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EWG's Tap Water Database — 2019 UPDATE

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Chlorite

City of Donna

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.

 

147

Samples

0

Samples exceeding legal limit (MCL)

118

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
2013354.8 ppb65ND - 889.0 ppb
2014225.1 ppb3632ND - 799.0 ppb
2015193.5 ppb3326ND - 594.0 ppb
2016169.9 ppb3631ND - 494.0 ppb
2017270.1 ppb3631ND - 676.0 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
2013-10-0713-1008-2455.0 ppb
2013-10-0713-1008-25ND
2013-10-0713-1008-26254.0 ppb
2013-12-0413-1205-13889.0 ppb
2013-12-0413-1205-15112.0 ppb
2013-12-0413-1205-14819.0 ppb
2014-01-0813-0109-43ND
2014-01-0813-0109-41335.0 ppb
2014-01-0813-0109-42113.0 ppb
2014-02-0414-0205-7294.0 ppb
2014-02-0414-0205-8256.0 ppb
2014-02-0414-0205-947.0 ppb
2014-03-1214-0313-16290.0 ppb
2014-03-1214-0313-18ND
2014-03-1214-0313-1778.0 ppb
2014-04-1714-0418-22506.0 ppb
2014-04-1714-0418-24192.0 ppb
2014-04-1714-0418-23375.0 ppb
2014-05-0814-0512-13329.0 ppb
2014-05-0814-0512-14254.0 ppb
2014-05-0814-0512-15112.0 ppb
2014-06-1214-0613-22109.0 ppb
2014-06-1214-0613-21368.0 ppb
2014-06-1214-0613-20410.0 ppb
2014-07-0714-0708-10302.0 ppb
2014-07-0714-0708-12118.0 ppb
2014-07-0714-0708-11319.0 ppb
2014-08-0714-0811-3497.0 ppb
2014-08-0714-0811-33189.0 ppb
2014-08-0714-0811-32223.0 ppb
2014-09-1014-0911-3189.0 ppb
2014-09-1014-0911-30113.0 ppb
2014-09-1014-0911-29504.0 ppb
2014-10-0614-1007-4094.0 ppb
2014-10-0614-1007-3867.0 ppb
2014-10-0614-1007-39101.0 ppb
2014-11-1314-1114-34190.0 ppb
2014-11-1314-1114-32747.0 ppb
2014-11-1314-1114-33799.0 ppb
2014-12-1014-1211-3683.0 ppb
2014-12-1014-1211-37ND
2014-12-1014-1211-38ND
2015-01-0515-0106-21ND
2015-01-0515-0106-1977.0 ppb
2015-01-0515-0106-20ND
2015-02-0315-0204-10162.0 ppb
2015-02-0315-0204-12ND
2015-02-0315-0204-11ND
2015-04-0915-0410-13528.0 ppb
2015-04-0915-0410-1557.0 ppb
2015-04-0915-0410-1437.0 ppb
2015-05-1315-0514-2182.0 ppb
2015-05-1315-0514-19241.0 ppb
2015-05-1315-0514-20162.0 ppb
2015-06-0815-0609-32ND
2015-06-0815-0609-3059.0 ppb
2015-06-0815-0609-31ND
2015-07-0815-0709-17466.0 ppb
2015-07-0815-0709-16469.0 ppb
2015-07-0815-0709-18274.0 ppb
2015-08-1115-0812-48414.0 ppb
2015-08-1115-0812-46447.0 ppb
2015-08-1115-0812-47543.0 ppb
2015-09-1715-0918-11594.0 ppb
2015-09-1715-0918-12311.0 ppb
2015-09-1715-0918-10457.0 ppb
2015-10-1415-1015-23232.0 ppb
2015-10-1415-1015-22226.0 ppb
2015-10-1415-1015-24154.0 ppb
2015-11-1015-1111-35ND
2015-11-1015-1111-3434.0 ppb
2015-11-1015-1111-3365.0 ppb
2015-12-0316-1207-1195.0 ppb
2015-12-0316-1207-10137.0 ppb
2015-12-0316-1207-1263.0 ppb
2016-01-1316-0114-1043.0 ppb
2016-01-1316-0114-11144.0 ppb
2016-01-1316-0114-12ND
2016-02-1016-0211-26197.0 ppb
2016-02-1016-0211-25204.0 ppb
2016-02-1016-0211-2794.0 ppb
2016-03-0716-0308-29204.0 ppb
2016-03-0716-0308-28216.0 ppb
2016-03-0716-0308-3088.0 ppb
2016-04-1216-0413-45160.0 ppb
2016-04-1216-0413-43258.0 ppb
2016-04-1216-0413-44267.0 ppb
2016-05-1116-0512-28455.0 ppb
2016-05-1116-0512-29272.0 ppb
2016-05-1116-0512-30ND
2016-06-1516-0622-10445.0 ppb
2016-06-1516-0622-10370.0 ppb
2016-06-1516-0622-105ND
2016-07-1116-0712-2171.0 ppb
2016-07-1116-0712-20354.0 ppb
2016-07-1116-0712-19415.0 ppb
2016-08-1016-0811-35205.0 ppb
2016-08-1016-0811-34201.0 ppb
2016-08-1016-0811-36157.0 ppb
2016-09-0716-0908-33163.0 ppb
2016-09-0716-0908-3571.0 ppb
2016-09-0716-0908-34114.0 ppb
2016-10-1116-1012-26427.0 ppb
2016-10-1116-1012-27102.0 ppb
2016-10-1116-1012-25494.0 ppb
2016-11-0916-1110-27ND
2016-11-0916-1110-26102.0 ppb
2016-11-0916-1110-25124.0 ppb
2016-12-1516-1215-14203.0 ppb
2016-12-1516-1215-13198.0 ppb
2016-12-1516-1215-15ND
2017-01-1017-0111-2741.0 ppb
2017-01-1017-0111-26149.0 ppb
2017-01-1017-0111-25200.0 ppb
2017-02-1517-0221-50435.0 ppb
2017-02-1517-0221-49419.0 ppb
2017-02-1517-0221-51336.0 ppb
2017-03-0717-0308-22545.0 ppb
2017-03-0717-0308-23578.0 ppb
2017-03-0717-0308-2463.0 ppb
2017-04-1117-0412-15202.0 ppb
2017-04-1117-0412-13626.0 ppb
2017-04-1117-0412-14676.0 ppb
2017-05-0217-0503-22109.0 ppb
2017-05-0217-0503-21611.0 ppb
2017-05-0217-0503-20670.0 ppb
2017-06-1417-0615-16326.0 ppb
2017-06-1417-0615-17138.0 ppb
2017-06-1417-0615-18ND
2017-07-1717-0718-5ND
2017-07-1717-0718-6ND
2017-07-1717-0718-4ND
2017-08-0917-0811-2122.0 ppb
2017-08-0917-0811-2099.0 ppb
2017-08-0917-0811-1982.0 ppb
2017-09-1317-0914-21290.0 ppb
2017-09-1317-0914-22262.0 ppb
2017-09-1317-0914-23162.0 ppb
2017-10-1117-1012-32107.0 ppb
2017-10-1117-1012-3368.0 ppb
2017-10-1117-1012-31245.0 ppb
2017-11-1417-1115-27ND
2017-11-1417-1115-25546.0 ppb
2017-11-1417-1115-26531.0 ppb
2017-12-1217-1213-17498.0 ppb
2017-12-1217-1213-18504.0 ppb
2017-12-1217-1213-19185.0 ppb