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EWG's Tap Water Database — 2021 UPDATE

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Chlorite

Lacygne, City of

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

 

146

Samples

0

Samples exceeding legal limit (MCL)

59

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201474.7 ppb3627ND - 160.0 ppb
201579.2 ppb3630ND - 180.0 ppb
20165.28 ppb363ND - 70.0 ppb
2017ND150ND
201869.2 ppb123ND - 290.0 ppb
201957.3 ppb113ND - 240.0 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
2014-01-07JAN-2014-CHLOR-A100.0 ppb
2014-01-07JAN-2014-CHLOR-M110.0 ppb
2014-01-07JAN-2014-CHLOR-N110.0 ppb
2014-02-10FEB-2014-CHLOR-A160.0 ppb
2014-02-10FEB-2014-CHLOR-M160.0 ppb
2014-02-10FEB-2014-CHLOR-N160.0 ppb
2014-03-05MAR-2014-CHLOR-A120.0 ppb
2014-03-05MAR-2014-CHLOR-M110.0 ppb
2014-03-05MAR-2014-CHLOR-N110.0 ppb
2014-04-14APR-2014-CHLOR-A90.0 ppb
2014-04-14APR-2014-CHLOR-M120.0 ppb
2014-04-14APR-2014-CHLOR-N100.0 ppb
2014-05-12MAY-2014-CHLOR-A50.0 ppb
2014-05-12MAY-2014-CHLOR-M50.0 ppb
2014-05-12MAY-2014-CHLOR-N50.0 ppb
2014-06-09JUN-2014-CHLOR-A60.0 ppb
2014-06-09JUN-2014-CHLOR-M50.0 ppb
2014-06-09JUN-2014-CHLOR-N60.0 ppb
2014-07-09JUL-2014-CHLOR-AND
2014-07-09JUL-2014-CHLOR-MND
2014-07-09JUL-2014-CHLOR-NND
2014-08-11AUG-2014-CHLOR-AND
2014-08-11AUG-2014-CHLOR-MND
2014-08-11AUG-2014-CHLOR-NND
2014-09-15SEP-2014-CHLOR-A90.0 ppb
2014-09-15SEP-2014-CHLOR-M90.0 ppb
2014-09-15SEP-2014-CHLOR-N90.0 ppb
2014-10-13OCT-2014-CHLOR-A70.0 ppb
2014-10-13OCT-2014-CHLOR-M110.0 ppb
2014-10-13OCT-2014-CHLOR-N120.0 ppb
2014-11-10NOV-2014-CHLOR-AND
2014-11-10NOV-2014-CHLOR-MND
2014-11-10NOV-2014-CHLOR-NND
2014-12-08DEC-2014-CHLOR-A120.0 ppb
2014-12-08DEC-2014-CHLOR-M110.0 ppb
2014-12-08DEC-2014-CHLOR-N120.0 ppb
2015-01-12JAN-2015-CHLOR-A140.0 ppb
2015-01-12JAN-2015-CHLOR-M140.0 ppb
2015-01-12JAN-2015-CHLOR-N140.0 ppb
2015-02-09FEB-2015-CHLOR-A170.0 ppb
2015-02-09FEB-2015-CHLOR-M130.0 ppb
2015-02-09FEB-2015-CHLOR-N180.0 ppb
2015-03-09MAR-2015-CHLOR-A110.0 ppb
2015-03-09MAR-2015-CHLOR-M100.0 ppb
2015-03-09MAR-2015-CHLOR-N90.0 ppb
2015-04-06APR-2015-CHLOR-A90.0 ppb
2015-04-06APR-2015-CHLOR-M90.0 ppb
2015-04-06APR-2015-CHLOR-N80.0 ppb
2015-05-04MAY-2015-CHLOR-A70.0 ppb
2015-05-04MAY-2015-CHLOR-M80.0 ppb
2015-05-04MAY-2015-CHLOR-N80.0 ppb
2015-06-09JUN-2015-CHLOR-A50.0 ppb
2015-06-09JUN-2015-CHLOR-M50.0 ppb
2015-06-09JUN-2015-CHLOR-N50.0 ppb
2015-07-12JUL-2015-CHLOR-A70.0 ppb
2015-07-12JUL-2015-CHLOR-M80.0 ppb
2015-07-12JUL-2015-CHLOR-N70.0 ppb
2015-08-10AUG-2015-CHLOR-AND
2015-08-10AUG-2015-CHLOR-MND
2015-08-10AUG-2015-CHLOR-NND
