Know Your Environment. Protect Your Health.

Chlorite

Tra Huntsville Regional Water Supply

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.

 

216

Samples

0

Samples exceeding legal limit (MCL)

48

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201868.3 ppb3618ND - 356.0 ppb
201928.3 ppb3615ND - 120.0 ppb
202014.8 ppb3610ND - 144.0 ppb
20216.94 ppb369ND - 69.1 ppb
202213.5 ppb3610ND - 120.0 ppb
2023111.5 ppb3627ND - 432.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

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
2018-01-2218-0123-1175.0 ppb
2018-01-2218-0123-285.0 ppb
2018-01-2218-0123-3337.0 ppb
2018-02-1318-0220-10242.0 ppb
2018-02-1318-0220-11193.0 ppb
2018-02-1318-0220-12356.0 ppb
2018-03-1918-0326-13134.0 ppb
2018-03-1918-0326-1487.0 ppb
2018-03-1918-0326-15130.0 ppb
2018-04-1718-0418-4120.0 ppb
2018-04-1718-0418-580.0 ppb
2018-04-1718-0418-6150.0 ppb
2018-05-1418-0515-1ND
2018-05-1418-0515-2ND
2018-05-1418-0515-3ND
2018-06-1818-0619-1ND
2018-06-1818-0619-2ND
2018-06-1818-0619-3ND
2018-07-1118-0712-10ND
2018-07-1118-0712-11ND
2018-07-1118-0712-12ND
2018-08-1418-0816-15ND
2018-08-1418-0816-16ND
2018-08-1418-0816-17ND
2018-09-1218-0913-1ND
2018-09-1218-0913-2ND
2018-09-1218-0913-3ND
2018-10-1618-1017-13ND
2018-10-1618-1017-14ND
2018-10-1618-1017-15ND
2018-11-0618-1107-1636.0 ppb
2018-11-0618-1107-1740.0 ppb
2018-11-0618-1107-1819.0 ppb
2018-12-1018-1211-1117.0 ppb
2018-12-1018-1211-243.0 ppb
2018-12-1018-1211-3115.0 ppb
2019-01-1419-0115-158.0 ppb
2019-01-1419-0115-243.0 ppb
2019-01-1419-0115-399.0 ppb
2019-02-1119-0212-147.0 ppb
2019-02-1119-0212-242.0 ppb
2019-02-1119-0212-3120.0 ppb
2019-03-1219-0313-489.0 ppb
2019-03-1219-0313-563.0 ppb
2019-03-1219-0313-6113.0 ppb
2019-04-0819-0409-432.0 ppb
2019-04-0819-0409-5ND
2019-04-0819-0409-638.0 ppb
2019-05-1319-0514-4ND
2019-05-1319-0514-5ND
2019-05-1319-0514-6ND
2019-06-1019-0611-1ND
2019-06-1019-0611-2ND
2019-06-1019-0611-3ND
2019-07-0919-0710-15ND
2019-07-0919-0710-16ND
2019-07-0919-0710-17ND
2019-08-0619-0807-1ND
2019-08-0619-0807-2ND
2019-08-0619-0807-3ND
2019-09-0919-0911-7ND
2019-09-0919-0911-899.0 ppb
2019-09-0919-0911-9ND
2019-10-0119-1002-4ND
2019-10-0119-1002-5ND
2019-10-0119-1002-655.0 ppb
2019-11-0519-1106-7ND
2019-11-0519-1106-882.0 ppb
2019-11-0519-1106-9ND
2019-12-0319-1204-4ND
2019-12-0319-1204-540.0 ppb
2019-12-0319-1204-6ND
2020-01-0620-0107-13ND
2020-01-0620-0107-14ND
2020-01-0620-0107-15ND
2020-02-1020-0211-4125.0 ppb
2020-02-1020-0211-5144.0 ppb
2020-02-1020-0211-6ND
2020-03-0920-0310-1051.0 ppb
2020-03-0920-0310-1121.0 ppb
2020-03-0920-0310-12ND
2020-04-1320-0414-1ND
2020-04-1320-0414-224.0 ppb
2020-04-1320-0414-3ND
2020-05-1120-0512-133.0 ppb
2020-05-1120-0512-242.0 ppb
2020-05-1120-0512-3ND
2020-06-0920-0610-30ND
2020-06-0920-0610-31ND
2020-06-0920-0610-3224.0 ppb
2020-07-0720-0708-13ND
2020-07-0720-0708-1435.0 ppb
