Know Your Environment. Protect Your Health.

Chlorite

Oswego, City of

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.

 

217

Samples

4

Samples exceeding legal limit (MCL)

112

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2018426.3 ppb3627ND - 3,300.0 ppb
2019135.3 ppb363611.0 ppb - 290.0 ppb
2020188.9 ppb363640.0 ppb - 470.0 ppb
2021222.5 ppb3621ND - 1,500.0 ppb
2022ND370ND
20233.42 ppb366ND - 29.0 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
2018-01-09JAN2018- AVG160.0 ppb
2018-01-09JAN2018- MAX190.0 ppb
2018-01-09JAN2018-NFC140.0 ppb
2018-02-06FEB2018- AVG580.0 ppb
2018-02-06FEB2018- MAX580.0 ppb
2018-02-06FEB2018-NFC580.0 ppb
2018-03-13MAR2018- AVG3,300.0 ppb
2018-03-13MAR2018- MAX2,900.0 ppb
2018-03-13MAR2018-NFC3,000.0 ppb
2018-04-11APR2018- AVG120.0 ppb
2018-04-11APR2018- MAX94.0 ppb
2018-04-11APR2018-NFC120.0 ppb
2018-05-15MAY2018- AVG230.0 ppb
2018-05-15MAY2018- MAX94.0 ppb
2018-05-15MAY2018-NFC230.0 ppb
2018-06-11JUN2018- AVGND
2018-06-11JUN2018- MAXND
2018-06-11JUN2018-NFCND
2018-07-23JUL2018- AVGND
2018-07-23JUL2018- MAXND
2018-07-23JUL2018-NFCND
2018-08-07AUG2018- AVGND
2018-08-07AUG2018- MAXND
2018-08-07AUG2018-NFCND
2018-09-12SEP2018- AVG130.0 ppb
2018-09-12SEP2018- MAX130.0 ppb
2018-09-12SEP2018-NFC250.0 ppb
2018-10-09OCT2018- AVG340.0 ppb
2018-10-09OCT2018- MAX270.0 ppb
2018-10-09OCT2018-NFC430.0 ppb
2018-11-13NOV2018- AVG270.0 ppb
2018-11-13NOV2018- MAX180.0 ppb
2018-11-13NOV2018-NFC330.0 ppb
2018-12-04DEC2018- AVG180.0 ppb
2018-12-04DEC2018- MAX200.0 ppb
2018-12-04DEC2018-NFC320.0 ppb
2019-01-08JAN2019- AVG210.0 ppb
2019-01-08JAN2019- MAX210.0 ppb
2019-01-08JAN2019-NFC210.0 ppb
2019-02-12FEB2019- AVG270.0 ppb
2019-02-12FEB2019- MAX290.0 ppb
2019-02-12FEB2019-NFC280.0 ppb
2019-03-11MAR2019- AVG130.0 ppb
2019-03-11MAR2019- MAX130.0 ppb
2019-03-11MAR2019-NFC190.0 ppb
2019-04-09APR2019- MAX140.0 ppb
2019-04-09APR2019-NFC40.0 ppb
2019-04-10APR2019- AVG140.0 ppb
2019-05-14MAY2019- AVG19.0 ppb
2019-05-14MAY2019- MAX11.0 ppb
2019-05-14MAY2019-NFC13.0 ppb
2019-06-11JUN2019- AVG20.0 ppb
2019-06-11JUN2019- MAX35.0 ppb
2019-06-11JUN2019-NFC23.0 ppb
2019-07-09JUL2019- AVG69.0 ppb
2019-07-09JUL2019- MAX66.0 ppb
2019-07-09JUL2019-NFC240.0 ppb