2015-09-14SEP-2015-CHLOR-AND
2015-09-14SEP-2015-CHLOR-MND
2015-09-14SEP-2015-CHLOR-NND
2015-10-05OCT-2015-CHLOR-A90.0 ppb
2015-10-05OCT-2015-CHLOR-M80.0 ppb
2015-10-05OCT-2015-CHLOR-N80.0 ppb
2015-11-10NOV-2015-CHLOR-A90.0 ppb
2015-11-10NOV-2015-CHLOR-M90.0 ppb
2015-11-10NOV-2015-CHLOR-N100.0 ppb
2015-12-07DEC-2015-CHLOR-A100.0 ppb
2015-12-07DEC-2015-CHLOR-M80.0 ppb
2015-12-07DEC-2015-CHLOR-N80.0 ppb
2016-01-11JAN-2016-CHLOR-A60.0 ppb
2016-01-11JAN-2016-CHLOR-M70.0 ppb
2016-01-11JAN-2016-CHLOR-N60.0 ppb
2016-02-08FEB-2016-CHLOR-AND
2016-02-08FEB-2016-CHLOR-MND
2016-02-08FEB-2016-CHLOR-NND
2016-03-07MAR-2016-CHLOR-AND
2016-03-07MAR-2016-CHLOR-MND
2016-03-07MAR-2016-CHLOR-NND
2016-04-04APR-2016-CHLOR-AND
2016-04-04APR-2016-CHLOR-MND
2016-04-04APR-2016-CHLOR-NND
2016-05-03MAY-2016-CHLOR-AND
2016-05-03MAY-2016-CHLOR-MND
2016-05-03MAY-2016-CHLOR-NND
2016-06-06JUN-2016-CHLOR-AND
2016-06-06JUN-2016-CHLOR-MND
2016-06-06JUN-2016-CHLOR-NND
2016-07-11JUL-2016-CHLOR-AND
2016-07-11JUL-2016-CHLOR-MND
2016-07-11JUL-2016-CHLOR-NND
2016-08-08AUG-2016-CHLOR-AND
2016-08-08AUG-2016-CHLOR-MND
2016-08-08AUG-2016-CHLOR-NND
2016-09-12SEP-2016-CHLOR-AND
2016-09-12SEP-2016-CHLOR-MND
2016-09-12SEP-2016-CHLOR-NND
2016-10-11OCT-2016-CHLOR-AND
2016-10-11OCT-2016-CHLOR-MND
2016-10-11OCT-2016-CHLOR-NND
2016-11-07NOV-2016-CHLOR-AND
2016-11-07NOV-2016-CHLOR-MND
2016-11-07NOV-2016-CHLOR-NND
2016-12-05DEC-2016-CHLOR-AND
2016-12-05DEC-2016-CHLOR-MND
2016-12-05DEC-2016-CHLOR-NND
2017-01-09JAN-2017-CHLOR-AND
2017-01-09JAN-2017-CHLOR-MND
2017-01-09JAN-2017-CHLOR-NND
2017-02-13FEB-2017-CHLOR-AND
2017-02-13FEB-2017-CHLOR-MND
2017-02-13FEB-2017-CHLOR-NND
2017-05-08MAY-2017-CHLOR-AND
2017-05-08MAY-2017-CHLOR-MND
2017-05-08MAY-2017-CHLOR-NND
2017-08-07AUG-2017-CHLOR-AND
2017-08-07AUG-2017-CHLOR-MND
2017-08-07AUG-2017-CHLOR-NND
2017-11-06NOV-2017-CHLOR-AND
2017-11-06NOV-2017-CHLOR-MND
2017-11-06NOV-2017-CHLOR-NND
2018-02-05FEB2018-CHLOR-AVND
2018-02-05FEB2018-CHLOR-MAND
2018-02-05FEB2018-CHLOR-NFND
2018-05-07MAY2018-CHLOR-AVND
2018-05-07MAY2018-CHLOR-MAND
2018-05-07MAY2018-CHLOR-NFND
2018-08-13AUG2018-CHLOR-AVND
2018-08-13AUG2018-CHLOR-MAND
2018-08-13AUG2018-CHLOR-NFND
2018-11-06NOV2018-CHLOR-AV290.0 ppb
2018-11-06NOV2018-CHLOR-MA260.0 ppb
2018-11-06NOV2018-CHLOR-NF280.0 ppb
2019-02-11FEB2019-CHLOR-AV190.0 ppb
2019-02-11FEB2019-CHLOR-MA200.0 ppb
2019-02-11FEB2019-CHLOR-NF240.0 ppb
2019-06-03JUN2019-CHLOR-AVND
2019-06-03JUN2019-CHLOR-MAND
2019-06-03JUN2019-CHLOR-NFND
2019-08-20AUG2019-CHLOR-MAND
2019-08-20AUG2019-CHLOR-NFND
2019-11-18NOV2019-CHLOR-AVND
2019-11-18NOV2019-CHLOR-MAND
2019-11-18NOV2019-CHLOR-NFND