2020-07-0720-0708-15ND
2020-08-0420-0806-10ND
2020-08-0420-0806-11ND
2020-08-0420-0806-12ND
2020-09-0220-0903-4ND
2020-09-0220-0903-5ND
2020-09-0220-0903-6ND
2020-10-1220-1013-1ND
2020-10-1220-1013-2ND
2020-10-1220-1013-3ND
2020-11-1020-1111-13ND
2020-11-1020-1111-1432.0 ppb
2020-11-1020-1111-15ND
2020-12-0120-1202-7ND
2020-12-0120-1202-8ND
2020-12-0120-1202-9ND
2021-01-1221-0113-1ND
2021-01-1221-0113-2ND
2021-01-1221-0113-329.0 ppb
2021-02-0921-0210-1ND
2021-02-0921-0210-2ND
2021-02-0921-0210-3ND
2021-03-0821-0309-10ND
2021-03-0821-0309-11ND
2021-03-0821-0309-915.0 ppb
2021-04-1221-0414-4ND
2021-04-1221-0414-5ND
2021-04-1221-0414-6ND
2021-05-1021-0511-4ND
2021-05-1021-0511-5ND
2021-05-1021-0511-6ND
2021-06-0721-0608-12ND
2021-06-0721-0608-1315.0 ppb
2021-06-0721-0608-14ND
2021-07-062003281ND
2021-07-06200328269.1 ppb
2021-07-062003283ND
2021-08-092013135ND
2021-08-092013136ND
2021-08-092013137ND
2021-09-072020789ND
2021-09-07202079017.0 ppb
2021-09-072020791ND
2021-10-05202953117.4 ppb
2021-10-05202953222.3 ppb
2021-10-05202953329.9 ppb
2021-11-08203973535.0 ppb
2021-11-082039736ND
2021-11-082039737ND
2021-12-062046338ND
2021-12-062046340ND
2021-12-062046341ND
2022-01-10205563632.5 ppb
2022-01-102055637ND
2022-01-102055638ND
2022-02-072063600120.0 ppb
2022-02-07206360110.6 ppb
2022-02-072063602ND
2022-03-082072124ND
2022-03-08207212550.8 ppb
2022-03-082072126ND
2022-04-112081829ND
2022-04-11208183053.0 ppb
2022-04-112081831ND
2022-05-092089882ND
2022-05-092089883ND
2022-05-092089884ND
2022-06-062096968ND
2022-06-062096969ND
2022-06-06209697012.9 ppb
2022-07-112106735ND
2022-07-112106736ND
2022-07-112106737ND
2022-08-15211674429.7 ppb
2022-08-15211674530.3 ppb
2022-08-15211674625.9 ppb
2022-09-062123304ND
2022-09-062123305ND
2022-09-062123306ND
2022-10-032131462ND
2022-10-032131463ND
2022-10-032131464ND
2022-11-142144267119.0 ppb
2022-11-142144268ND
2022-11-142144269ND
2022-12-062150292ND
2022-12-062150293ND
2022-12-062150294ND
2023-01-182162346194.0 ppb
2023-01-182162347ND
2023-01-18216234830.8 ppb
2023-02-072167763283.0 ppb
2023-02-07216776413.7 ppb
2023-02-072167765150.0 ppb
2023-03-062175775117.0 ppb
2023-03-06217577649.0 ppb
2023-03-06217577753.7 ppb
2023-04-032183984199.0 ppb
2023-04-03218398514.9 ppb
2023-04-03218398639.2 ppb
2023-05-022193214283.0 ppb
2023-05-022193215ND
2023-05-02219321636.6 ppb
2023-06-05220202536.3 ppb
2023-06-052202026ND
2023-06-052202027ND
2023-07-052210859426.0 ppb
2023-07-052210860ND
2023-07-052210861ND
2023-08-01221901596.7 ppb
2023-08-012219016ND
2023-08-012219017ND
2023-09-112229959299.0 ppb
2023-09-112229960ND
2023-09-11222996139.1 ppb
2023-10-03223668360.8 ppb
2023-10-03223668432.2 ppb
2023-10-03223668526.4 ppb
2023-11-082247158432.0 ppb
2023-11-08224715969.2 ppb
2023-11-082247160122.0 ppb
2023-12-122256160427.0 ppb
2023-12-122256161186.0 ppb
2023-12-122256162296.0 ppb