Dichloroacetic acid
Regional Water Authority
Dichloroacetic acid, one of the group of five haloacetic acids regulated by federal standards, is formed when chlorine or other disinfectants are used to treat drinking water. Haloacetic acids and other disinfection byproducts increase the risk of cancer and may cause problems during pregnancy. Click here to read more about disinfection byproducts.
Samples
Samples exceeding legal limit (MCL)
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2018 | 15.8 ppb | 48 | 48 | 3.40 ppb - 25.9 ppb |
| 2019 | 10.7 ppb | 48 | 48 | 2.60 ppb - 15.6 ppb |
| 2020 | 11.2 ppb | 50 | 50 | 0.600 ppb - 16.8 ppb |
| 2021 | 11.4 ppb | 49 | 49 | 0.800 ppb - 18.7 ppb |
| 2022 | 11.7 ppb | 49 | 49 | 0.500 ppb - 18.5 ppb |
| 2023 | 10.0 ppb | 48 | 48 | 3.88 ppb - 15.7 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
EWG Health Guideline: 0.2 ppb
The EWG Health Guideline of 0.2 ppb for dichloroacetic acid was defined by the California Office of Environmental Health Hazard Assessment's public health goal, the level of a drinking water contaminant that does not pose a significant health risk. This health guideline protects against cancer and harm to reproduction and child development.
ppb = parts per billion
All test results
| Date | Lab ID | Result |
|---|---|---|
| 2018-03-06 | DBP 200489268 | 19.2 ppb |
| 2018-03-06 | DBP 200489275 | 22.4 ppb |
| 2018-03-06 | DBP 200489287 | 21.2 ppb |
| 2018-03-07 | DBP 200489537 | 12.8 ppb |
| 2018-03-07 | DBP 200489538 | 22.4 ppb |
| 2018-03-07 | DBP 200489539 | 24.4 ppb |
| 2018-03-07 | DBP 200489540 | 22.2 ppb |
| 2018-03-07 | DBP 200489541 | 19.2 ppb |
| 2018-03-08 | DBP 200489565 | 8.80 ppb |
| 2018-03-09 | DBP 200489701 | 23.7 ppb |
| 2018-03-09 | DBP 200489702 | 25.9 ppb |
| 2018-03-09 | DBP 200489703 | 16.0 ppb |
| 2018-06-05 | DBP 200495984 | 14.7 ppb |
| 2018-06-05 | DBP 200495989 | 16.2 ppb |
| 2018-06-05 | DBP 200496002 | 17.8 ppb |
| 2018-06-06 | DBP 200496235 | 16.2 ppb |
| 2018-06-07 | DBP 200496375 | 15.0 ppb |
| 2018-06-07 | DBP 200496376 | 18.7 ppb |
| 2018-06-07 | DBP 200496417 | 13.6 ppb |
| 2018-06-08 | DBP 200496507 | 18.2 ppb |
| 2018-06-08 | DBP 200496508 | 17.1 ppb |
| 2018-06-08 | DBP 200496509 | 20.2 ppb |
| 2018-06-08 | DBP 200496510 | 21.8 ppb |
| 2018-06-08 | DBP 200496511 | 17.8 ppb |
| 2018-09-04 | DBP 200503732 | 15.3 ppb |
| 2018-09-04 | DBP 200503737 | 5.80 ppb |
| 2018-09-04 | DBP 200503842 | 11.2 ppb |
| 2018-09-04 | DBP 200503912 | 10.4 ppb |
| 2018-09-04 | DBP 200503913 | 10.9 ppb |
| 2018-09-04 | DBP 200503914 | 15.8 ppb |
| 2018-09-05 | DBP 200503981 | 16.7 ppb |
| 2018-09-05 | DBP 200504086 | 14.1 ppb |
| 2018-09-05 | DBP 200504087 | 4.50 ppb |
| 2018-09-06 | DBP 200504185 | 3.40 ppb |
| 2018-09-06 | DBP 200504211 | 5.30 ppb |
| 2018-09-07 | DBP 200504441 | 16.1 ppb |
| 2018-12-03 | DBP 200514372 | 5.40 ppb |
