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EWG's Tap Water Database — 2021 UPDATE

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Nitrite

Honolulu-Windward-Pearl Harbor

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.

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316

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
2014ND490ND
2015ND550ND
2016ND500ND
2017ND530ND
2018ND540ND
2019ND550ND

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
2014-04-03201404040384ND
2014-04-03201404040385ND
2014-04-03201404040386ND
2014-04-03201404040387ND
2014-04-03201404040388ND
2014-04-03201404040389ND
2014-04-03201404040390ND
2014-04-03201404040391ND
2014-04-03201404040392ND
2014-04-03201404040393ND
2014-04-03201404040394ND
2014-04-10201404120292ND
2014-04-10201404120293ND
2014-04-10201404120294ND
2014-04-10201404120295ND
2014-04-10201404120296ND
2014-04-17201404180245ND
2014-04-17201404180246ND
2014-04-17201404180247ND
2014-04-17201404180248ND
2014-04-17201404180249ND
2014-04-17201404180250ND
2014-04-17201404180251ND
2014-04-17201404180252ND
2014-04-17201404180253ND
2014-04-17201404180254ND
2014-04-21201404220329ND
2014-04-21201404220330ND
2014-04-21201404220331ND
2014-04-22201404230610ND
2014-04-22201404230611ND
2014-04-22201404230612ND
2014-04-22201404230613ND
2014-04-23201404240254ND
2014-04-23201404240255ND
2014-04-23201404240256ND
2014-04-23201404240257ND
2014-04-24201404250325ND
2014-04-24201404250326ND
2014-04-24201404250327ND
2014-04-24201404250328ND
2014-04-24201404250329ND
2014-04-28201404290638ND
2014-04-28201404290639ND
2014-04-29201404300628ND
2014-04-29201404300629ND
2014-05-07201405080377ND
2014-07-22201407230670ND
2014-08-20201408220169ND
2015-02-10201502110397ND
2015-02-11201502120281ND
2015-04-07201504080450ND
2015-04-07201504080451ND
2015-04-08201504090111ND
2015-04-08201504090112ND
2015-04-13201504140136ND
2015-04-13201504140137ND
2015-04-14201504150251ND
2015-04-15201504160351ND
2015-04-15201504160352ND
2015-04-15201504160358ND
2015-04-15201504160359ND
2015-04-15201504160360ND
2015-04-16201504170065ND
2015-04-16201504170068ND
2015-04-20201504210282ND
2015-04-20201504210283ND
2015-04-21201504220241ND
2015-04-21201504220242ND
2015-04-21201504220243ND
2015-04-21201504220244ND
2015-04-21201504220245ND
2015-04-22201504230303ND
2015-04-22201504230304ND
2015-04-22201504230308ND
2015-04-27201504280099ND
2015-04-27201504280100ND
2015-04-28201504290318ND
2015-04-28201504290319ND
2015-04-28201504290320ND
2015-04-28201504290321ND
2015-04-28201504290322ND
2015-04-28201504290338ND
2015-04-28201504290339ND
2015-04-29201504300056ND
2015-04-29201504300057ND
2015-04-30201505010074ND
2015-05-04201505050069ND
2015-05-05201505060111ND
2015-05-05201505060137ND
2015-05-05201505060141ND
2015-05-05201505060143ND
2015-05-05201505060144ND
2015-05-06201505070239ND
2015-05-06201505070240ND
2015-05-06201505070241ND
2015-05-11201505120636ND
2015-05-11201505120637ND
2015-05-12201505130586ND
2015-05-18201505190239ND
2015-06-09201506100100ND
2015-08-19201508200481ND
2015-10-20201510210174ND
2015-12-29201512300217ND
2016-02-10ND
2016-04-06ND
2016-04-07ND
2016-04-07ND
2016-04-07ND
2016-04-07ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-12ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-14ND
2016-04-18ND
2016-04-18ND
2016-04-18ND
2016-04-19ND
2016-04-19ND
2016-04-20ND
2016-04-20ND
2016-04-21ND
2016-04-21ND
2016-04-21ND
2016-04-21ND
2016-04-25ND
2016-04-26ND
2016-04-26ND
2016-05-03ND
2016-05-04ND
2016-05-04ND
