Know Your Environment. Protect Your Health.

Chlorite

City of Santa Rosa

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

6

Samples exceeding legal limit (MCL)

206

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018242.9 ppb3632ND - 810.0 ppb
2019392.6 ppb3635ND - 1,550.0 ppb
2020450.5 ppb363616.8 ppb - 979.0 ppb
2021560.1 ppb3636179.0 ppb - 985.0 ppb
2022526.3 ppb3635ND - 1,010.0 ppb
2023559.3 ppb363662.5 ppb - 1,200.0 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
2018-01-0918-0110-10100.0 ppb
2018-01-0918-0110-11ND
2018-01-0918-0110-12200.0 ppb
2018-02-0618-0207-19153.0 ppb
2018-02-0618-0207-2047.0 ppb
2018-02-0618-0207-21127.0 ppb
2018-03-0618-0307-34315.0 ppb
2018-03-0618-0307-3583.0 ppb
2018-03-0618-0307-36264.0 ppb
2018-04-1118-0412-22330.0 ppb
2018-04-1118-0412-23310.0 ppb
2018-04-1118-0412-24810.0 ppb
2018-05-0918-0510-31117.0 ppb
2018-05-0918-0510-32ND
2018-05-0918-0510-33150.0 ppb
2018-06-1218-0613-10349.0 ppb
2018-06-1218-0613-11ND
2018-06-1218-0613-12322.0 ppb
2018-07-1718-0718-13370.0 ppb
2018-07-1718-0718-14178.0 ppb
2018-07-1718-0718-15303.0 ppb
2018-08-0818-0809-7257.0 ppb
2018-08-0818-0809-8297.0 ppb
2018-08-0818-0809-9224.0 ppb
2018-09-1118-0912-34284.0 ppb
2018-09-1118-0912-35ND
2018-09-1118-0912-36221.0 ppb
2018-10-1118-1018-37260.0 ppb
2018-10-1118-1018-38190.0 ppb
2018-10-1118-1018-39223.0 ppb
2018-11-1918-1126-10668.0 ppb
2018-11-1918-1126-11376.0 ppb
2018-11-1918-1126-12373.0 ppb
2018-12-1318-1214-34381.0 ppb
2018-12-1318-1214-35121.0 ppb
2018-12-1318-1214-36342.0 ppb
2019-01-1619-0118-35124.0 ppb
2019-01-1619-0118-36ND
2019-01-1619-0118-37189.0 ppb
2019-02-1219-0214-37393.0 ppb
2019-02-1219-0214-38607.0 ppb
2019-02-1219-0214-39504.0 ppb
2019-03-201768459302.0 ppb
2019-03-201768460237.0 ppb
2019-03-201768461118.0 ppb
2019-04-171776384332.0 ppb
2019-04-171776385311.0 ppb
2019-04-171776386207.0 ppb
2019-05-031819490324.0 ppb
2019-05-03181949264.0 ppb
2019-05-031819493249.0 ppb
2019-06-181793270233.0 ppb
2019-06-18179327132.1 ppb
2019-06-181793272231.0 ppb
2019-07-111802451597.0 ppb
2019-07-111802452524.0 ppb
2019-07-111802453569.0 ppb
2019-08-0818085741,550.0 ppb
2019-08-0818085751,520.0 ppb
2019-08-081808576789.0 ppb
2019-09-131820428479.0 ppb
2019-09-131820429285.0 ppb
2019-09-131820430319.0 ppb
2019-10-081827647263.0 ppb
2019-10-081827648230.0 ppb
2019-10-081827649128.0 ppb
2019-11-141838352151.0 ppb
2019-11-141838353181.0 ppb
2019-11-141838354159.0 ppb
2019-12-101846708757.0 ppb
2019-12-101846711761.0 ppb
2019-12-101846712413.0 ppb
2020-01-151855424556.0 ppb
2020-01-151855425576.0 ppb
2020-01-151855426541.0 ppb
2020-02-121863660517.0 ppb
2020-02-121863661471.0 ppb
2020-02-121863662435.0 ppb
2020-03-171872056979.0 ppb
2020-03-171872057802.0 ppb
2020-03-171872058560.0 ppb
2020-04-081878290686.0 ppb
2020-04-081878291629.0 ppb
2020-04-081878292585.0 ppb
2020-05-121887290522.0 ppb
2020-05-121887291563.0 ppb
2020-05-121887292588.0 ppb
2020-06-111896066616.0 ppb
2020-06-111896067618.0 ppb
2020-06-111896068526.0 ppb
2020-07-151905921647.0 ppb
2020-07-151905922640.0 ppb
2020-07-151905923476.0 ppb
2020-08-171914398583.0 ppb
2020-08-171914399405.0 ppb
2020-08-171914400525.0 ppb
2020-09-171923957484.0 ppb