2019-08-06AUG2019- AVG130.0 ppb
2019-08-06AUG2019- MAX130.0 ppb
2019-08-06AUG2019-NFC220.0 ppb
2019-09-10SEP2019- AVG75.0 ppb
2019-09-10SEP2019- MAX150.0 ppb
2019-09-10SEP2019-NFC180.0 ppb
2019-10-08OCT2019- AVG95.0 ppb
2019-10-08OCT2019- MAX91.0 ppb
2019-10-08OCT2019-NFC180.0 ppb
2019-11-12NOV2019- AVG240.0 ppb
2019-11-12NOV2019- MAX100.0 ppb
2019-11-12NOV2019-NFC230.0 ppb
2019-12-10DEC2019- AVG83.0 ppb
2019-12-10DEC2019- MAX82.0 ppb
2019-12-10DEC2019-NFC150.0 ppb
2020-01-14JAN2020-NFC100.0 ppb
2020-01-14JAN2020- AVG96.0 ppb
2020-01-14JAN2020- MAX98.0 ppb
2020-02-11FEB2020-NFC190.0 ppb
2020-02-11FEB2020- AVG200.0 ppb
2020-02-11FEB2020- MAX200.0 ppb
2020-03-17MAR2020-NFC79.0 ppb
2020-03-17MAR2020- AVG63.0 ppb
2020-03-17MAR2020- MAX67.0 ppb
2020-04-14APR2020-NFC310.0 ppb
2020-04-14APR2020- AVG310.0 ppb
2020-04-14APR2020- MAX210.0 ppb
2020-05-12MAY2020- MAX170.0 ppb
2020-05-12MAY2020-NFC97.0 ppb
2020-05-12MAY2020- AVG40.0 ppb
2020-06-16JUN2020-NFC300.0 ppb
2020-06-16JUN2020- AVG240.0 ppb
2020-06-16JUN2020- MAX130.0 ppb
2020-07-15JUL2020-NFC180.0 ppb
2020-07-15JUL2020- AVG190.0 ppb
2020-07-15JUL2020- MAX110.0 ppb
2020-08-10AUG2020-NFC170.0 ppb
2020-08-10AUG2020- AVG160.0 ppb
2020-08-10AUG2020- MAX120.0 ppb
2020-09-15SEP2020-NFC240.0 ppb
2020-09-15SEP2020- AVG190.0 ppb
2020-09-15SEP2020- MAX120.0 ppb
2020-10-13OCT2020-NFC220.0 ppb
2020-10-13OCT2020- AVG130.0 ppb
2020-10-13OCT2020- MAX240.0 ppb
2020-11-17NOV2020-NFC170.0 ppb
2020-11-17NOV2020- AVG160.0 ppb
2020-11-17NOV2020- MAX150.0 ppb
2020-12-08DEC2020-NFC430.0 ppb
2020-12-08DEC2020- AVG450.0 ppb
2020-12-08DEC2020- MAX470.0 ppb
2021-01-12JAN2021-NFC240.0 ppb
2021-01-12JAN2021- AVG240.0 ppb
2021-01-12JAN2021- MAX240.0 ppb
2021-02-09FEB2021-NFC360.0 ppb
2021-02-09FEB2021- AVG220.0 ppb
2021-02-09FEB2021- MAX300.0 ppb
2021-03-09MAR2021- MAX350.0 ppb
2021-03-09MAR2021-NFC310.0 ppb
2021-03-09MAR2021- AVG360.0 ppb
2021-04-13APR2021-NFC270.0 ppb
2021-04-13APR2021- AVG280.0 ppb
2021-04-13APR2021- MAX280.0 ppb
2021-05-17MAY2021-NFC290.0 ppb
2021-05-17MAY2021- AVG260.0 ppb
2021-05-17MAY2021- MAX170.0 ppb
2021-06-14JUN2021-NFC280.0 ppb
2021-06-14JUN2021- AVG260.0 ppb
2021-06-14JUN2021- MAX250.0 ppb
2021-07-13JUL2021-NFC1,500.0 ppb
2021-07-13JUL2021- AVG600.0 ppb