2016-05-04ND
2016-05-05ND
2016-05-16ND
2016-05-16ND
2016-05-16ND
2016-06-20ND
2016-06-20ND
2016-07-07ND
2016-10-31ND
2017-02-14ND
2017-04-04ND
2017-04-04ND
2017-04-05ND
2017-04-05ND
2017-04-12ND
2017-04-12ND
2017-04-12ND
2017-04-12ND
2017-04-18ND
2017-04-18ND
2017-04-19ND
2017-04-19ND
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-20ND
2017-04-27ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-03ND
2017-05-04ND
2017-05-04ND
2017-05-04ND
2017-05-04ND
2017-05-04ND
2017-05-10ND
2017-05-10ND
2017-05-10ND
2017-05-11ND
2017-05-11ND
2017-05-11ND
2017-05-17ND
2017-05-17ND
2017-05-18ND
2017-05-23ND
2017-05-23ND
2017-05-23ND
2017-05-23ND
2017-05-23ND
2017-05-23ND
2017-05-24ND
2017-05-25ND
2017-05-31ND
2017-06-06ND
2017-06-07ND
2017-06-08ND
2017-06-14ND
2017-11-07ND
2018-02-20201802220118ND
2018-03-28201803300306ND
2018-04-04201804050725ND
2018-04-09201804120584ND
2018-04-09201804120585ND
2018-04-09201804120582ND
2018-04-09201804120583ND
2018-04-09201804120587ND
2018-04-09201804120588ND
2018-04-09201804120586ND
2018-04-10201804120580ND
2018-04-10201804120579ND
2018-04-10201804120577ND
2018-04-10201804120578ND
2018-04-10201804120581ND
2018-04-11201804130362ND
2018-04-11201804130402ND
2018-04-11201804130406ND
2018-04-11201804130404ND
2018-04-11201804130403ND
2018-04-11201804130405ND
2018-04-11201804130401ND
2018-04-17201804230043ND
2018-04-17201804230044ND
2018-04-17201804230045ND
2018-04-17201804230042ND
2018-04-17201804181083ND
2018-04-18201804200570ND
2018-04-18201804200567ND
2018-04-18201804200568ND
2018-04-24201804260447ND
2018-04-24201804260441ND
2018-04-24201804260443ND
2018-04-24201804260442ND
2018-04-24201804260444ND
2018-04-24201804260445ND
2018-04-24201804260446ND
2018-04-24201804260440ND
2018-04-24201804260448ND
2018-04-26201804300501ND
2018-05-01201805040145ND
2018-05-01201805040141ND
2018-05-01201805040143ND
2018-05-01201805040142ND
2018-05-01201805040146ND
2018-05-01201805040144ND
2018-05-02201805030714ND
2018-05-02201805030715ND
2018-05-30201805230584ND
2018-06-12201806140372ND
2018-07-25201807260579ND
2018-08-07201808100215ND
2018-09-19201809200606ND
2018-09-19201809200607ND
2019-01-28201901290118ND
2019-03-14201903150346ND
2019-04-01201904020237ND
2019-04-08201904090433ND
2019-04-10201904110139ND
2019-04-10201904110140ND
2019-04-10201904110200ND
2019-04-10201904110138ND
2019-04-10201904110202ND
2019-04-10201904110199ND
2019-04-10201904110201ND
2019-04-10201904110204ND
2019-04-10201904110203ND
2019-04-15201904160128ND
2019-04-15201904160126ND
2019-04-15201904160127ND
2019-04-15201904160125ND
2019-04-16201904170177ND
2019-04-16201904170179ND
2019-04-16201904170178ND
2019-04-16201904170205ND
2019-04-16201904170206ND
2019-04-16201904170182ND
2019-04-16201904170180ND
2019-04-16201904170181ND
2019-04-16201904170176ND
2019-04-16201904170095ND
2019-04-17201904180209ND
2019-04-17201904180210ND
2019-04-17201904180201ND
2019-04-17201904180202ND
2019-04-22201904230220ND
2019-04-24201904250251ND
2019-04-24201904250250ND
2019-04-24201904250248ND
2019-04-24201904250249ND
2019-04-25201904260292ND
2019-04-25201904260293ND
2019-04-29201904300282ND
2019-04-29201904300227ND
2019-04-29201904300283ND
2019-04-29201904300226ND
2019-04-29201904300224ND
2019-04-29201904300225ND
2019-05-01201905020257ND
2019-05-01201905020258ND
2019-05-02201905030133ND
2019-05-02201905030134ND
2019-07-10201907110442ND
2019-09-18201909190159ND
2019-09-18201909190644ND
2019-09-25201909260608ND
2019-10-29201910300461ND
2019-11-19201911200324ND
2019-12-26201912270120ND