| 2018-12-03 | DBP 200514406 | 15.6 ppb |
| 2018-12-04 | DBP 200514447 | 15.0 ppb |
| 2018-12-04 | DBP 200514452 | 17.4 ppb |
| 2018-12-04 | DBP 200514625 | 18.3 ppb |
| 2018-12-04 | DBP 200514626 | 18.9 ppb |
| 2018-12-04 | DBP 200514627 | 14.9 ppb |
| 2018-12-04 | DBP 200514628 | 13.5 ppb |
| 2018-12-04 | DBP 200514629 | 13.9 ppb |
| 2018-12-05 | DBP 200514952 | 16.2 ppb |
| 2018-12-06 | DBP 200515069 | 14.2 ppb |
| 2018-12-06 | DBP 200515070 | 20.0 ppb |
| 2019-03-04 | DBP 200523215 | 7.20 ppb |
| 2019-03-04 | DBP 200523217 | 9.70 ppb |
| 2019-03-05 | DBP 200523262 | 9.00 ppb |
| 2019-03-05 | DBP 200523269 | 9.80 ppb |
| 2019-03-05 | DBP 200523456 | 10.6 ppb |
| 2019-03-05 | DBP 200523457 | 15.5 ppb |
| 2019-03-05 | DBP 200523458 | 10.4 ppb |
| 2019-03-05 | DBP 200523459 | 9.90 ppb |
| 2019-03-05 | DBP 200523463 | 6.60 ppb |
| 2019-03-07 | DBP 200523884 | 10.1 ppb |
| 2019-03-08 | DBP 200524000 | 8.30 ppb |
| 2019-03-08 | DBP 200524002 | 12.2 ppb |
| 2019-06-03 | DBP 200534373 | 11.7 ppb |
| 2019-06-03 | DBP 200534414 | 10.5 ppb |
| 2019-06-04 | DBP 200534491 | 10.00 ppb |
| 2019-06-04 | DBP 200534496 | 10.5 ppb |
| 2019-06-04 | DBP 200534600 | 11.2 ppb |
| 2019-06-04 | DBP 200534725 | 12.2 ppb |
| 2019-06-04 | DBP 200534727 | 12.9 ppb |
| 2019-06-04 | DBP 200534729 | 15.6 ppb |
| 2019-06-05 | DBP 200535039 | 14.1 ppb |
| 2019-06-05 | DBP 200535041 | 10.9 ppb |
| 2019-06-06 | DBP 200535197 | 11.1 ppb |
| 2019-06-07 | DBP 200535357 | 10.3 ppb |
| 2019-09-03 | DBP 200546988 | 11.9 ppb |
| 2019-09-03 | DBP 200546993 | 2.60 ppb |
| 2019-09-04 | DBP 200547400 | 8.00 ppb |
| 2019-09-04 | DBP 200547402 | 9.10 ppb |
| 2019-09-04 | DBP 200547403 | 13.2 ppb |
| 2019-09-04 | DBP 200547404 | 12.6 ppb |
| 2019-09-04 | DBP 200547405 | 11.9 ppb |
| 2019-09-05 | DBP 200547460 | 10.1 ppb |
| 2019-09-05 | DBP 200547667 | 7.70 ppb |
| 2019-09-06 | DBP 200547826 | 11.9 ppb |
| 2019-09-06 | DBP 200547827 | 10.1 ppb |
| 2019-09-06 | DBP 200547828 | 13.6 ppb |
| 2019-12-02 | DBP 200558405 | 15.3 ppb |
| 2019-12-02 | DBP 200558406 | 11.5 ppb |
| 2019-12-02 | DBP 200558407 | 12.6 ppb |
| 2019-12-03 | DBP 200558454 | 10.2 ppb |
| 2019-12-03 | DBP 200558459 | 11.7 ppb |
| 2019-12-03 | DBP 200558612 | 11.2 ppb |
| 2019-12-04 | DBP 200558916 | 9.70 ppb |
| 2019-12-04 | DBP 200558917 | 10.3 ppb |
| 2019-12-04 | DBP 200558919 | 7.60 ppb |
| 2019-12-05 | DBP 200559073 | 11.2 ppb |
| 2019-12-05 | DBP 200559098 | 9.10 ppb |
| 2019-12-06 | DBP 200559195 | 10.4 ppb |
| 2020-03-02 | DBP 200567713 | 12.5 ppb |
| 2020-03-02 | DBP 200567714 | 16.8 ppb |
| 2020-03-02 | DBP 200567715 | 14.7 ppb |
| 2020-03-02 | DBP 200567718 | 11.4 ppb |
| 2020-03-03 | DBP 200567780 | 11.6 ppb |
| 2020-03-03 | DBP 200567787 | 13.6 ppb |
| 2020-03-03 | DBP 200567920 | 9.00 ppb |
| 2020-03-03 | DBP 200567921 | 10.1 ppb |
| 2020-03-04 | DBP 200568177 | 11.6 ppb |
| 2020-03-04 | DBP 200568178 | 10.6 ppb |