2020-09-171923958417.0 ppb
2020-09-171923959261.0 ppb
2020-10-13193192999.9 ppb
2020-10-131931930263.0 ppb
2020-10-13193193161.7 ppb
2020-11-161940239190.0 ppb
2020-11-16194024282.8 ppb
2020-11-16194024386.5 ppb
2020-12-15194783816.8 ppb
2020-12-151947842106.0 ppb
2020-12-151947843102.0 ppb
2021-01-131955004353.0 ppb
2021-01-131955005330.0 ppb
2021-01-131955006325.0 ppb
2021-02-111962988835.0 ppb
2021-02-111962990592.0 ppb
2021-02-111962991641.0 ppb
2021-03-161970705414.0 ppb
2021-03-161970706388.0 ppb
2021-03-161970707329.0 ppb
2021-04-141979051784.0 ppb
2021-04-141979052947.0 ppb
2021-04-141979053806.0 ppb
2021-05-111987196985.0 ppb
2021-05-111987197931.0 ppb
2021-05-111987198741.0 ppb
2021-06-151997207746.0 ppb
2021-06-151997209690.0 ppb
2021-06-151997210514.0 ppb
2021-07-132004455429.0 ppb
2021-07-132004457470.0 ppb
2021-07-132004458179.0 ppb
2021-08-112013430688.0 ppb
2021-08-112013432599.0 ppb
2021-08-112013433412.0 ppb
2021-09-162024220635.0 ppb
2021-09-162024222610.0 ppb
2021-09-162024223415.0 ppb
2021-10-132032199610.0 ppb
2021-10-132032200653.0 ppb
2021-10-132032201442.0 ppb
2021-11-102040501555.0 ppb
2021-11-102040502540.0 ppb
2021-11-102040503388.0 ppb
2021-12-142049126496.0 ppb
2021-12-142049127414.0 ppb
2021-12-142049128277.0 ppb
2022-01-252060331713.0 ppb
2022-01-252060332717.0 ppb
2022-01-252060333584.0 ppb
2022-02-152066289817.0 ppb
2022-02-152066290826.0 ppb
2022-02-152066291727.0 ppb
2022-03-152074535342.0 ppb
2022-03-152074536327.0 ppb
2022-03-152074537276.0 ppb
2022-04-152083602460.0 ppb
2022-04-152083603499.0 ppb
2022-04-152083604451.0 ppb
2022-05-2420904000191.0 ppb
2022-05-242090400147.4 ppb
2022-05-242093999273.0 ppb
2022-06-162100817563.0 ppb
2022-06-162100818521.0 ppb
2022-06-162100819455.0 ppb
2022-07-132107745498.0 ppb
2022-07-132107747470.0 ppb
2022-07-132107748115.0 ppb
2022-08-162117281341.0 ppb
2022-08-162117282758.0 ppb
2022-08-162117283485.0 ppb
2022-09-132125628831.0 ppb
2022-09-132125629851.0 ppb
2022-09-132125630633.0 ppb
2022-10-1321352001,010.0 ppb
2022-10-132135202808.0 ppb
2022-10-132315201694.0 ppb
2022-11-152144737884.0 ppb
2022-11-152144738843.0 ppb
2022-11-152144739687.0 ppb
2022-12-062150580188.0 ppb
2022-12-06215058162.5 ppb
2022-12-062150582ND
2023-01-172161910830.0 ppb
2023-01-172161913762.0 ppb
2023-01-172161914784.0 ppb
2023-02-142170036571.0 ppb
2023-02-142170038576.0 ppb
2023-02-142170039675.0 ppb
2023-03-152179400439.0 ppb
2023-03-152179401463.0 ppb
2023-03-152179402445.0 ppb
2023-04-13218836698.2 ppb
2023-04-13218836798.6 ppb
2023-04-13218836862.5 ppb
2023-05-092195353109.0 ppb
2023-05-09219535483.4 ppb
2023-05-09219535573.4 ppb
2023-06-082203907540.0 ppb
2023-06-082203908416.0 ppb
2023-06-082203909418.0 ppb
2023-07-132213898728.0 ppb
2023-07-132213899594.0 ppb
2023-07-132213900543.0 ppb
2023-08-1022220951,200.0 ppb
2023-08-102222096745.0 ppb
2023-08-102222097599.0 ppb
2023-09-122231555565.0 ppb
2023-09-122231556989.0 ppb
2023-09-122231557614.0 ppb
2023-10-1022390021,100.0 ppb
2023-10-1022390031,080.0 ppb
2023-10-102239004739.0 ppb
2023-11-062247334629.0 ppb
2023-11-062247335444.0 ppb
2023-11-062247336587.0 ppb
2023-12-062254092495.0 ppb
2023-12-062254093599.0 ppb
2023-12-062254094442.0 ppb