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EWG's Tap Water Database — 2021 UPDATE

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Trichloroacetic acid

Metropolitan District Commission

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.

MORE ABOUT THIS CONTAMINANT

 

240

Samples

0

Samples exceeding legal limit (MCL)

240

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
201423.2 ppb48486.13 ppb - 46.8 ppb
2015N/A00N/A
201614.4 ppb48486.49 ppb - 25.1 ppb
201715.9 ppb48484.61 ppb - 27.5 ppb
201824.5 ppb48487.40 ppb - 48.9 ppb
201922.9 ppb48481.60 ppb - 43.5 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.1 ppb

The EWG Health Guideline of 0.1 ppb for trichloroacetic acid was proposed in 2020 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.a one-in-a-million lifetime risk of cancer. Values greater than one-in-a-million cancer risk level can result in increased cancer cases above one in a million people.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-03BG16767HAA532.0 ppb
2014-03-03BG16769HAA519.0 ppb
2014-03-04BG16772HAA519.0 ppb
2014-03-04BG16774HAA530.0 ppb
2014-03-05BG16777HAA532.0 ppb
2014-03-05BG16779HAA531.0 ppb
2014-03-05BG16781HAA521.0 ppb
2014-03-05BG16783HAA532.0 ppb
2014-03-06BG16786HAA57.90 ppb
2014-03-06BG16788HAA516.0 ppb
2014-03-07BG16791HAA519.0 ppb
2014-03-07BG16793HAA536.0 ppb
2014-06-16AC68442GE25.1 ppb
2014-06-16AC68443GE25.8 ppb
2014-06-16AC68444GE22.4 ppb
2014-06-16AC68445GE28.8 ppb
2014-06-16AC68446GE24.6 ppb
2014-06-16AC68447GE18.4 ppb
2014-06-16AC68448GE21.6 ppb
2014-06-16AC68449GE18.1 ppb
2014-06-16AC68450GE14.9 ppb
2014-06-16AC68451GE24.5 ppb
2014-06-16AC68452GE7.23 ppb
2014-06-16AC68453GE9.82 ppb
2014-09-08AC77253GE35.0 ppb
2014-09-08AC77257GE20.3 ppb
2014-09-09AC77256GE36.7 ppb
2014-09-09AC77258GE32.5 ppb
2014-09-09AC77263GE34.4 ppb
2014-09-10AC77249GE34.2 ppb
2014-09-10AC77254GE35.7 ppb
2014-09-10AC77255GE38.2 ppb
2014-09-11AC77259GE13.8 ppb
2014-09-11AC77260GE16.5 ppb
2014-09-12AC77250GE46.8 ppb
2014-09-12AC77251GE33.6 ppb
2014-12-01AC84506GE20.3 ppb
2014-12-01AC84510GE15.7 ppb
2014-12-02AC84505GE26.9 ppb
2014-12-02AC84509GE11.7 ppb
2014-12-02AC84511GE16.1 ppb
2014-12-02AC84512GE6.13 ppb
2014-12-03AC84502GE21.8 ppb
2014-12-03AC84503GE17.5 ppb
2014-12-03AC84507GE16.1 ppb
2014-12-03AC84508GE17.5 ppb
2014-12-04AC84513GE12.8 ppb
2014-12-05AC84504GE14.8 ppb
2016-02-29AD24009GE25.1 ppb
2016-02-29AD24010GE17.6 ppb
2016-02-29AD24014GE19.3 ppb
2016-02-29AD24015GE12.6 ppb
2016-03-01AD24016GE6.49 ppb
2016-03-01AD24013GE11.5 ppb
2016-03-02AD24011GE14.8 ppb
2016-03-02AD24012GE16.7 ppb
2016-03-02AD24006GE22.1 ppb
