Know Your Environment. Protect Your Health.

Trichloroacetic acid

Regional Water Authority

Trichloroacetic 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.

 

292

Samples

0

Samples exceeding legal limit (MCL)

289

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
201824.8 ppb48489.80 ppb - 45.3 ppb
201917.1 ppb48489.20 ppb - 26.4 ppb
202016.1 ppb5049ND - 25.3 ppb
202116.9 ppb4948ND - 28.7 ppb
202217.9 ppb4948ND - 26.6 ppb
202316.4 ppb48488.69 ppb - 28.0 ppb

ppb = parts per billion

State, National, and Health Guidelines for Drinking Water

EWG Health Guideline: 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic 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
2018-03-06DBP 20048926836.3 ppb
2018-03-06DBP 20048927545.3 ppb
2018-03-06DBP 20048928738.7 ppb
2018-03-07DBP 20048953717.6 ppb
2018-03-07DBP 20048953837.6 ppb
2018-03-07DBP 20048953938.7 ppb
2018-03-07DBP 20048954039.9 ppb
2018-03-07DBP 20048954134.2 ppb
2018-03-08DBP 20048956515.0 ppb
2018-03-09DBP 20048970138.1 ppb
2018-03-09DBP 20048970239.7 ppb
2018-03-09DBP 20048970328.9 ppb
2018-06-05DBP 20049598422.0 ppb
2018-06-05DBP 20049598923.4 ppb
2018-06-05DBP 20049600223.6 ppb
2018-06-06DBP 20049623521.9 ppb
2018-06-07DBP 20049637521.1 ppb
2018-06-07DBP 20049637625.5 ppb
2018-06-07DBP 20049641713.5 ppb
2018-06-08DBP 20049650727.1 ppb
2018-06-08DBP 20049650823.9 ppb
2018-06-08DBP 20049650924.4 ppb
2018-06-08DBP 20049651027.1 ppb
2018-06-08DBP 20049651124.8 ppb
2018-09-04DBP 20050373221.4 ppb
2018-09-04DBP 20050373722.6 ppb
2018-09-04DBP 20050384220.6 ppb
2018-09-04DBP 20050391223.8 ppb
2018-09-04DBP 20050391324.6 ppb
2018-09-04DBP 20050391422.8 ppb
2018-09-05DBP 20050398118.9 ppb
2018-09-05DBP 20050408618.0 ppb
2018-09-05DBP 20050408712.5 ppb
2018-09-06DBP 2005041859.80 ppb
2018-09-06DBP 20050421120.8 ppb
2018-09-07DBP 20050444122.4 ppb
2018-12-03DBP 20051437210.5 ppb
2018-12-03DBP 20051440622.7 ppb
2018-12-04DBP 20051444722.2 ppb
2018-12-04DBP 20051445223.5 ppb
2018-12-04DBP 20051462525.3 ppb
2018-12-04DBP 20051462619.5 ppb
2018-12-04DBP 20051462723.6 ppb
2018-12-04DBP 20051462822.5 ppb
2018-12-04DBP 20051462921.2 ppb
2018-12-05DBP 20051495221.6 ppb
2018-12-06DBP 20051506921.6 ppb
2018-12-06DBP 20051507027.9 ppb
2019-03-04DBP 20052321513.8 ppb
2019-03-04DBP 20052321718.7 ppb
2019-03-05DBP 20052326216.9 ppb
2019-03-05DBP 20052326918.4 ppb
2019-03-05DBP 20052345619.0 ppb
2019-03-05DBP 20052345726.4 ppb
2019-03-05DBP 20052345818.6 ppb
2019-03-05DBP 20052345917.1 ppb
2019-03-05DBP 2005234639.50 ppb
2019-03-07DBP 20052388417.3 ppb
2019-03-08DBP 20052400014.1 ppb
2019-03-08DBP 20052400220.6 ppb
2019-06-03DBP 20053437315.8 ppb
2019-06-03DBP 20053441411.8 ppb
2019-06-04DBP 20053449114.2 ppb
