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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Waipahu-Ewa-Waianae

Nitrite, closely related to the fertilizer chemical nitrate, comes from urban runoff and from fertilizer applied to agricultural lands to pollute drinking water. Nitrite is significantly more toxic than nitrate. Excessive nitrite in water can cause oxygen deprivation in infants and increase the risk of cancer.

MORE ABOUT THIS CONTAMINANT

 

241

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014ND380ND
2015ND380ND
2016ND420ND
2017ND430ND
2018ND420ND
2019ND380ND

ppm = parts per million

State and national drinking water standards and health guidelines

EPA Maximum Contaminant
Level (MCL) 1 ppm

The legal limit for nitrite, established in 1991, was based on the rate of conversion of ingested nitrate into nitrite in adults. This limit may not fully protect against the risk of cancer due to nitrite exposure.

ppm = parts per million

All test results

Date Lab ID Result
2014-01-14201401150665ND
2014-01-15201401160422ND
2014-01-15201401170496ND
2014-01-15201401170497ND
2014-01-20201401210130ND
2014-01-20201401210131ND
2014-01-20201401210132ND
2014-01-20201401210133ND
2014-01-21201401230462ND
2014-01-21201401230464ND
2014-01-21201401230465ND
2014-01-22201401240241ND
2014-01-23201401240142ND
2014-01-23201401270017ND
2014-01-27201401280408ND
2014-01-27201401280414ND
2014-01-27201401280415ND
2014-01-27201401280416ND
2014-01-27201401280417ND
2014-01-27201401280434ND
2014-01-29201401310163ND
2014-01-30201402010004ND
2014-02-18201402200354ND
2014-03-06201403100107ND
2014-04-10201404120288ND
2014-04-10201404120289ND
2014-04-10201404120290ND
2014-04-10201404120291ND
2014-04-10201404120297ND
2014-07-17201407180279ND
2014-07-17201407180280ND
2014-07-17201407180281ND
2014-07-17201407180282ND
2014-07-24201407250227ND
2014-07-24201407280043ND
2014-10-08201410090462ND
2014-10-08201410090463ND
2014-10-08201410090464ND
2015-01-14201501150366ND
2015-01-14201501150367ND
2015-01-15201501160297ND
2015-01-15201501160298ND
2015-01-21201501220326ND
2015-01-21201501220328ND
2015-01-21201501220329ND
2015-01-22201501230402ND
2015-01-22201501230403ND
2015-01-22201501230404ND
2015-01-26201501270094ND
2015-01-26201501270095ND
2015-01-26201501270096ND
2015-01-27201501280451ND
2015-01-28201501290129ND
2015-01-28201501290130ND
2015-02-03201502040115ND
2015-02-03201502040116ND
2015-02-10201502110403ND
2015-02-10201502110404ND
2015-03-09201503100474ND
2015-04-01201504020269ND
2015-04-02201504030207ND
2015-04-02201504030208ND
2015-04-09201504100170ND
2015-05-12201505130559ND
2015-07-09201507100121ND
2015-07-09201507100122ND
2015-07-09201507100123ND
2015-07-14201507150501ND
2015-09-01201509020196ND
2015-09-01201509020197ND
2015-09-30201510010226ND
2015-10-08201510090221ND
2015-10-08201510090222ND
2015-11-16201511180214ND
2015-11-16201511180215ND
2015-12-29201512300218ND
2016-01-11ND
2016-01-11ND
2016-01-11ND
2016-01-12ND
2016-01-12ND
2016-01-12ND
2016-01-13ND
2016-01-13ND
