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EWG's Tap Water Database — 2021 UPDATE

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Dichloroacetic acid

Metropolitan District Commission

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.

MORE ABOUT THIS CONTAMINANT

 

240

Samples

0

Samples exceeding legal limit (MCL)

236

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20148.49 ppb48482.10 ppb - 17.9 ppb
2015N/A00N/A
20167.10 ppb4847ND - 16.3 ppb
20175.88 ppb4846ND - 14.1 ppb
20189.70 ppb48482.05 ppb - 20.4 ppb
20198.93 ppb4847ND - 26.8 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 0.2 ppb

The EWG Health Guideline of 0.2 ppb for dichloroacetic 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
2014-03-03BG16767HAA512.0 ppb
2014-03-03BG16769HAA59.60 ppb
2014-03-04BG16772HAA512.0 ppb
2014-03-04BG16774HAA516.0 ppb
2014-03-05BG16777HAA517.0 ppb
2014-03-05BG16779HAA511.0 ppb
2014-03-05BG16781HAA514.0 ppb
2014-03-05BG16783HAA58.70 ppb
2014-03-06BG16786HAA56.50 ppb
2014-03-06BG16788HAA56.50 ppb
2014-03-07BG16791HAA513.0 ppb
2014-03-07BG16793HAA59.60 ppb
2014-06-16AC68442GE2.89 ppb
2014-06-16AC68443GE17.9 ppb
2014-06-16AC68444GE16.4 ppb
2014-06-16AC68445GE2.52 ppb
2014-06-16AC68446GE4.15 ppb
2014-06-16AC68447GE15.4 ppb
2014-06-16AC68448GE6.97 ppb
2014-06-16AC68449GE14.4 ppb
2014-06-16AC68450GE6.66 ppb
2014-06-16AC68451GE16.5 ppb
2014-06-16AC68452GE7.40 ppb
2014-06-16AC68453GE4.97 ppb
2014-09-08AC77253GE3.13 ppb
2014-09-08AC77257GE9.78 ppb
2014-09-09AC77256GE12.6 ppb
2014-09-09AC77258GE6.56 ppb
2014-09-09AC77263GE2.10 ppb
2014-09-10AC77249GE2.78 ppb
2014-09-10AC77254GE15.4 ppb
2014-09-10AC77255GE8.74 ppb
2014-09-11AC77259GE10.2 ppb
2014-09-11AC77260GE5.09 ppb
2014-09-12AC77250GE2.51 ppb
2014-09-12AC77251GE15.4 ppb
2014-12-01AC84506GE3.13 ppb
2014-12-01AC84510GE3.10 ppb
2014-12-02AC84505GE2.11 ppb
2014-12-02AC84509GE9.79 ppb
2014-12-02AC84511GE6.08 ppb
2014-12-02AC84512GE4.87 ppb
2014-12-03AC84502GE3.28 ppb
2014-12-03AC84503GE2.42 ppb
2014-12-03AC84507GE8.62 ppb
2014-12-03AC84508GE5.84 ppb
2014-12-04AC84513GE2.74 ppb
2014-12-05AC84504GE9.49 ppb
2016-02-29AD24009GE13.8 ppb
2016-02-29AD24010GE11.8 ppb
2016-02-29AD24014GE10.1 ppb
2016-02-29AD24015GE11.8 ppb
2016-03-01AD24013GE10.2 ppb
2016-03-01AD24016GE5.54 ppb
2016-03-02AD24006GE10.4 ppb
2016-03-02AD24007GE15.7 ppb
2016-03-02AD24011GE11.7 ppb
2016-03-02AD24012GE10.9 ppb
2016-03-03AD24017GE4.98 ppb
2016-03-04AD24008GE9.93 ppb
2016-05-30AD32107GE5.49 ppb
2016-05-30AD32112GE13.5 ppb
2016-05-31AD32110GE13.9 ppb
2016-05-31AD32111GE6.69 ppb
2016-05-31AD32106GE3.93 ppb
2016-06-01AD32108GE13.5 ppb
2016-06-01AD32109GE8.04 ppb
2016-06-01AD32103GE3.74 ppb
2016-06-01AD32104GE16.3 ppb
2016-06-02AD32113GE7.56 ppb
2016-06-02AD32114GE5.47 ppb
2016-06-03AD32105GE12.8 ppb
2016-09-12AD41846GE2.32 ppb
2016-09-12AD41850GE8.25 ppb
2016-09-13AD41851GE5.42 ppb
2016-09-13AD41845GE3.07 ppb
2016-09-13AD41849GE7.23 ppb
2016-09-14AD41847GE7.84 ppb
2016-09-14AD41848GE6.20 ppb
2016-09-14AD41842GE2.33 ppb
