Chlorite
Skagit County Public Utility District 1 Judy Reservoir
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | 481.4 ppb | 50 | 50 | 280.0 ppb - 700.0 ppb |
2015 | 0.425 ppb | 36 | 36 | 0.257 ppb - 0.571 ppb |
2016 | 0.409 ppb | 36 | 34 | ND - 0.710 ppb |
2017 | 0.662 ppb | 36 | 36 | 0.458 ppb - 0.923 ppb |
2018 | 566.3 ppb | 36 | 36 | 375.0 ppb - 775.0 ppb |
2019 | 463.5 ppb | 30 | 30 | 346.0 ppb - 647.0 ppb |
ppb = parts per billion
State and national drinking water standards and health guidelines
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 |
---|---|---|
2014-01-08 | 33472 | 480.0 ppb |
2014-01-08 | 33471 | 470.0 ppb |
2014-01-08 | 33473 | 540.0 ppb |
2014-03-05 | 35222 | 500.0 ppb |
2014-03-05 | 35223 | 480.0 ppb |
2014-03-05 | 35224 | 520.0 ppb |
2014-04-02 | 36242 | 570.0 ppb |
2014-04-02 | 36243 | 580.0 ppb |
2014-04-02 | 36244 | 450.0 ppb |
2014-05-07 | 37539 | 460.0 ppb |
2014-05-07 | 37537 | 450.0 ppb |
2014-05-07 | 37538 | 430.0 ppb |
2014-06-04 | 38482 | 440.0 ppb |
2014-06-04 | 38483 | 400.0 ppb |
2014-06-04 | 38481 | 400.0 ppb |
2014-07-02 | 39469 | 460.0 ppb |
2014-07-02 | 39470 | 460.0 ppb |
2014-07-02 | 39468 | 430.0 ppb |
2014-08-06 | 40713 | 350.0 ppb |
2014-08-06 | 40711 | 700.0 ppb |
2014-08-06 | 40712 | 600.0 ppb |
2014-09-03 | 41920 | 420.0 ppb |
2014-09-03 | 41921 | 520.0 ppb |
2014-09-03 | 41922 | 500.0 ppb |
2014-09-17 | 42804 | 540.0 ppb |
2014-09-18 | 42805 | 630.0 ppb |
2014-09-19 | 42806 | 610.0 ppb |
2014-09-20 | 42807 | 540.0 ppb |
2014-09-21 | 42808 | 520.0 ppb |
2014-09-22 | 42809 | 540.0 ppb |
2014-09-23 | 42810 | 510.0 ppb |
2014-09-24 | 42811 | 530.0 ppb |
2014-10-02 | 43299 | 460.0 ppb |
2014-10-03 | 43300 | 430.0 ppb |
2014-10-04 | 43301 | 500.0 ppb |
2014-10-05 | 43302 | 500.0 ppb |
2014-10-06 | 43303 | 470.0 ppb |
2014-10-07 | 43304 | 490.0 ppb |
2014-10-08 | 43305 | 510.0 ppb |
2014-10-09 | 43587 | 520.0 ppb |
2014-10-10 | 43588 | 520.0 ppb |
2014-10-11 | 43589 | 440.0 ppb |
2014-10-12 | 43590 | 440.0 ppb |
2014-10-13 | 43591 | 500.0 ppb |
2014-11-05 | 44591 | 280.0 ppb |
2014-11-05 | 44589 | 410.0 ppb |
2014-11-05 | 44590 | 450.0 ppb |
2014-12-03 | 45655 | 360.0 ppb |
2014-12-03 | 45657 | 380.0 ppb |
2014-12-03 | 45656 | 380.0 ppb |
2015-01-07 | 46825 | 0.510 ppb |
2015-01-07 | 46824 | 0.430 ppb |
2015-01-07 | 46826 | 0.340 ppb |
2015-02-03 | 04827 | 0.571 ppb |