2019-06-04DBP 20053449615.1 ppb
2019-06-04DBP 20053460015.9 ppb
2019-06-04DBP 20053472512.9 ppb
2019-06-04DBP 20053472717.4 ppb
2019-06-04DBP 20053472920.1 ppb
2019-06-05DBP 20053503918.7 ppb
2019-06-05DBP 20053504115.9 ppb
2019-06-06DBP 20053519715.9 ppb
2019-06-07DBP 20053535715.8 ppb
2019-09-03DBP 20054698819.4 ppb
2019-09-03DBP 20054699319.4 ppb
2019-09-04DBP 2005474009.50 ppb
2019-09-04DBP 20054740222.3 ppb
2019-09-04DBP 20054740321.5 ppb
2019-09-04DBP 20054740418.2 ppb
2019-09-04DBP 20054740519.6 ppb
2019-09-05DBP 2005474609.20 ppb
2019-09-05DBP 20054766721.6 ppb
2019-09-06DBP 20054782621.1 ppb
2019-09-06DBP 20054782721.3 ppb
2019-09-06DBP 20054782820.1 ppb
2019-12-02DBP 20055840521.3 ppb
2019-12-02DBP 20055840617.7 ppb
2019-12-02DBP 20055840718.5 ppb
2019-12-03DBP 20055845416.4 ppb
2019-12-03DBP 20055845918.0 ppb
2019-12-03DBP 20055861217.9 ppb
2019-12-04DBP 20055891616.2 ppb
2019-12-04DBP 20055891716.9 ppb
2019-12-04DBP 2005589199.20 ppb
2019-12-05DBP 20055907316.6 ppb
2019-12-05DBP 20055909814.8 ppb
2019-12-06DBP 20055919515.8 ppb
2020-03-02DBP 20056771321.3 ppb
2020-03-02DBP 20056771425.3 ppb
2020-03-02DBP 20056771524.0 ppb
2020-03-02DBP 20056771819.3 ppb
2020-03-03DBP 20056778019.9 ppb
2020-03-03DBP 20056778722.8 ppb
2020-03-03DBP 20056792014.6 ppb
2020-03-03DBP 20056792118.3 ppb
2020-03-04DBP 20056817720.8 ppb
2020-03-04DBP 20056817819.5 ppb
2020-03-05DBP 200568285ND
2020-03-05DBP 20056838418.6 ppb
2020-03-12DBP 20056916419.0 ppb
2020-06-01DBP 20057726418.2 ppb
2020-06-01DBP 20057726521.3 ppb
2020-06-01DBP 20057726618.4 ppb
2020-06-02DBP 20057731816.7 ppb
2020-06-02DBP 20057732716.2 ppb
2020-06-02DBP 20057739920.0 ppb
2020-06-02DBP 20057740111.7 ppb
2020-06-03DBP 20057771910.4 ppb
2020-06-03DBP 20057772120.2 ppb
2020-06-04DBP 20057795415.7 ppb
2020-06-04DBP 20057795516.4 ppb
2020-06-05DBP 20057807712.6 ppb
2020-09-08DBP 20058910917.5 ppb
2020-09-08DBP 20058911817.7 ppb
2020-09-08DBP 20058925219.0 ppb
2020-09-08DBP 20058925319.5 ppb
2020-09-08DBP 2005892547.50 ppb
2020-09-09DBP 20058956019.3 ppb
2020-09-09DBP 20058956119.1 ppb
2020-09-10DBP 20058979717.1 ppb
2020-09-10DBP 2005897996.30 ppb
2020-09-10DBP 20058980318.1 ppb
2020-09-10DBP 20058980616.6 ppb
2020-09-11DBP 20058986812.6 ppb
2020-12-07DBP 20060013616.7 ppb
2020-12-07DBP 20060013714.4 ppb
2020-12-08DBP 20060032612.4 ppb
2020-12-08DBP 20060040713.5 ppb
2020-12-08DBP 20060040815.1 ppb
2020-12-09DBP 2006005629.60 ppb
2020-12-09DBP 20060060711.7 ppb
2020-12-09DBP 20060065315.3 ppb
2020-12-09DBP 20060065615.5 ppb
2020-12-10DBP 20060088214.3 ppb
2020-12-10DBP 20060088412.4 ppb
2020-12-10DBP 200600884B12.4 ppb
2020-12-11DBP 20060095412.2 ppb
2021-03-08DBP 20060880916.5 ppb
2021-03-08DBP 20060883515.4 ppb
