Menu

EWG's Tap Water Database — 2021 UPDATE

Donate

Chlorite

City of Flagstaff

Chlorite is a disinfection byproduct resulting from water treatment with chlorine dioxide. Chlorite decreases hemoglobin levels and causes other hematologic effects. Read More.

Chlorite also forms when chlorine dioxide is used as a bleaching agent for textiles, paper pulp, flour and oils, and from the use of chlorine dioxide in food and packaging.� In 2009, California published a public health goal of 50 parts per billion for chlorite in drinking water. California state scientists reported that chlorite causes red blood cell damage, affects sperm and thyroid function, and may alter behavior and neurodevelopment of rat pups exposed in the womb.

Click here to read more about disinfection byproducts.

MORE ABOUT THIS CONTAMINANT

 

159

Samples

0

Samples exceeding legal limit (MCL)

78

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
2014N/A00N/A
201534.7 ppb124ND - 220.0 ppb
201624.1 ppb3915ND - 160.0 ppb
201732.9 ppb3614ND - 260.0 ppb
2018165.7 ppb3632ND - 410.0 ppb
2019201.3 ppb3635ND - 480.0 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 50 ppb

The EWG Health Guideline of 50 ppb for chlorite was defined by the California Office of Environmental Health Hazard Assessment as a public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against change in blood chemistry.

