Chlorite

Chlorite is a byproduct formed when chlorine dioxide is used to disinfect drinking water. It can cause anemia and affect the nervous system in high doses.

Chlorite is a regulated disinfection byproduct that forms when chlorine dioxide is used to treat drinking water. The EPA has set a maximum contaminant level of 1.0 mg/L for chlorite in public water systems. Water utilities typically measure chlorite levels using ion chromatography. While chlorine dioxide is an effective disinfectant, water treatment plants must carefully balance disinfection needs with minimizing byproduct formation to protect public health and comply with regulations.

People affected
22.8M
Utilities with this contaminant
501
States with this contaminant
27

Utilities with the highest levels of this contaminant

UtilityService AreasLevelPopulation Served
City Of Roma
Starr County, TX

1.510 ppm

19,123

Agua Sud
Hidalgo County, TX

1.500 ppm

111,505

City Of Granbury
Hood County, TX

1.300 ppm

10,080

City Of Mineral Wells
Palo Pinto County, TX

1.140 ppm

15,090

City Of Mission
Hidalgo County, TX

1.100 ppm

86,223

City Of Port Arthur
Jefferson County, TX

1.010 ppm

53,818

City Of Rio Grande City
Starr County, TX

1.000 ppm

18,297

Montgomery Water Works
Montgomery, AL

0.980 ppm

236,238

Muscle Shoals Utility Board
Muscle Shoals, AL

0.980 ppm

22,467

E J Water Coop
Jasper County, IL

0.950 ppm

23,944

Sources