| 2020-03-05 | DBP 200568285 | 0.600 ppb |
| 2020-03-05 | DBP 200568384 | 10.1 ppb |
| 2020-03-12 | DBP 200569164 | 11.1 ppb |
| 2020-06-01 | DBP 200577264 | 12.9 ppb |
| 2020-06-01 | DBP 200577265 | 16.8 ppb |
| 2020-06-01 | DBP 200577266 | 13.7 ppb |
| 2020-06-02 | DBP 200577318 | 11.8 ppb |
| 2020-06-02 | DBP 200577327 | 11.1 ppb |
| 2020-06-02 | DBP 200577399 | 14.9 ppb |
| 2020-06-02 | DBP 200577401 | 11.4 ppb |
| 2020-06-03 | DBP 200577719 | 12.3 ppb |
| 2020-06-03 | DBP 200577721 | 15.7 ppb |
| 2020-06-04 | DBP 200577954 | 10.3 ppb |
| 2020-06-04 | DBP 200577955 | 12.0 ppb |
| 2020-06-05 | DBP 200578077 | 10.4 ppb |
| 2020-09-08 | DBP 200589109 | 9.40 ppb |
| 2020-09-08 | DBP 200589118 | 13.1 ppb |
| 2020-09-08 | DBP 200589252 | 14.4 ppb |
| 2020-09-08 | DBP 200589253 | 8.80 ppb |
| 2020-09-08 | DBP 200589254 | 7.40 ppb |
| 2020-09-09 | DBP 200589560 | 13.5 ppb |
| 2020-09-09 | DBP 200589561 | 13.7 ppb |
| 2020-09-10 | DBP 200589797 | 7.80 ppb |
| 2020-09-10 | DBP 200589799 | 6.30 ppb |
| 2020-09-10 | DBP 200589803 | 11.8 ppb |
| 2020-09-10 | DBP 200589806 | 11.7 ppb |
| 2020-09-11 | DBP 200589868 | 12.8 ppb |
| 2020-12-07 | DBP 200600136 | 13.1 ppb |
| 2020-12-07 | DBP 200600137 | 11.5 ppb |
| 2020-12-08 | DBP 200600326 | 10.00 ppb |
| 2020-12-08 | DBP 200600407 | 10.5 ppb |
| 2020-12-08 | DBP 200600408 | 11.2 ppb |
| 2020-12-09 | DBP 200600562 | 7.60 ppb |
| 2020-12-09 | DBP 200600607 | 8.00 ppb |
| 2020-12-09 | DBP 200600653 | 11.5 ppb |
| 2020-12-09 | DBP 200600656 | 11.6 ppb |
| 2020-12-10 | DBP 200600882 | 9.70 ppb |
| 2020-12-10 | DBP 200600884 | 8.30 ppb |
| 2020-12-10 | DBP 200600884B | 8.30 ppb |
| 2020-12-11 | DBP 200600954 | 9.60 ppb |
| 2021-03-08 | DBP 200608809 | 10.4 ppb |
| 2021-03-08 | DBP 200608835 | 9.60 ppb |
| 2021-03-08 | DBP 200608836 | 11.3 ppb |
| 2021-03-08 | DBP 200608837 | 10.1 ppb |
| 2021-03-09 | DBP 200608914 | 9.10 ppb |
| 2021-03-09 | DBP 200609089 | 12.2 ppb |
| 2021-03-09 | DBP 200609090 | 6.70 ppb |
| 2021-03-09 | DBP 200609093 | 8.10 ppb |
| 2021-03-10 | DBP 200609251 | 8.30 ppb |
| 2021-03-10 | DBP 200609252 | 11.4 ppb |
| 2021-03-11 | DBP 200609420 | 0.800 ppb |
| 2021-03-11 | DBP 200609512 | 10.5 ppb |
| 2021-03-12 | DBP 200609584 | 10.2 ppb |
| 2021-06-07 | DBP 200619680 | 11.1 ppb |
| 2021-06-07 | DBP 200619678 | 12.5 ppb |
| 2021-06-07 | DBP 200619679 | 13.5 ppb |
| 2021-06-08 | DBP 200619800 | 10.9 ppb |
| 2021-06-08 | DBP 200619802 | 11.2 ppb |
| 2021-06-08 | DBP 200619920 | 15.5 ppb |
| 2021-06-08 | DBP 200619921 | 7.30 ppb |
| 2021-06-08 | DBP 200619922 | 8.50 ppb |
| 2021-06-09 | DBP 200620173 | 16.0 ppb |
| 2021-06-10 | DBP 200620493 | 11.9 ppb |
| 2021-06-10 | DBP 200620495 | 10.5 ppb |
| 2021-06-11 | DBP 200620583 | 10.00 ppb |
| 2021-09-13 | 300057530 300057531 | 15.5 ppb |
| 2021-09-13 | 300057533 300057534 | 18.7 ppb |
| 2021-09-13 | 300057536 300057537 | 14.6 ppb |