2015-02-03 | 04826 | 0.459 ppb |
2015-02-03 | 04825 | 0.491 ppb |
2015-03-03 | 08876 | 0.493 ppb |
2015-03-03 | 08875 | 0.535 ppb |
2015-03-03 | 08874 | 0.456 ppb |
2015-04-08 | 14743 | 0.518 ppb |
2015-04-08 | 14741 | 0.468 ppb |
2015-04-08 | 14742 | 0.447 ppb |
2015-05-05 | 19587 | 0.515 ppb |
2015-05-05 | 19586 | 0.478 ppb |
2015-05-05 | 19585 | 0.491 ppb |
2015-06-04 | 25362 | 0.486 ppb |
2015-06-04 | 25361 | 0.406 ppb |
2015-06-04 | 25363 | 0.426 ppb |
2015-07-01 | 29794 | 0.478 ppb |
2015-07-01 | 29793 | 0.452 ppb |
2015-07-01 | 29792 | 0.469 ppb |
2015-08-05 | 35832 | 0.381 ppb |
2015-08-05 | 35833 | 0.296 ppb |
2015-08-05 | 35834 | 0.325 ppb |
2015-09-01 | 41051 | 0.426 ppb |
2015-09-01 | 41050 | 0.309 ppb |
2015-09-01 | 41049 | 0.362 ppb |
2015-10-01 | 47253 | 0.342 ppb |
2015-10-01 | 47254 | 0.257 ppb |
2015-10-01 | 47255 | 0.324 ppb |
2015-11-04 | 53133 | 0.439 ppb |
2015-11-04 | 53134 | 0.303 ppb |
2015-11-04 | 53135 | 0.431 ppb |
2015-12-02 | 57760 | 0.414 ppb |
2015-12-02 | 57750 | 0.374 ppb |
2015-12-02 | 57745 | 0.402 ppb |
2016-01-06 | 0.422 ppb | |
2016-01-06 | 0.398 ppb | |
2016-01-06 | 0.389 ppb | |
2016-02-04 | 0.407 ppb | |
2016-02-04 | 0.377 ppb | |
2016-02-04 | 0.395 ppb | |
2016-03-02 | 0.448 ppb | |
2016-03-02 | 0.380 ppb | |
2016-03-02 | 0.451 ppb | |
2016-04-06 | 0.509 ppb | |
2016-04-06 | 0.503 ppb | |
2016-04-06 | 0.417 ppb | |
2016-05-04 | 0.507 ppb | |
2016-05-04 | 0.460 ppb | |
2016-05-04 | 0.483 ppb | |
2016-06-01 | ND | |
2016-06-01 | 0.286 ppb | |
2016-06-01 | ND | |
2016-07-06 | 0.275 ppb | |
2016-07-06 | 0.204 ppb | |
2016-07-06 | 0.301 ppb | |
2016-08-03 | 0.537 ppb | |
2016-08-03 | 0.346 ppb | |
2016-08-03 | 0.464 ppb | |
2016-09-07 | 0.491 ppb | |
2016-09-07 | 0.369 ppb | |
2016-09-07 | 0.437 ppb | |
2016-10-05 | 0.363 ppb | |
2016-10-05 | 0.395 ppb | |
2016-10-11 | 0.548 ppb | |
2016-11-07 | 0.397 ppb | |
2016-11-07 | 0.442 ppb | |
2016-11-07 | 0.449 ppb | |
2016-12-08 | 0.483 ppb | |
2016-12-09 | 0.710 ppb | |
2016-12-09 | 0.674 ppb | |
2017-01-10 | 0.608 ppb | |
2017-01-10 | 0.715 ppb | |
2017-01-10 | 0.761 ppb | |
2017-02-01 | 0.620 ppb | |
2017-02-01 | 0.586 ppb | |
2017-02-01 | 0.615 ppb | |
2017-03-01 | 0.535 ppb | |
2017-03-01 | 0.511 ppb | |
2017-03-01 | 0.555 ppb | |
2017-04-06 | 0.607 ppb | |
2017-04-06 | 0.458 ppb | |
2017-04-06 | 0.614 ppb | |
2017-05-04 | 0.669 ppb | |
2017-05-04 | 0.668 ppb | |