2021-03-08DBP 20060883617.7 ppb
2021-03-08DBP 20060883715.8 ppb
2021-03-09DBP 20060891414.6 ppb
2021-03-09DBP 20060908919.7 ppb
2021-03-09DBP 20060909011.2 ppb
2021-03-09DBP 20060909313.2 ppb
2021-03-10DBP 20060925113.9 ppb
2021-03-10DBP 20060925219.0 ppb
2021-03-11DBP 200609420ND
2021-03-11DBP 20060951216.9 ppb
2021-03-12DBP 20060958415.8 ppb
2021-06-07DBP 20061968015.5 ppb
2021-06-07DBP 20061967817.2 ppb
2021-06-07DBP 20061967918.0 ppb
2021-06-08DBP 20061980016.6 ppb
2021-06-08DBP 20061980217.3 ppb
2021-06-08DBP 20061992022.0 ppb
2021-06-08DBP 2006199218.60 ppb
2021-06-08DBP 2006199229.40 ppb
2021-06-09DBP 20062017321.4 ppb
2021-06-10DBP 20062049317.7 ppb
2021-06-10DBP 20062049516.0 ppb
2021-06-11DBP 20062058312.1 ppb
2021-09-13300057530 30005753121.1 ppb
2021-09-13300057533 30005753422.9 ppb
2021-09-13300057536 30005753728.7 ppb
2021-09-14300058253 30005825622.0 ppb
2021-09-14300058258 30005826122.2 ppb
2021-09-14300059322 30005932511.3 ppb
2021-09-14300059327 30005932819.8 ppb
2021-09-14300059398 30005939910.9 ppb
2021-09-15300060630 30006063120.5 ppb
2021-09-16300061467 30006146823.5 ppb
2021-09-16300061470 30006147120.3 ppb
2021-09-17300062097 30006209814.6 ppb
2021-12-13D300117139 30011714021.3 ppb
2021-12-13D300117142 30011714319.3 ppb
2021-12-13D300117145 30011714617.7 ppb
2021-12-13D300117148 30011714921.8 ppb
2021-12-13D300118224 30011822711.8 ppb
2021-12-13D300118229 30011823011.5 ppb
2021-12-14D300117272 30011727517.6 ppb
2021-12-14D300117277 30011728020.4 ppb
2021-12-15D300119211 30011921215.6 ppb
2021-12-16D300120051 30012005220.5 ppb
2021-12-16D300120054 30012005518.3 ppb
2021-12-17D300120678 30012067912.8 ppb
2022-03-07D300153474 30015347520.4 ppb
2022-03-07D300153477 30015347823.8 ppb
2022-03-07D300153480 30015348119.0 ppb
2022-03-08D300153988 30015399120.2 ppb
2022-03-08D300153993 30015399622.4 ppb
2022-03-08D300154252 30015425515.0 ppb
2022-03-08D300154257 30015425820.1 ppb
2022-03-08D300154260 30015426113.0 ppb
2022-03-09D300155008 30015500918.3 ppb
2022-03-10D300155239 300155242ND
2022-03-10D300155826 30015582818.3 ppb
2022-03-10D300155831 30015583320.3 ppb
2022-03-11D300156650 30015665111.8 ppb
2022-06-06D300193482 30019348523.5 ppb
2022-06-06D300193487 30019348920.0 ppb
2022-06-06D300193491 30019349323.2 ppb
2022-06-06D300193495 30019349715.8 ppb
2022-06-07D300194485 3001944879.55 ppb
2022-06-07D300194421 30019442422.7 ppb
2022-06-07D300194474 30019447712.1 ppb
2022-06-08D300194960 30019496221.8 ppb
2022-06-08D300196206 30019620822.7 ppb
2022-06-08D300196210 30019621226.6 ppb
2022-06-08D300196214 30019621624.4 ppb
2022-06-10D300196552 30019655414.3 ppb
2022-09-12D300242309 30024231123.7 ppb
2022-09-12D300242313 30024231520.8 ppb
