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Chlorite

Status: National drinking water standard exists

 

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.

2015:

FOUND
FOUND ABOVE HEALTH GUIDELINES

26

states detected

1,241

utilities detected

25 million

people served

25

states over health guideline

1,077

utilities over health guideline

20 million

people served over health guideline

Health concerns for chlorite

Change to blood cells

Change to the thyroid

Hormone disruption

Harm to reproduction and child development

State and national drinking water standards and health guidelines

Health Guideline 50 ppb

The 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.

ppb = parts per billion.

EPA Maximum Contaminant
Level (MCL) 1,000 ppb

The enforceable federal standard that defines the highest level of a contaminant allowed in drinking water.

ppb = parts per billion.

EPA Maximum Contaminant
Level Goal (MCLG)800 ppb

A non-enforceable federal health guideline. For cancer-causing chemicals, these health goals are typically set to zero.

ppb = parts per billion.

States reporting chlorite in drinking water

UTILITIES REPORTING ABOVE HEALTH GUIDELINES UTILITIES WITH CONTAMINATION
State UtilitiesPeople Served UtilitiesPeople Served
Texas3144,099,2103997,741,803
Arizona102,599,975112,600,100
California92,133,00292,133,002
Alabama1011,827,0351011,827,035
Arkansas841,448,946891,468,099
Oklahoma1141,088,0831431,286,866
Georgia27930,617301,075,378
North Carolina421,066,768421,066,768
Colorado401,024,055431,042,327
Kentucky21974,040341,028,700
Kansas77755,76178756,852
Virginia10401,53314582,510
Massachusetts13355,41416483,637
Illinois84369,48592388,540
Pennsylvania10246,67210246,672
Iowa25217,74825217,748
Missouri49176,24549176,245
Ohio11101,45112131,001
Connecticut487,851487,851
West Virginia1085,0841085,084
Maine383,203383,203
Rhode Island13,178571,446
Washington00467,074
New York1543,1481543,148
Minnesota120,400120,400
New Mexico28,13728,137
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Utilities with the highest amounts of chlorite, 2015

ALL UTILITIES
LARGE UTILITIES
UtilityLocationTestsAverage levelPeople served
E J Water Corp*Dieterich, IL12 of 12818.3 ppb12,896
Jasper Water Works and Sewer Board*Jasper, AL24 of 24799.0 ppb29,700
Altus*Altus, OK12 of 12793.1 ppb21,477
Shawnee Municipal Authority*Shawnee, OK12 of 12788.9 ppb29,990
Clarinda Water Plant*Clarinda, IA36 of 36762.2 ppb4,822
San Patricio Municipal Water District*Ingleside, TX30 of 30755.0 ppb225
Maryville*Maryville, MO36 of 36748.3 ppb11,972
Montgomery County Regional Public Water Authority*Mount Ida, AR36 of 36747.4 ppb3,370
Lake of Egypt PWD*Marion, IL12 of 12736.7 ppb10,560
Cameron*Cameron, MO36 of 36724.2 ppb9,933
ViennaVienna, IL12 of 12722.5 ppb1,677
Governmental Utility Service Corporation*Bessemer, AL21 of 21717.5 ppb32
City of Port ArthurPort Arthur, TX36 of 36709.4 ppb54,548
Shelby County Water System*Columbiana, AL4 of 4701.0 ppb34,647
Belle Vernon Borough Municipal AuthorityBelle Vernon, PA373 of 377693.6 ppb6,000
City of Mineral Wells*Mineral Wells, TX36 of 36690.3 ppb16,800
Smiths Water and Sewer Authority*Smiths Station, AL33 of 33685.0 ppb27,780
Okla Ordnance Works Authority*Pryor, OK15 of 15680.6 ppb4,000
Alexander City Water Department*Alex City, AL21 of 21676.2 ppb27,000
Vienna Correctional CenterVienna, IL12 of 12675.0 ppb3,462
Perry Water & Light Department*Perry, OK30 of 33669.1 ppb5,230
Cynthiana Municipal Water Works*Cynthiana, KY27 of 27666.7 ppb7,722
Maumelle Water ManagementLittle Rock, AR12 of 12659.2 ppb17,200
Hamilton Water Works and Sewer Board*Hamilton, AL18 of 18650.6 ppb10,500
City of NoconaNocona, TX36 of 36643.7 ppb3,033
Albion Village*Waterport, NY13 of 13643.6 ppb17,206
Upper Surface Creek Domestic WuaCedaredge, CO6 of 6636.2 ppb2,700
Upper Bear Creek Water Authority*Haleyville, AL18 of 18634.2 ppb30
City of Brenham*Brenham, TX39 of 39621.0 ppb15,716
Searcy Waterworks*Searcy, AR12 of 12620.1 ppb23,768

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Chlorite, but it likely has the contaminant in its water supply.

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UtilityLocationTestsAverage levelPeople served
E J Water Corp*Dieterich, IL12 of 12818.3 ppb12,896
Jasper Water Works and Sewer Board*Jasper, AL24 of 24799.0 ppb29,700
Altus*Altus, OK12 of 12793.1 ppb21,477
Shawnee Municipal Authority*Shawnee, OK12 of 12788.9 ppb29,990
Maryville*Maryville, MO36 of 36748.3 ppb11,972
Lake of Egypt PWD*Marion, IL12 of 12736.7 ppb10,560
City of Port ArthurPort Arthur, TX36 of 36709.4 ppb54,548
Shelby County Water System*Columbiana, AL4 of 4701.0 ppb34,647
City of Mineral Wells*Mineral Wells, TX36 of 36690.3 ppb16,800
Smiths Water and Sewer Authority*Smiths Station, AL33 of 33685.0 ppb27,780
Alexander City Water Department*Alex City, AL21 of 21676.2 ppb27,000
Maumelle Water ManagementLittle Rock, AR12 of 12659.2 ppb17,200
Hamilton Water Works and Sewer Board*Hamilton, AL18 of 18650.6 ppb10,500
Albion Village*Waterport, NY13 of 13643.6 ppb17,206
City of Brenham*Brenham, TX39 of 39621.0 ppb15,716
Searcy Waterworks*Searcy, AR12 of 12620.1 ppb23,768
Muscle Shoals Utility Board*Muscle Shoals, AL18 of 18604.3 ppb18,303
Warrior River Water Authority*Mccalla, AL18 of 18576.9 ppb35,724
Laguna Madre Water DistrictPort Isabel, TX35 of 36573.8 ppb18,879
City of Denison*Denison, TX36 of 36569.7 ppb32,340
Windham Water WorksWindham, CT12 of 12567.5 ppb21,214
Ravenna City PWS*Ravenna, OH36 of 36566.3 ppb14,000
Mountain Home Waterworks*Mountain Home, AR12 of 12563.1 ppb15,877
City of Weatherford*Weatherford, TX36 of 36544.7 ppb25,250
Public Wholesale WSD 5*Iola, KS36 of 36538.5 ppb12,192
Montgomery Water Works*Montgomery, AL9 of 9529.2 ppb240,840
Brunswick County Water System*Leland, NC36 of 36524.2 ppb77,891
Nueces County WCID 3*Robstown, TX36 of 36523.1 ppb14,607
East Rio Hondo WSC*, TX37 of 42520.7 ppb20,187
Kansas City Board of Public Utilities*Kansas City, KS36 of 36518.3 ppb149,636

* This water utility supplies finished drinking water to at least one other water utility. The purchasing utility is not required to test for or report Chlorite, but it likely has the contaminant in its water supply.

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