2017-05-04 | 0.510 ppb | |
2017-06-07 | 0.789 ppb | |
2017-06-07 | 0.719 ppb | |
2017-06-07 | 0.763 ppb | |
2017-07-05 | 0.704 ppb | |
2017-07-05 | 0.737 ppb | |
2017-07-05 | 0.591 ppb | |
2017-08-02 | 0.648 ppb | |
2017-08-02 | 0.810 ppb | |
2017-08-02 | 0.767 ppb | |
2017-09-06 | 0.923 ppb | |
2017-09-06 | 0.709 ppb | |
2017-09-06 | 0.816 ppb | |
2017-10-04 | 0.797 ppb | |
2017-10-04 | 0.810 ppb | |
2017-10-04 | 0.706 ppb | |
2017-11-01 | 0.663 ppb | |
2017-11-01 | 0.632 ppb | |
2017-11-01 | 0.610 ppb | |
2017-12-06 | 0.524 ppb | |
2017-12-06 | 0.557 ppb | |
2017-12-06 | 0.542 ppb | |
2018-01-18 | 580.0 ppb | |
2018-01-18 | 391.0 ppb | |
2018-01-18 | 561.0 ppb | |
2018-02-15 | 562.0 ppb | |
2018-02-15 | 444.0 ppb | |
2018-02-15 | 591.0 ppb | |
2018-03-07 | 580.0 ppb | |
2018-03-07 | 506.0 ppb | |
2018-03-07 | 663.0 ppb | |
2018-04-04 | 588.0 ppb | |
2018-04-04 | 424.0 ppb | |
2018-04-04 | 617.0 ppb | |
2018-05-02 | 611.0 ppb | |
2018-05-02 | 534.0 ppb | |
2018-05-02 | 705.0 ppb | |
2018-06-06 | 686.0 ppb | |
2018-06-06 | 643.0 ppb | |
2018-06-06 | 671.0 ppb | |
2018-07-05 | 615.0 ppb | |
2018-07-05 | 612.0 ppb | |
2018-07-05 | 691.0 ppb | |
2018-08-01 | 648.0 ppb | |
2018-08-01 | 630.0 ppb | |
2018-08-01 | 775.0 ppb | |
2018-09-05 | 571.0 ppb | |
2018-09-05 | 613.0 ppb | |
2018-09-05 | 672.0 ppb | |
2018-10-03 | 448.0 ppb | |
2018-10-03 | 554.0 ppb | |
2018-10-03 | 532.0 ppb | |
2018-11-07 | 513.0 ppb | |
2018-11-07 | 404.0 ppb | |
2018-11-07 | 524.0 ppb | |
2018-12-05 | 406.0 ppb | |
2018-12-05 | 375.0 ppb | |
2018-12-05 | 448.0 ppb | |
2019-01-09 | 417.0 ppb | |
2019-01-09 | 412.0 ppb | |
2019-01-09 | 486.0 ppb | |
2019-03-06 | 446.0 ppb | |
2019-03-06 | 494.0 ppb | |
2019-03-06 | 465.0 ppb | |
2019-04-03 | 417.0 ppb | |
2019-04-03 | 448.0 ppb | |
2019-04-03 | 441.0 ppb | |
2019-05-08 | 485.0 ppb | |
2019-05-08 | 538.0 ppb | |
2019-05-08 | 444.0 ppb | |
2019-07-03 | 459.0 ppb | |
2019-07-03 | 577.0 ppb | |
2019-07-03 | 492.0 ppb | |
2019-08-07 | 440.0 ppb | |
2019-08-07 | 552.0 ppb | |
2019-08-07 | 430.0 ppb | |
2019-09-05 | 423.0 ppb | |
2019-09-05 | 348.0 ppb | |
2019-09-06 | 346.0 ppb | |
2019-10-10 | 379.0 ppb | |
2019-10-11 | 352.0 ppb | |
2019-10-11 | 458.0 ppb | |
2019-11-06 | 487.0 ppb | |
2019-11-06 | 535.0 ppb | |
2019-11-06 | 409.0 ppb | |
2019-12-11 | 592.0 ppb | |
2019-12-11 | 647.0 ppb | |
2019-12-11 | 485.0 ppb |