| 2021-09-14 | 300058253 300058256 | 14.5 ppb |
| 2021-09-14 | 300058258 300058261 | 9.26 ppb |
| 2021-09-14 | 300059322 300059325 | 9.28 ppb |
| 2021-09-14 | 300059327 300059328 | 13.5 ppb |
| 2021-09-14 | 300059398 300059399 | 9.65 ppb |
| 2021-09-15 | 300060630 300060631 | 12.2 ppb |
| 2021-09-16 | 300061467 300061468 | 17.8 ppb |
| 2021-09-16 | 300061470 300061471 | 12.4 ppb |
| 2021-09-17 | 300062097 300062098 | 12.7 ppb |
| 2021-12-13 | D300117139 300117140 | 14.6 ppb |
| 2021-12-13 | D300117142 300117143 | 13.2 ppb |
| 2021-12-13 | D300117145 300117146 | 12.0 ppb |
| 2021-12-13 | D300117148 300117149 | 14.3 ppb |
| 2021-12-13 | D300118224 300118227 | 8.55 ppb |
| 2021-12-13 | D300118229 300118230 | 8.39 ppb |
| 2021-12-14 | D300117272 300117275 | 11.4 ppb |
| 2021-12-14 | D300117277 300117280 | 14.1 ppb |
| 2021-12-15 | D300119211 300119212 | 9.64 ppb |
| 2021-12-16 | D300120051 300120052 | 13.6 ppb |
| 2021-12-16 | D300120054 300120055 | 11.7 ppb |
| 2021-12-17 | D300120678 300120679 | 10.4 ppb |
| 2022-03-07 | D300153474 300153475 | 12.2 ppb |
| 2022-03-07 | D300153477 300153478 | 14.7 ppb |
| 2022-03-07 | D300153480 300153481 | 11.4 ppb |
| 2022-03-08 | D300153988 300153991 | 11.8 ppb |
| 2022-03-08 | D300153993 300153996 | 11.8 ppb |
| 2022-03-08 | D300154252 300154255 | 9.25 ppb |
| 2022-03-08 | D300154257 300154258 | 12.7 ppb |
| 2022-03-08 | D300154260 300154261 | 8.03 ppb |
| 2022-03-09 | D300155008 300155009 | 11.5 ppb |
| 2022-03-10 | D300155239 300155242 | 0.500 ppb |
| 2022-03-10 | D300155826 300155828 | 12.0 ppb |
| 2022-03-10 | D300155831 300155833 | 14.0 ppb |
| 2022-03-11 | D300156650 300156651 | 7.71 ppb |
| 2022-06-06 | D300193482 300193485 | 15.9 ppb |
| 2022-06-06 | D300193487 300193489 | 14.6 ppb |
| 2022-06-06 | D300193491 300193493 | 16.4 ppb |
| 2022-06-06 | D300193495 300193497 | 11.3 ppb |
| 2022-06-07 | D300194485 300194487 | 7.71 ppb |
| 2022-06-07 | D300194421 300194424 | 13.7 ppb |
| 2022-06-07 | D300194474 300194477 | 10.6 ppb |
| 2022-06-08 | D300194960 300194962 | 12.9 ppb |
| 2022-06-08 | D300196206 300196208 | 13.2 ppb |
| 2022-06-08 | D300196210 300196212 | 18.5 ppb |
| 2022-06-08 | D300196214 300196216 | 15.5 ppb |
| 2022-06-10 | D300196552 300196554 | 10.9 ppb |
| 2022-09-12 | D300242309 300242311 | 16.6 ppb |
| 2022-09-12 | D300242313 300242315 | 12.9 ppb |
| 2022-09-13 | D300242867 300242870 | 13.9 ppb |
| 2022-09-13 | D300242872 300242875 | 13.0 ppb |
| 2022-09-13 | D300243354 300243357 | 4.87 ppb |
| 2022-09-13 | D300243359 300243361 | 5.83 ppb |
| 2022-09-14 | D300243943 300243945 | 13.0 ppb |
| 2022-09-14 | D300243947 300243949 | 11.9 ppb |
| 2022-09-14 | D300243951 300243953 | 9.76 ppb |
| 2022-09-15 | D300244400 300244402 | 10.4 ppb |
| 2022-09-15 | D300244404 300244406 | 10.6 ppb |
| 2022-09-15 | D300245400 300245402 | 10.1 ppb |
| 2022-12-05 | D300280513 300280515 | 12.3 ppb |