2021-07-13JUL2021- MAX950.0 ppb
2021-08-17AUG2021-NFCND
2021-08-17AUG2021_AVGND
2021-08-17AUG2021- MAXND
2021-09-14SEP2021-NFCND
2021-09-14SEP2021_AVGND
2021-09-14SEP2021- MAXND
2021-10-26OCT2021-NFCND
2021-10-26OCT2021-AVGND
2021-10-26OCT2021- MAXND
2021-11-09NOV2021- MAXND
2021-11-09NOV2021_NFCND
2021-11-09NOV2021-AVGND
2021-12-14DEC2021_NFCND
2021-12-14DEC2021-AVGND
2021-12-14DEC2021- MAXND
2022-01-12JAN2022_NFCND
2022-01-12JAN2022_AVGND
2022-01-12JAN2022- MAXND
2022-01-17JAN2023_NFCND
2022-02-08FEB2022_NFCND
2022-02-08FEB2022_AVGND
2022-02-08FEB2022- MAXND
2022-03-15MAR2022_NFCND
2022-03-15MAR2022_AVGND
2022-03-15MAR2022- MAXND
2022-04-18APR2022- MAXND
2022-04-18APR2022_NFCND
2022-04-18APR2022_AVGND
2022-05-10MAY2022_NFCND
2022-05-10MAY2022_AVGND
2022-05-10MAY2022- MAXND
2022-06-14JUN2022_NFCND
2022-06-14JUN2022_AVGND
2022-06-14JUN2022- MAXND
2022-07-12JUL2022_NFCND
2022-07-12JUL2022_AVGND
2022-07-12JUL2022- MAXND
2022-08-16AUG2022_NFCND
2022-08-16AUG2022_AVGND
2022-08-16AUG2022- MAXND
2022-09-13SEP2022_NFCND
2022-09-13SEP2022_AVGND
2022-09-13SEP2022- MAXND
2022-10-11OCT2022_NFCND
2022-10-11OCT2022_AVGND
2022-10-11OCT2022- MAXND
2022-11-15NOV2022_NFCND
2022-11-15NOV2022_AVGND
2022-11-15NOV2022- MAXND
2022-12-13DEC2022_NFCND
2022-12-13DEC2022_AVGND
2022-12-13DEC2022- MAXND
2023-01-17JAN2023_NFCND
2023-01-17JAN2023_AVGND
2023-01-17JAN2023- MAXND
2023-02-23FEB2023_NFCND
2023-02-23FEB2023_AVGND
2023-02-23FEB2023- MAXND
2023-03-15MAR2023_NFC15.0 ppb
2023-03-15MAR2023_AVG15.0 ppb
2023-03-15MAR2023- MAX16.0 ppb
2023-04-11APR2023_NFC21.0 ppb
2023-04-11APR2023_AVG29.0 ppb
2023-04-11APR2023- MAX27.0 ppb
2023-05-30MAY2023_NFCND
2023-05-30MAY2023_AVGND
2023-05-30MAY2023- MAXND
2023-06-13JUN2023_NFCND
2023-06-13JUN2023_AVGND
2023-06-13JUN2023- MAXND
2023-07-18JUL2023_NFCND
2023-07-18JUL2023_AVGND
2023-07-18JUL2023- MAXND
2023-08-15AUG2023_NFCND
2023-08-15AUG2023_AVGND
2023-08-15AUG2023- MAXND
2023-09-13SEP2023_NFCND
2023-09-13SEP2023_AVGND
2023-09-13SEP2023- MAXND
2023-10-16OCT2023_AVGND
2023-10-16OCT2023- MAXND
2023-10-16OCT2023_NFCND
2023-11-14NOV2023_NFCND
2023-11-14NOV2023_AVGND
2023-11-14NOV2023- MAXND
2023-12-12DEC2023_NFCND
2023-12-12DEC2023_AVGND
2023-12-12DEC2023- MAXND