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EWG's Tap Water Database — 2019 UPDATE

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Chlorite

Wellborn SUD

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.

 

141

Samples

0

Samples exceeding legal limit (MCL)

77

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013102.7 ppb154ND - 710.0 ppb
2014224.0 ppb3022ND - 810.0 ppb
2015380.8 ppb3631ND - 760.0 ppb
2016228.0 ppb3022ND - 690.0 ppb
2017117.3 ppb3012ND - 900.0 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
2013-08-1413-0819-35ND
2013-08-1413-0819-34710.0 ppb
2013-08-1413-0819-36ND
2013-09-1813-0923-10540.0 ppb
2013-09-1813-0923-12ND
2013-09-1813-0923-11190.0 ppb
2013-10-1613-1018-4100.0 ppb
2013-10-1613-1018-5ND
2013-10-1613-1018-6ND
2013-11-2013-1122-5ND
2013-11-2013-1122-4ND
2013-11-2013-1122-6ND
2013-12-1113-1213-1ND
2013-12-1113-1213-3ND
2013-12-1113-1213-2ND
2014-01-1514-0117-11280.0 ppb
2014-01-1514-0117-13ND
2014-01-1514-0117-12300.0 ppb
2014-04-2914-0501-270.0 ppb
2014-04-2914-0501-1810.0 ppb
2014-04-2914-0501-3ND
2014-05-1514-0519-6ND
2014-05-1514-0519-5410.0 ppb
2014-05-1514-0519-4550.0 ppb
2014-06-1814-0623-2210.0 ppb
2014-06-1814-0623-3ND
2014-06-1914-0623-1590.0 ppb
2014-07-1614-0722-4440.0 ppb
2014-07-1614-0722-6ND
2014-07-1614-0722-5ND
2014-08-1314-0815-1730.0 ppb
2014-08-1314-0815-2100.0 ppb
2014-08-1314-0815-320.0 ppb
2014-09-2414-0929-720.0 ppb
2014-09-2414-0929-8ND
2014-09-2414-0929-9ND
2014-10-2214-1024-1500.0 ppb
2014-10-2214-1024-220.0 ppb
2014-10-2214-1024-320.0 ppb
2014-11-1214-1114-1220.0 ppb
2014-11-1214-1114-11390.0 ppb
2014-11-1214-1114-1330.0 ppb
2014-12-1814-1219-2600.0 ppb
2014-12-1814-1219-1570.0 ppb
2014-12-1814-1219-340.0 ppb
2015-01-1915-0121-5700.0 ppb
2015-01-1915-0121-6250.0 ppb
2015-01-1915-0121-4500.0 ppb
2015-02-1815-0224-9220.0 ppb
2015-02-1815-0224-7590.0 ppb
2015-02-1815-0224-8390.0 ppb
2015-03-2515-0327-2ND
2015-03-2515-0327-3ND
2015-03-2515-0327-1760.0 ppb
2015-04-1515-0417-5510.0 ppb
2015-04-1515-0417-4660.0 ppb
2015-04-1515-0417-6210.0 ppb
2015-05-1315-0515-1700.0 ppb
2015-05-1315-0515-2610.0 ppb
2015-05-1315-0515-3250.0 ppb
2015-06-2415-0625-2410.0 ppb
2015-06-2415-0625-1470.0 ppb
2015-06-2415-0625-340.0 ppb
2015-07-1615-0721-6790.0 ppb
2015-07-1615-0721-66ND
2015-07-1615-0721-68ND
2015-08-1715-0820-4490.0 ppb
2015-08-1715-0820-5160.0 ppb
2015-08-1715-0820-6ND
2015-09-1515-0917-16690.0 ppb
2015-09-1515-0917-17570.0 ppb
2015-09-1515-0917-1850.0 ppb
2015-10-2215-1026-1740.0 ppb
2015-10-2215-1026-2720.0 ppb
2015-10-2215-1026-3270.0 ppb
2015-11-1815-1120-2720.0 ppb
2015-11-1815-1120-1650.0 ppb
2015-11-1815-1120-370.0 ppb
2015-12-1715-1221-1450.0 ppb
2015-12-1715-1221-2440.0 ppb
2015-12-1715-1221-3330.0 ppb
2016-01-2116-0125-1450.0 ppb
2016-01-2116-0125-280.0 ppb
2016-01-2116-0125-370.0 ppb
2016-02-2616-0301-1500.0 ppb
2016-02-2616-0301-2380.0 ppb
2016-02-2616-0301-3110.0 ppb
2016-03-1616-0318-1660.0 ppb
2016-03-1616-0318-2610.0 ppb
2016-03-1616-0318-380.0 ppb
2016-04-1316-0418-5500.0 ppb
2016-04-1316-0418-4670.0 ppb
2016-04-1316-0418-6100.0 ppb
2016-05-1616-0519-18ND
2016-05-1616-0519-16160.0 ppb
2016-05-1616-0519-17150.0 ppb
2016-06-1416-0622-19220.0 ppb
2016-06-1416-0622-20ND
2016-06-1416-0622-21ND
2016-07-1416-0719-10100.0 ppb
2016-07-1416-0719-11ND
2016-07-1416-0719-12360.0 ppb
2016-08-1016-0815-1690.0 ppb
2016-08-1016-0815-250.0 ppb
2016-08-1016-0815-3ND
2016-09-1416-0916-1480.0 ppb
2016-09-1416-0916-3ND
2016-09-1416-0916-280.0 ppb
2016-10-1916-1024-1340.0 ppb
2016-10-1916-1024-2ND
2016-10-1916-1024-3ND
2017-03-2217-0324-3ND
2017-03-2217-0324-2ND
2017-03-2217-0324-160.0 ppb
2017-04-1717-0419-830.0 ppb
2017-04-1717-0419-7ND
2017-04-1717-0419-9ND
2017-05-0317-0505-6ND
2017-05-0317-0505-5ND
2017-05-0315-0505-4370.0 ppb
2017-06-1417-0616-1260.0 ppb
2017-06-1417-0616-250.0 ppb
2017-06-1417-0616-3ND
2017-07-1217-0717-6ND
2017-07-1217-0717-5280.0 ppb
2017-07-1217-0717-4700.0 ppb
2017-08-1517-0818-2ND
2017-08-1517-0818-1ND
2017-08-1517-0818-3ND
2017-09-1317-0918-2900.0 ppb
2017-09-1317-0918-3ND
2017-09-1317-0918-4ND
2017-10-1117-1012-16440.0 ppb
2017-10-1117-1012-17ND
2017-10-1117-1012-18ND
2017-11-1517-1128-17ND
2017-11-1517-1128-1630.0 ppb
2017-11-1517-1128-18ND
2017-12-1417-1215-3ND
2017-12-1417-1215-230.0 ppb
2017-12-1417-1215-1370.0 ppb