2022-09-13D300242867 30024287021.2 ppb
2022-09-13D300242872 30024287521.3 ppb
2022-09-13D300243354 3002433576.59 ppb
2022-09-13D300243359 3002433615.71 ppb
2022-09-14D300243943 30024394519.4 ppb
2022-09-14D300243947 30024394917.7 ppb
2022-09-14D300243951 30024395319.4 ppb
2022-09-15D300244400 30024440217.9 ppb
2022-09-15D300244404 30024440618.2 ppb
2022-09-15D300245400 30024540210.4 ppb
2022-12-05D300280513 30028051518.3 ppb
2022-12-05D300280517 30028051922.9 ppb
2022-12-05D300280521 30028052316.8 ppb
2022-12-06D300281387 30028139011.8 ppb
2022-12-06D300281392 30028139420.0 ppb
2022-12-06D300281396 3002813989.94 ppb
2022-12-07D300282133 30028213621.3 ppb
2022-12-07D300282138 30028214120.5 ppb
2022-12-07D300282730 30028273221.7 ppb
2022-12-08D300283547 30028354917.6 ppb
2022-12-08D300283566 30028356818.2 ppb
2022-12-09D300284348 30028435014.5 ppb
2023-03-06D300316509 30031651116.6 ppb
2023-03-06D300316513 30031651519.0 ppb
2023-03-06D300316517 30031651912.6 ppb
2023-03-07D300317097 30031710016.6 ppb
2023-03-07D300317102 30031710516.7 ppb
2023-03-07D300317505 30031750813.0 ppb
2023-03-07D300317510 30031751218.6 ppb
2023-03-07D300317514 30031751611.6 ppb
2023-03-08D300318389 30031839113.6 ppb
2023-03-08D300318393 30031839514.4 ppb
2023-03-09D300319243 30031924516.5 ppb
2023-03-10D300319398 30031940014.3 ppb
2023-06-05D300358943 30035894517.7 ppb
2023-06-05D300358947 30035894920.0 ppb
2023-06-05D300358951 30035895317.5 ppb
2023-06-05D300358955 30035895715.5 ppb
2023-06-06D300358988 30035899115.8 ppb
2023-06-06D300358993 30035899617.3 ppb
2023-06-06D300359847 30035985011.1 ppb
2023-06-06D300359852 3003598548.69 ppb
2023-06-07D300360865 30036086721.7 ppb
2023-06-08D300361983 30036198519.1 ppb
2023-06-08D300361987 30036198921.1 ppb
2023-06-09D300362721 30036272312.7 ppb
2023-09-11D300412854 30041285628.0 ppb
2023-09-11D300412858 30041286021.0 ppb
2023-09-12D300413093 30041309621.4 ppb
2023-09-12D300413098 30041310122.7 ppb
2023-09-12D300413568 30041357110.3 ppb
2023-09-12D300413573 30041357522.6 ppb
2023-09-12D300413577 30041357919.1 ppb
2023-09-12D300413581 3004135839.20 ppb
2023-09-13D300414470 30041447219.5 ppb
2023-09-13D300414474 30041447621.2 ppb
2023-09-14D300415299 30041530124.2 ppb
2023-09-15D300416083 30041608511.9 ppb
2023-12-04D300454311 30045431315.5 ppb
2023-12-04D300454315 30045431718.2 ppb
2023-12-04D300454322 30045432417.6 ppb
2023-12-05D300454448 30045445114.2 ppb
2023-12-05D300454453 30045445616.6 ppb
2023-12-05D300454954 3004549579.93 ppb
2023-12-05D300454962 30045496415.8 ppb
2023-12-05D300454972 3004549749.29 ppb
2023-12-06D300455828 30045583012.3 ppb
2023-12-06D300455832 30045583413.4 ppb
2023-12-07D300456845 30045684716.6 ppb
2023-12-08D300457513 30045751517.1 ppb