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EWG's Tap Water Database — 2021 UPDATE

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Chlorite

North Texas Municipal Water District - Bonham Water Treatment Plant

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

 

216

Samples

0

Samples exceeding legal limit (MCL)

44

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20143.47 ppb362ND - 65.0 ppb
20151.11 ppb361ND - 40.0 ppb
2016ND360ND
20170.444 ppb361ND - 16.0 ppb
201821.4 ppb367ND - 179.0 ppb
2019336.1 ppb363639.8 ppb - 903.0 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
2014-01-14Q140083100260.0 ppb
2014-01-14Q140083100165.0 ppb
2014-01-14Q1400831003ND
2014-02-10Q1404196002ND
2014-02-10Q1404196001ND
2014-02-10Q1404196003ND
2014-03-10Q1407856003ND
2014-03-10Q1407856002ND
2014-03-10Q1407856001ND
2014-04-07Q1410833002ND
2014-04-07Q1410833003ND
2014-04-07Q1410833001ND
2014-05-13Q1416068002ND
2014-05-13Q1416068001ND
2014-05-13Q1416068003ND
2014-06-09Q1420169003ND
2014-06-09Q1420169002ND
2014-06-09Q1420169001ND
2014-07-15Q1428221003ND
2014-07-15Q1428221002ND
2014-07-15Q1428221001ND
2014-08-05Q1433977002ND
2014-08-05Q1433977003ND
2014-08-05Q1433977001ND
2014-09-08Q1442425002ND
2014-09-08Q1442425003ND
2014-09-08Q1442425001ND
2014-10-07Q1451602003ND
2014-10-07Q1451602002ND
2014-10-07Q1451602001ND
2014-11-04Q1454880003ND
2014-11-04Q1454880002ND
2014-11-04Q1454880001ND
2014-12-08Q1459157003ND
2014-12-08Q1459157002ND
2014-12-08Q1459157001ND
2015-01-06Q1500290003ND
2015-01-06Q1500290002ND
2015-01-06Q1500290001ND
2015-02-03Q150446400140.0 ppb
2015-02-03Q1504464002ND
2015-02-03Q1504464003ND
2015-03-11Q1509333001ND
2015-03-11Q1509333002ND
2015-03-11Q1509333003ND
2015-04-07Q1513126003ND
2015-04-07Q1513126002ND
2015-04-07Q1513126001ND
2015-05-06Q1517050001ND
2015-05-06Q1517050002ND
2015-05-06Q1517050003ND
2015-06-15Q1522289002ND
2015-06-15Q1522289003ND
2015-06-15Q1522289001ND
2015-07-21Q1528525003ND
2015-07-21Q1528525002ND
2015-07-21Q1528525001ND
2015-08-10Q1531464002ND
2015-08-10Q1531464003ND
2015-08-10Q1531464001ND
2015-09-09Q1535126002ND
2015-09-09Q1535126003ND
2015-09-09Q1535126001ND
2015-10-06Q1539403002ND
2015-10-06Q1593403003ND
2015-10-06Q1539403001ND
2015-11-10Q1544394003ND
2015-11-10Q1544394002ND
2015-11-10Q1544394001ND
2015-12-02Q1547653002ND
2015-12-02Q1547653003ND
2015-12-02Q1547653001ND
2016-01-06Q1600374001ND
2016-01-06Q1600374002ND
2016-01-06Q1600374003ND
2016-02-10Q1606349002ND
2016-02-10Q1606349003ND
2016-02-10Q1606349001ND
2016-03-02Q1609297001ND
2016-03-02Q1609297003ND
2016-03-02Q1609297002ND
2016-04-05Q1613530001ND
2016-04-05Q1613530003ND
2016-04-05Q1613530002ND
2016-05-04Q1617812003ND
2016-05-04Q1617812001ND
2016-05-04Q1617812002ND
2016-06-07Q1623013002ND
2016-06-07Q1623013003ND
2016-06-07Q1623013001ND
2016-07-19Q1629684002ND
2016-07-19Q1629684003ND
2016-07-19Q1629684001ND
2016-08-08Q1633177002ND
2016-08-08Q1633177003ND
2016-08-08Q1633177001ND
2016-09-13Q1637777002ND
2016-09-13Q1637777003ND
2016-09-13Q1637777001ND
2016-10-05Q1642576002ND
2016-10-05Q1642576003ND