2016-03-02AD24007GE21.5 ppb
2016-03-03AD24017GE10.7 ppb
2016-03-04AD24008GE11.9 ppb
2016-05-30AD32107GE18.8 ppb
2016-05-30AD32112GE20.0 ppb
2016-05-31AD32110GE17.8 ppb
2016-05-31AD32111GE14.0 ppb
2016-05-31AD32106GE22.4 ppb
2016-06-01AD32103GE24.7 ppb
2016-06-01AD32104GE21.5 ppb
2016-06-01AD32108GE18.3 ppb
2016-06-01AD32109GE23.0 ppb
2016-06-02AD32113GE7.72 ppb
2016-06-02AD32114GE10.5 ppb
2016-06-03AD32105GE17.9 ppb
2016-09-12AD41846GE15.0 ppb
2016-09-12AD41850GE10.2 ppb
2016-09-13AD41849GE14.3 ppb
2016-09-13AD41851GE16.3 ppb
2016-09-13AD41845GE20.3 ppb
2016-09-14AD41842GE13.9 ppb
2016-09-14AD41843GE20.5 ppb
2016-09-14AD41847GE11.9 ppb
2016-09-14AD41848GE16.8 ppb
2016-09-15AD41852GE9.88 ppb
2016-09-15AD41853GE11.3 ppb
2016-09-16AD41844GE15.2 ppb
2016-12-05AD49848GE8.50 ppb
2016-12-05AD49844GE9.38 ppb
2016-12-06AD49843GE14.0 ppb
2016-12-06AD49847GE7.15 ppb
2016-12-06AD49849GE8.15 ppb
2016-12-07AD49840GE10.7 ppb
2016-12-07AD49841GE9.11 ppb
2016-12-07AD49845GE10.2 ppb
2016-12-07AD49846GE9.71 ppb
2016-12-08AD49850GE6.74 ppb
2016-12-09AD49851GE9.74 ppb
2016-12-09AD49842GE7.66 ppb
2017-03-06AD57226GE10.9 ppb
2017-03-06AD57222GE14.7 ppb
2017-03-07AD57227GE13.5 ppb
2017-03-07AD57221GE22.5 ppb
2017-03-07AD57225GE9.08 ppb
2017-03-08AD57223GE16.7 ppb
2017-03-08AD57224GE13.8 ppb
2017-03-08AD57218GE19.7 ppb
2017-03-08AD57219GE17.7 ppb
2017-03-09AD57228GE6.09 ppb
2017-03-09AD57229GE10.7 ppb
2017-03-10AD57220GE11.4 ppb
2017-06-12AD65857GE20.3 ppb
2017-06-12AD65861GE9.74 ppb
2017-06-13AD65856GE19.7 ppb
2017-06-13AD65862GE15.4 ppb
2017-06-14AD65858GE13.3 ppb
2017-06-14AD65859GE20.9 ppb
2017-06-14AD65853GE20.8 ppb
2017-06-14AD65854GE24.1 ppb
2017-06-15AD65860GE14.2 ppb
2017-06-15AD65863GE5.71 ppb
2017-06-15AD65864GE7.98 ppb
2017-06-16AD65855GE15.3 ppb
2017-09-12AD74745GE27.5 ppb
2017-09-12AD74746GE19.5 ppb
2017-09-12AD74749GE11.8 ppb
2017-09-12AD74750GE15.5 ppb
2017-09-12AD74751GE18.6 ppb
2017-09-13AD74747GE21.8 ppb
2017-09-13AD74748GE19.2 ppb
2017-09-13AD74742GE9.76 ppb
2017-09-13AD74743GE23.9 ppb
2017-09-14AD74752GE7.87 ppb
2017-09-14AD74753GE10.4 ppb
2017-09-15AD74744GE19.6 ppb
2017-12-04AD82362GE20.9 ppb
2017-12-04AD82366GE12.6 ppb
2017-12-05AD82367GE18.9 ppb
2017-12-05AD82361GE22.7 ppb
2017-12-05AD82365GE16.4 ppb
2017-12-06AD82363GE19.9 ppb
2017-12-06AD82364GE19.6 ppb
2017-12-06AD82358GE21.7 ppb
2017-12-06AD82359GE20.9 ppb
2017-12-07AD82368GE4.61 ppb
2017-12-07AD82369GE9.96 ppb
2017-12-08AD82360GE16.8 ppb
2018-03-05AD89780GE25.0 ppb
2018-03-05AD89784GE20.0 ppb
2018-03-06AD89785GE20.0 ppb
2018-03-06AD89781GE22.0 ppb
2018-03-06AD89782GE20.0 ppb
2018-03-06AD89783GE14.0 ppb
2018-03-06AD89776GE25.0 ppb