2016-01-13ND
2016-01-14ND
2016-01-14ND
2016-01-14ND
2016-01-14ND
2016-01-14ND
2016-01-21ND
2016-01-25ND
2016-01-25ND
2016-01-25ND
2016-01-26ND
2016-01-26ND
2016-01-26ND
2016-03-08ND
2016-04-07ND
2016-04-07ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-05-25ND
2016-07-07ND
2016-07-07ND
2016-07-07ND
2016-07-14ND
2016-07-14ND
2016-07-18ND
2016-10-05ND
2016-10-05ND
2016-10-06ND
2016-10-06ND
2016-10-13ND
2016-10-13ND
2016-11-15ND
2016-12-14ND
2017-01-09ND
2017-01-10ND
2017-01-11ND
2017-01-11ND
2017-01-11ND
2017-01-12ND
2017-01-24ND
2017-01-24ND
2017-01-24ND
2017-01-25ND
2017-01-25ND
2017-01-26ND
2017-02-02ND
2017-02-09ND
2017-02-13ND
2017-02-14ND
2017-02-16ND
2017-02-16ND
2017-02-21ND
2017-02-22ND
2017-02-22ND
2017-02-23ND
2017-02-27ND
2017-03-14ND
2017-03-15ND
2017-04-19ND
2017-04-19ND
2017-04-24ND
2017-04-24ND
2017-04-25ND
2017-04-26ND
2017-07-06ND
2017-07-06ND
2017-07-20ND
2017-07-25ND
2017-07-25ND
2017-07-26ND
2017-10-25ND
2017-10-25ND
2017-10-25ND
2017-10-30ND
2017-10-30ND
2017-11-02ND
2018-01-18201801190621ND
2018-01-18201801190622ND
2018-01-18201801190620ND
2018-01-22201712280247ND
2018-01-22201801230704ND
2018-01-22201712280246ND
2018-01-22201801230705ND
2018-01-22201801230703ND
2018-01-23201801260057ND
2018-01-23201801260056ND
2018-01-24201712280233ND
2018-01-24201712280251ND
2018-01-25201712280229ND
2018-01-25201712280234ND
2018-01-30201801310816ND
2018-01-30201801310817ND
2018-01-30201802010055ND
2018-01-31201712280242ND
2018-01-31201712280243ND
2018-02-06201802080158ND
2018-02-14201712280241ND
2018-04-12201804160591ND
2018-04-12201804160589ND
2018-04-16201804170926ND
2018-04-26201804300502ND
2018-04-30201805010802ND
2018-04-30201805010801ND
2018-08-13201808140276ND
2018-08-13201808140275ND
2018-08-14201808160605ND
2018-08-14201808160604ND
2018-08-15201808200087ND
2018-08-21201808230152ND
2018-09-18201809190538ND
2018-10-17201810180496ND
2018-10-18201810190428ND
2018-10-18201810190427ND
2018-10-30201810310332ND
2018-11-07201811080804ND
2018-11-07201811080801ND
2018-11-08201811090580ND
2018-12-04201812050686ND
2019-01-24201901250058ND
2019-01-24201901250060ND
2019-01-24201901250061ND
2019-01-24201901250057ND
2019-01-24201901250059ND
2019-01-28201901290128ND
2019-01-28201901290129ND
2019-01-28201901290127ND
2019-01-30201901310262ND
2019-01-30201901310263ND
2019-01-31201902010248ND
2019-01-31201902010250ND
2019-01-31201902010247ND
2019-01-31201902010249ND
2019-02-05201902060812ND
2019-02-05201902060800ND
2019-02-05201902060799ND
2019-02-05201902060813ND
2019-02-07201902080701ND
2019-02-13201902130365ND
2019-02-28201903010158ND
2019-04-04201904050239ND
2019-04-15201904160218ND
2019-04-15201904160219ND
2019-04-15201904160220ND
2019-04-17201904180188ND
2019-07-09201907100455ND
2019-07-09201907100452ND
2019-07-30201907310316ND
2019-08-19201908200620ND
2019-08-20201906200207ND
2019-09-10201909110307ND
2019-09-10201909110323ND
2019-10-10201909170642ND
2019-10-15201909170648ND
2019-10-15201909170650ND
2019-10-15201909170643ND
2019-10-22201910230612ND