2016-10-05Q1642576001ND
2016-11-02Q1647528003ND
2016-11-02Q1647528002ND
2016-11-02Q1647528001ND
2016-12-06Q1653497003ND
2016-12-06Q1653497002ND
2016-12-06Q1653497001ND
2017-01-10Q1701469001ND
2017-01-10Q1701469003ND
2017-01-10Q1701469002ND
2017-02-06Q1705021001ND
2017-02-06Q1705021002ND
2017-02-06Q1705021003ND
2017-03-08Q1709974003ND
2017-03-08Q1709974001ND
2017-03-08Q1709974002ND
2017-04-11Q1715098001ND
2017-04-11Q1715098003ND
2017-04-11Q1715098002ND
2017-05-03Q1718364003ND
2017-05-03Q1718364002ND
2017-05-03Q1718364001ND
2017-06-06Q1723913002ND
2017-06-06Q1723913001ND
2017-06-06Q1723913003ND
2017-07-10Q1727985001ND
2017-07-10Q1727985003ND
2017-07-10Q1727985002ND
2017-08-01Q173200400316.0 ppb
2017-08-01Q1732004001ND
2017-08-01Q1732004002ND
2017-09-06Q1741184002ND
2017-09-06Q1741184003ND
2017-09-06Q1741184001ND
2017-10-03Q1748946003ND
2017-10-03Q1748946002ND
2017-10-03Q1748946001ND
2017-11-07Q1757475001ND
2017-11-07Q1757475003ND
2017-11-07Q1757475002ND
2017-12-14Q1766354003ND
2017-12-14Q1766354002ND
2017-12-14Q1766354001ND
2018-01-03Q1800296001ND
2018-01-03Q1800296003ND
2018-01-03Q1800296002ND
2018-02-06Q1805134003ND
2018-02-06Q1805134002ND
2018-02-06Q1805134001ND
2018-03-06Q1809518002ND
2018-03-06Q1809518001ND
2018-03-06Q1809518003ND
2018-04-03Q1814066001ND
2018-04-03Q1814066003ND
2018-04-03Q1814066002ND
2018-05-02Q1817906003ND
2018-05-02Q1817906001179.0 ppb
2018-05-02Q1817906002ND
2018-06-05Q182264800298.4 ppb
2018-06-05Q182264800366.6 ppb
2018-06-05Q182264800189.2 ppb
2018-07-10Q1827523003ND
2018-07-10Q1827523001ND
2018-07-10Q1827523002ND
2018-08-07Q1831846003ND
2018-08-07Q1831846002ND
2018-08-07Q1831846001ND
2018-09-10Q1835930002ND
2018-09-10Q1835930003ND
2018-09-10Q1835930001ND
2018-10-04Q1839814001ND
2018-10-04Q1839814003ND
2018-10-04Q1839814002ND
2018-11-07Q1844727002ND
2018-11-07Q1844727003ND
2018-11-07Q1844727001ND
2018-12-04Q1849802002136.0 ppb
2018-12-04Q1849802003131.0 ppb
2018-12-04Q184980200168.4 ppb
2019-01-08Q1901195002538.0 ppb
2019-01-08Q1901195003534.0 ppb
2019-01-08Q1901195001533.0 ppb
2019-02-05Q1905642001634.0 ppb
2019-02-05Q1905642003603.0 ppb
2019-02-05Q1905642002563.0 ppb
2019-03-05Q1909750003593.0 ppb
2019-03-05Q1909750002531.0 ppb
2019-03-05Q1909750001616.0 ppb
2019-04-02Q1913551003311.0 ppb
2019-04-02Q1913551001374.0 ppb
2019-04-02Q1913551002195.0 ppb
2019-05-07Q1922901001197.0 ppb
2019-05-07Q1922901002169.0 ppb
2019-05-07Q1922901003178.0 ppb
2019-06-04Q1932035001138.0 ppb
2019-06-04Q1932035003139.0 ppb
2019-06-04Q1932035002164.0 ppb
2019-07-09Q1943813001337.0 ppb
2019-07-09Q1943813003202.0 ppb
2019-07-09Q1943813002252.0 ppb
2019-08-07Q1953253002219.0 ppb
2019-08-07Q1953253003247.0 ppb
2019-08-07Q1953253001208.0 ppb
2019-09-10Q1964303001116.0 ppb
2019-09-10Q1964303002152.0 ppb
2019-09-10Q1964303003140.0 ppb
2019-10-08Q197217700181.0 ppb
2019-10-08Q197217700264.4 ppb
2019-10-08Q197217700339.8 ppb
2019-11-05Q1976058003127.0 ppb
2019-11-05Q197605800298.0 ppb
2019-11-05Q1976058001112.0 ppb
2019-12-021947231-02893.0 ppb
2019-12-021947231-03903.0 ppb
2019-12-021947231-04898.0 ppb