
2017-10-107032353001-NITND
2017-10-107032353003-NITND
2017-10-107032353002-NITND
2017-10-107032353006-NITND
2017-10-107032353005-NITND
2017-11-137035531007-NITND
2017-11-137035531003-NITND
2017-11-137035531004-NITND
2017-11-137035531005-NITND
2017-11-137035531008-NITND
2017-11-137035531002-NITND
2017-11-137035531001-NITND
2017-11-137035531006-NITND
2017-11-137035531009-NITND
2017-12-117037755004-NITND
2017-12-117037755001-NITND
2017-12-117037755003-NITND
2017-12-117037755002-NITND
2018-01-127040244001-NITND
2018-02-1270426500083.60 ppm
2018-02-1270426500034.00 ppm
2018-02-1270426500047.60 ppm
2018-02-1270426500055.70 ppm
2018-02-1270426500065.00 ppm
2018-02-1270426500075.00 ppm
2018-02-1270426500027.60 ppm
2018-02-1270426500012.80 ppm
2018-03-1270450740014.30 ppm
2018-03-1270450740033.10 ppm
2018-03-1270450740061.70 ppm
2018-03-1270450740025.60 ppm
2018-03-1270450740046.10 ppm
2018-03-1270450740050.00530 ppm
2018-04-0970476440056.10 ppm
2018-04-0970476440028.60 ppm
2018-04-0970476440067.30 ppm
2018-04-0970476440048.00 ppm
2018-04-0970476440015.70 ppm
2018-04-0970476440034.20 ppm
2018-06-1170544470044.50 ppm
2018-06-1170544470016.00 ppm
2018-06-1170544470077.50 ppm
2018-06-1170544470027.80 ppm
2018-06-1170544470058.50 ppm
2018-06-1170544470037.00 ppm
2018-06-1170544470066.90 ppm
2018-07-097057425006-NITND
2018-07-097057425002-NITND
2018-07-097057425007-NITND
2018-07-097057425003-NITND
2018-07-097057425001-NITND
2018-07-097057425004-NITND
2018-07-097057425005-NITND
2018-08-137061296008-NITND
2018-08-137061296009-NITND
2018-08-137061296003-NITND
2018-08-137061296001-NITND
2018-08-137061296004-NITND
2018-08-137061296005-NITND
2018-08-137061296002-NITND
2018-08-137061296006-NITND
2018-08-137061296007-NITND
2018-09-047063490003ND
2018-09-047063490002ND
2018-09-107064153006ND
2018-09-107064153003-NITND
2018-09-107064153007ND
2018-09-107064153001ND
2018-09-107064153002ND
2018-09-107064153005ND
2018-09-107064153004ND
2018-09-107064153003ND
2018-11-137070821005ND
2018-11-137070821007ND
2018-11-137070821003ND
2018-11-137070821008ND
2018-11-137070821006ND
2018-11-137070821001ND
2018-11-137070821002ND
2018-11-137070821004ND
2018-12-107073376005ND
2018-12-107073376004ND
2018-12-107073376006ND
2018-12-107073376007ND
2018-12-107073376003ND
2018-12-107073376001ND
2018-12-107073376002ND
2019-01-147076468001ND
2019-01-147076468002ND
2019-01-147076468005ND
2019-01-147076468004ND
2019-01-147076468007ND
2019-01-147076468006ND
2019-01-147076468003ND
2019-02-0570784090035.00 ppm
2019-02-0570784090059.50 ppm
2019-02-0570784090015.60 ppm
2019-02-057078409008ND
2019-02-057078409007ND
2019-02-057078409009ND
2019-02-0570784090044.30 ppm
2019-02-0570784090026.30 ppm
2019-02-0570784090067.00 ppm
2019-03-1170819380016.90 ppm
2019-03-11708193800210.6 ppm
2019-03-1170819380038.50 ppm
2019-03-11708193800410.00 ppm
2019-03-1370822810018.70 ppm
2019-03-2870837620028.60 ppm
2019-03-2870837620016.60 ppm
2019-03-2870837620037.30 ppm
2019-04-0870849120029.30 ppm
2019-04-0870849120016.40 ppm
2019-04-08708491200511.6 ppm
2019-04-0870849120068.90 ppm
2019-04-0870849120038.40 ppm
2019-04-0870849120077.60 ppm
2019-04-0870849120045.70 ppm
2019-05-1370892030035.30 ppm
2019-05-1370892030074.10 ppm
2019-05-1370892030065.50 ppm
2019-05-1370892030044.20 ppm
2019-05-1370892030026.00 ppm
2019-05-1370892030015.40 ppm
2019-05-1370892030057.00 ppm
2019-06-047091927008-PRI2.60 ppm
2019-06-047091927006-PRI8.90 ppm
2019-06-0470919270010-PRI3.70 ppm
2019-06-047091927001-PRI7.00 ppm
2019-06-047091927011-PRI4.70 ppm
2019-06-047091927003-PRI6.30 ppm
2019-06-047091927007-PRI8.60 ppm
2019-06-047091927002-PRI6.70 ppm
2019-06-047091927005-PRI5.90 ppm
2019-06-047091927009-PRI6.20 ppm
2019-06-047091927004-PRI5.00 ppm
2019-06-1070928660017.30 ppm
2019-06-1070928660058.50 ppm
2019-06-1070928660034.40 ppm
2019-06-1070928660044.50 ppm
2019-06-1070928660026.20 ppm
2019-06-1070928660076.40 ppm
2019-07-0870965910059.80 ppm
2019-07-0870965910028.20 ppm
2019-07-0870965910045.00 ppm
2019-07-0870965910076.50 ppm
2019-07-0870965910066.70 ppm
2019-07-0870965910036.80 ppm
2019-07-0870965910016.60 ppm
2019-08-0870100529001ND
2019-08-0870100529002ND
2019-08-1370101053005ND
2019-08-1370101053002ND
2019-08-1370101053004ND
2019-08-1370101053003ND
2019-08-1370101053006ND
2019-08-1370101053001ND
2019-08-1570101480002ND
2019-08-157010148000ND
2019-08-1570101480003ND
2019-08-1570101480004ND
2019-09-0970104128002ND
2019-09-0970104128003ND
2019-09-0970104128005ND
2019-09-0970104128006ND
2019-09-0970104128001ND
2019-09-0970104128004ND
2019-09-2670106422001ND
2019-09-2670106422002ND
2019-10-2270109293004ND
2019-10-2270109293005ND
2019-10-2270109293003ND
2019-10-2270109293008ND
2019-10-2270109293009ND
2019-10-2270109293006ND
2019-10-2270109293001ND
2019-10-2270109293002ND
2019-11-1270111548005ND
2019-11-1270111548008ND
2019-11-1270111548003ND
2019-11-1270111548004ND
2019-11-1270111548001ND
2019-11-1270111548006ND
2019-11-1270111548007ND
2019-11-1270111548010ND
2019-11-1270111548011ND
2019-11-127011548002ND