2018-03-06AD89777GE25.0 ppb
2018-03-06AD89779GE34.0 ppb
2018-03-08AD89786GE9.50 ppb
2018-03-08AD89787GE13.0 ppb
2018-03-09AD89778GE20.0 ppb
2018-06-11DBP 20049771715.7 ppb
2018-06-11DBP 20049771628.2 ppb
2018-06-12DBP 20049771819.4 ppb
2018-06-12DBP 20049771923.6 ppb
2018-06-12DBP 20049772031.1 ppb
2018-06-13DBP 20049772130.2 ppb
2018-06-13DBP 20049772224.8 ppb
2018-06-13DBP 20049772321.1 ppb
2018-06-13DBP 20049772426.6 ppb
2018-06-14DBP 2004977257.40 ppb
2018-06-14DBP 20049772611.7 ppb
2018-06-15DBP 20049772718.6 ppb
2018-09-05AE06391GE26.0 ppb
2018-09-05AE06392GE34.1 ppb
2018-09-05AE06396GE26.4 ppb
2018-09-05AE06397GE30.9 ppb
2018-09-06AE06394GE28.2 ppb
2018-09-06AE06399GE18.4 ppb
2018-09-06AE06400GE25.1 ppb
2018-09-06AE06401GE10.7 ppb
2018-09-06AE06402GE10.5 ppb
2018-09-07AE06395GE26.3 ppb
2018-09-07AE06393GE23.7 ppb
2018-09-07AE06398GE25.0 ppb
2018-12-03AE14329GE40.7 ppb
2018-12-03AE14330GE38.3 ppb
2018-12-03AE14334GE24.9 ppb
2018-12-04AE14333GE26.5 ppb
2018-12-04AE14335GE41.2 ppb
2018-12-05AE14326GE28.7 ppb
2018-12-05AE14327GE40.9 ppb
2018-12-05AE14331GE48.9 ppb
2018-12-05AE14332GE37.2 ppb
2018-12-06AE14336GE10.9 ppb
2018-12-06AE14337GE17.1 ppb
2018-12-07AE14328GE29.9 ppb
2019-03-11AE22324GE32.1 ppb
2019-03-11AE22328GE24.1 ppb
2019-03-12AE22327GE23.1 ppb
2019-03-12AE22329GE35.6 ppb
2019-03-12AE22323GE43.5 ppb
2019-03-13AE22320GE37.3 ppb
2019-03-13AE22321GE40.5 ppb
2019-03-13AE22325GE42.4 ppb
2019-03-13AE22326GE32.6 ppb
2019-03-14AE22330GE8.58 ppb
2019-03-14AE22331GE13.5 ppb
2019-03-15AE22322GE26.9 ppb
2019-06-03AE30192GE38.6 ppb
2019-06-03AE30196GE21.1 ppb
2019-06-04AE30197GE26.6 ppb
2019-06-04AE30191GE40.9 ppb
2019-06-04AE30195GE26.2 ppb
2019-06-05AE30188GE15.9 ppb
2019-06-05AE30189GE40.9 ppb
2019-06-05AE30193GE34.4 ppb
2019-06-05AE30194GE32.2 ppb
2019-06-06AE30198GE9.18 ppb
2019-06-06AE30199GE11.7 ppb
2019-06-07AE30190GE24.0 ppb
2019-09-09DBP 20054882521.9 ppb
2019-09-09DBP 20054882615.5 ppb
2019-09-10DBP 20054882724.8 ppb
2019-09-10DBP 20054882924.3 ppb
2019-09-10DBP 20054882822.6 ppb
2019-09-10DBP 20054883021.2 ppb
2019-09-11DBP 20054883125.4 ppb
2019-09-11DBP 20054883225.5 ppb
2019-09-11DBP 2005488331.60 ppb
2019-09-12DBP 2005488349.60 ppb
2019-09-12DBP 20054883511.7 ppb
2019-09-13DBP 20054883623.4 ppb
2019-12-02DBP 20055925613.7 ppb
2019-12-02DBP 20055925518.8 ppb
2019-12-03DBP 20055925713.1 ppb
2019-12-03DBP 20055925816.7 ppb
2019-12-03DBP 20055925920.2 ppb
2019-12-04DBP 20055926018.2 ppb
2019-12-04DBP 20055926119.3 ppb
2019-12-04DBP 20055926220.4 ppb
2019-12-04DBP 20055926318.2 ppb
2019-12-05DBP 2005592646.90 ppb
2019-12-05DBP 20055926512.4 ppb
2019-12-06DBP 20055926612.8 ppb