EPA Maximum Contaminant
Level (MCL) 1,000 ppb

ppb = parts per billion

All test results

Date Lab ID Result
2015-07-16201506230785ND
2015-07-1620150623078692.0 ppb
2015-07-16201506230787ND
2015-08-11201508040111ND
2015-08-1120150804011261.0 ppb
2015-08-11201508040113ND
2015-09-15201508090119220.0 ppb
2015-09-1520150809012043.0 ppb
2015-09-15201508090121ND
2015-10-15201509060024ND
2015-10-15201509060025ND
2015-10-15201509060026ND
2016-03-2320160324029444.0 ppb
2016-03-23201603240295ND
2016-03-23201603240296ND
2016-04-13201603020233ND
2016-04-13201603020233ND
2016-04-1320160302023428.0 ppb
2016-04-1320160302023428.0 ppb
2016-04-13201603020235ND
2016-04-13201603020235ND
2016-05-23201604060035ND
2016-05-23201604060035ND
2016-05-2320160406003654.0 ppb
2016-05-2320160406003654.0 ppb
2016-05-23201604060037ND
2016-05-23201604060037ND
2016-06-15201605040004ND
2016-06-15201605040004ND
2016-06-1520160504000518.0 ppb
2016-06-1520160504000518.0 ppb
2016-06-15201605040006ND
2016-06-15201605040006ND
2016-07-13201607150323ND
2016-07-1320160715032421.0 ppb
2016-07-13201607150325ND
2016-08-24201608250578ND
2016-08-24201608250579ND
2016-08-2420160825058074.0 ppb
2016-09-12201609130810160.0 ppb
2016-09-1220160913081173.0 ppb
2016-09-12201609130812ND
2016-10-12201610140422ND
2016-10-12201610140423140.0 ppb
2016-10-12201610140424ND
2016-11-08201611100448130.0 ppb
2016-11-0820161110044975.0 ppb
2016-11-08201611100450ND
2016-12-20201612220238ND
2016-12-20201612220239ND
2016-12-202016122203721.0 ppb
2017-01-17201701180641ND
2017-01-1720170118064223.0 ppb
2017-01-17201701180643ND
2017-02-2120170222085330.0 ppb
2017-02-21201702220854ND
2017-02-21201702220855ND
2017-03-08201703091071ND
2017-03-0820170309107240.0 ppb
2017-03-08201703091073ND
2017-04-1020170411148258.0 ppb
2017-04-10201704111483ND
2017-04-10201704111484ND
2017-05-0820170509132839.0 ppb
2017-05-08201705091329ND
2017-05-08201705091330ND
2017-06-12201706131017ND
2017-06-1220170613101814.0 ppb
2017-06-12201706131019ND
2017-07-10201707120315ND
2017-07-10201707120316ND
2017-07-10201707120317ND
2017-08-07201708080709ND
2017-08-0720170808071058.0 ppb
2017-08-07201708080711ND
2017-09-0520170906123714.0 ppb
2017-09-0520170906123852.0 ppb
2017-09-05201709061239ND
2017-10-23201710240367ND
2017-10-23201710240368ND
2017-10-23201710240369ND
2017-11-14201711150417230.0 ppb
2017-11-14201711150418ND
2017-11-14201711150419230.0 ppb
2017-12-1120171212063155.0 ppb
2017-12-1120171212063280.0 ppb
2017-12-11201712120633260.0 ppb
2018-01-08201801090707120.0 ppb
2018-01-0820180109070835.0 ppb
2018-01-08201801090709200.0 ppb
2018-02-12201802130964ND
2018-02-1220180213096552.0 ppb
2018-02-12201802130966320.0 ppb
2018-03-0520180306040336.0 ppb
2018-03-05201803060404ND
2018-03-0520180306040592.0 ppb
2018-04-09201804100544310.0 ppb
2018-04-09201804100545100.0 ppb
2018-04-09201804100546330.0 ppb
2018-05-0920180511028534.0 ppb
2018-05-09201805110286310.0 ppb
2018-05-09201805110287370.0 ppb
2018-06-04201806050427290.0 ppb
2018-06-0420180605042839.0 ppb
2018-06-04201806050429240.0 ppb
2018-07-10201807120566ND
2018-07-1020180712056794.0 ppb
2018-07-10201807120568250.0 ppb
2018-08-0820180810061499.0 ppb
2018-08-08201808100615270.0 ppb
2018-08-08201808100616370.0 ppb
2018-09-05201809060774410.0 ppb
2018-09-05201809060775130.0 ppb
2018-09-05201809060776150.0 ppb
2018-10-1520181016051744.0 ppb
2018-10-15201810160518160.0 ppb
2018-10-15201810160519190.0 ppb
2018-11-07201811090350ND
2018-11-07201811090351120.0 ppb
2018-11-07201811090352200.0 ppb
2018-12-0320181204088220.0 ppb
2018-12-03201812040883250.0 ppb
2018-12-03201812040884330.0 ppb
2019-01-0920190110063313.0 ppb
2019-01-09201901100634130.0 ppb
2019-01-0920190110063585.0 ppb
2019-02-04201902050542ND
2019-02-04201902050543130.0 ppb
2019-02-0420190205054480.0 ppb
2019-03-04201903050556100.0 ppb
2019-03-0420190305055798.0 ppb
2019-03-04201903050558260.0 ppb
2019-04-03201904040416320.0 ppb
2019-04-03201904040417190.0 ppb
2019-04-03201904040418340.0 ppb
2019-05-08201905090549340.0 ppb
2019-05-08201905090550160.0 ppb
2019-05-08201905090551340.0 ppb
2019-06-05201906060262460.0 ppb
2019-06-05201906060263240.0 ppb
2019-06-05201906060264480.0 ppb
2019-07-0220190703080989.0 ppb
2019-07-02201907030810160.0 ppb
2019-07-02201907030811240.0 ppb
2019-08-0620190807058315.0 ppb
2019-08-06201908070584230.0 ppb
2019-08-06201908070585350.0 ppb
2019-09-0420190905030174.0 ppb
2019-09-0420190905030293.0 ppb
2019-09-04201909050303300.0 ppb
2019-10-0220191030575110.0 ppb
2019-10-0220191030576150.0 ppb
2019-10-0220191030577280.0 ppb
2019-11-062019111071021300.0 ppb
2019-11-062019111071022110.0 ppb
2019-11-062019111071023310.0 ppb
2019-12-11201912120655120.0 ppb
2019-12-11201912120656260.0 ppb
2019-12-11201912120657290.0 ppb