| 2022-12-05 | D300280517 300280519 | 14.7 ppb |
| 2022-12-05 | D300280521 300280523 | 11.3 ppb |
| 2022-12-06 | D300281387 300281390 | 8.54 ppb |
| 2022-12-06 | D300281392 300281394 | 13.3 ppb |
| 2022-12-06 | D300281396 300281398 | 6.15 ppb |
| 2022-12-07 | D300282133 300282136 | 13.9 ppb |
| 2022-12-07 | D300282138 300282141 | 13.6 ppb |
| 2022-12-07 | D300282730 300282732 | 13.9 ppb |
| 2022-12-08 | D300283547 300283549 | 10.4 ppb |
| 2022-12-08 | D300283566 300283568 | 11.1 ppb |
| 2022-12-09 | D300284348 300284350 | 10.8 ppb |
| 2023-03-06 | D300316509 300316511 | 9.46 ppb |
| 2023-03-06 | D300316513 300316515 | 12.0 ppb |
| 2023-03-06 | D300316517 300316519 | 7.58 ppb |
| 2023-03-07 | D300317097 300317100 | 9.97 ppb |
| 2023-03-07 | D300317102 300317105 | 10.0 ppb |
| 2023-03-07 | D300317505 300317508 | 7.80 ppb |
| 2023-03-07 | D300317510 300317512 | 11.0 ppb |
| 2023-03-07 | D300317514 300317516 | 6.69 ppb |
| 2023-03-08 | D300318389 300318391 | 7.11 ppb |
| 2023-03-08 | D300318393 300318395 | 7.35 ppb |
| 2023-03-09 | D300319243 300319245 | 10.8 ppb |
| 2023-03-10 | D300319398 300319400 | 8.92 ppb |
| 2023-06-05 | D300358943 300358945 | 11.6 ppb |
| 2023-06-05 | D300358947 300358949 | 13.4 ppb |
| 2023-06-05 | D300358951 300358953 | 11.5 ppb |
| 2023-06-05 | D300358955 300358957 | 10.6 ppb |
| 2023-06-06 | D300358988 300358991 | 9.95 ppb |
| 2023-06-06 | D300358993 300358996 | 11.7 ppb |
| 2023-06-06 | D300359847 300359850 | 9.63 ppb |
| 2023-06-06 | D300359852 300359854 | 5.77 ppb |
| 2023-06-07 | D300360865 300360867 | 14.9 ppb |
| 2023-06-08 | D300361983 300361985 | 12.4 ppb |
| 2023-06-08 | D300361987 300361989 | 15.7 ppb |
| 2023-06-09 | D300362721 300362723 | 9.19 ppb |
| 2023-09-11 | D300412854 300412856 | 13.4 ppb |
| 2023-09-11 | D300412858 300412860 | 12.4 ppb |
| 2023-09-12 | D300413093 300413096 | 14.1 ppb |
| 2023-09-12 | D300413098 300413101 | 3.88 ppb |
| 2023-09-12 | D300413568 300413571 | 6.90 ppb |
| 2023-09-12 | D300413573 300413575 | 14.7 ppb |
| 2023-09-12 | D300413577 300413579 | 11.4 ppb |
| 2023-09-12 | D300413581 300413583 | 7.29 ppb |
| 2023-09-13 | D300414470 300414472 | 10.8 ppb |
| 2023-09-13 | D300414474 300414476 | 12.4 ppb |
| 2023-09-14 | D300415299 300415301 | 8.57 ppb |
| 2023-09-15 | D300416083 300416085 | 9.00 ppb |
| 2023-12-04 | D300454311 300454313 | 9.54 ppb |
| 2023-12-04 | D300454315 300454317 | 12.4 ppb |
| 2023-12-04 | D300454322 300454324 | 11.0 ppb |
| 2023-12-05 | D300454448 300454451 | 8.65 ppb |
| 2023-12-05 | D300454453 300454456 | 10.4 ppb |
| 2023-12-05 | D300454954 300454957 | 6.84 ppb |
| 2023-12-05 | D300454962 300454964 | 9.96 ppb |
| 2023-12-05 | D300454972 300454974 | 6.30 ppb |
| 2023-12-06 | D300455828 300455830 | 7.14 ppb |
| 2023-12-06 | D300455832 300455834 | 7.68 ppb |
| 2023-12-07 | D300456845 300456847 | 9.52 ppb |
| 2023-12-08 | D300457513 300457515 | 11.3 ppb |