2016-09-14AD41843GE1.84 ppb
2016-09-15AD41852GE9.89 ppb
2016-09-15AD41853GE2.86 ppb
2016-09-16AD41844GE8.89 ppb
2016-12-05AD49844GE1.54 ppb
2016-12-05AD49848GE4.31 ppb
2016-12-06AD49849GE3.18 ppb
2016-12-06AD49843GE1.20 ppb
2016-12-06AD49847GE5.07 ppb
2016-12-07AD49845GE2.45 ppb
2016-12-07AD49846GE5.52 ppb
2016-12-07AD49840GE1.20 ppb
2016-12-07AD49841GE1.82 ppb
2016-12-08AD49850GE5.95 ppb
2016-12-09AD49851GEND
2016-12-09AD49842GE4.72 ppb
2017-03-06AD57222GE6.25 ppb
2017-03-06AD57226GE7.46 ppb
2017-03-07AD57227GE8.44 ppb
2017-03-07AD57221GE10.3 ppb
2017-03-07AD57225GE5.86 ppb
2017-03-08AD57218GE8.49 ppb
2017-03-08AD57219GE10.1 ppb
2017-03-08AD57223GE10.7 ppb
2017-03-08AD57224GE6.55 ppb
2017-03-09AD57228GE5.76 ppb
2017-03-09AD57229GE4.67 ppb
2017-03-10AD57220GE6.58 ppb
2017-06-12AD65857GE1.34 ppb
2017-06-12AD65861GE7.36 ppb
2017-06-13AD65862GE9.77 ppb
2017-06-13AD65856GEND
2017-06-14AD65853GE1.46 ppb
2017-06-14AD65854GE14.1 ppb
2017-06-14AD65858GE10.3 ppb
2017-06-14AD65859GE5.21 ppb
2017-06-15AD65863GE5.81 ppb
2017-06-15AD65864GE3.19 ppb
2017-06-15AD65860GE9.99 ppb
2017-06-16AD65855GE8.58 ppb
2017-09-12AD74745GE3.55 ppb
2017-09-12AD74746GE2.02 ppb
2017-09-12AD74749GE10.1 ppb
2017-09-12AD74750GE3.94 ppb
2017-09-12AD74751GE5.26 ppb
2017-09-13AD74747GE10.6 ppb
2017-09-13AD74748GE5.46 ppb
2017-09-13AD74742GE1.43 ppb
2017-09-13AD74743GE2.05 ppb
2017-09-14AD74752GE6.51 ppb
2017-09-14AD74753GE2.25 ppb
2017-09-15AD74744GE9.20 ppb
2017-12-04AD82362GE2.10 ppb
2017-12-04AD82366GE3.09 ppb
2017-12-05AD82367GE8.13 ppb
2017-12-05AD82361GE1.94 ppb
2017-12-05AD82365GE9.20 ppb
2017-12-06AD82363GE6.00 ppb
2017-12-06AD82364GE4.05 ppb
2017-12-06AD82358GE1.64 ppb
2017-12-06AD82359GE1.97 ppb
2017-12-07AD82368GE3.09 ppb
2017-12-07AD82369GEND
2017-12-08AD82360GE10.4 ppb
2018-03-05AD89780GE8.50 ppb
2018-03-05AD89784GE16.0 ppb
2018-03-06AD89779GE13.0 ppb
2018-03-06AD89785GE12.0 ppb
2018-03-06AD89776GE12.0 ppb
2018-03-06AD89777GE15.0 ppb
2018-03-06AD89781GE16.0 ppb
2018-03-06AD89782GE9.50 ppb
2018-03-06AD89783GE11.0 ppb
2018-03-08AD89786GE10.00 ppb
2018-03-08AD89787GE6.40 ppb
2018-03-09AD89778GE14.0 ppb
2018-06-11DBP 2004977178.70 ppb
2018-06-11DBP 2004977163.70 ppb
2018-06-12DBP 20049771815.8 ppb
2018-06-12DBP 20049771914.9 ppb
2018-06-12DBP 2004977202.60 ppb
2018-06-13DBP 20049772119.9 ppb
2018-06-13DBP 20049772210.7 ppb
2018-06-13DBP 20049772315.2 ppb
2018-06-13DBP 2004977242.60 ppb
2018-06-14DBP 2004977257.70 ppb
2018-06-14DBP 2004977263.80 ppb
2018-06-15DBP 20049772714.3 ppb
2018-09-05AE06391GE2.06 ppb
2018-09-05AE06392GE2.73 ppb
2018-09-05AE06396GE13.5 ppb
2018-09-05AE06397GE10.9 ppb
2018-09-06AE06399GE6.83 ppb
2018-09-06AE06400GE9.21 ppb
2018-09-06AE06401GE11.2 ppb
2018-09-06AE06402GE2.20 ppb
2018-09-06AE06394GE5.35 ppb
2018-09-07AE06395GE3.60 ppb
2018-09-07AE06398GE10.4 ppb
2018-09-07AE06393GE14.7 ppb
2018-12-03AE14329GE4.01 ppb
2018-12-03AE14330GE4.32 ppb
2018-12-03AE14334GE12.9 ppb
2018-12-04AE14335GE13.8 ppb
2018-12-04AE14333GE19.4 ppb
2018-12-05AE14326GE5.01 ppb
2018-12-05AE14327GE6.70 ppb
2018-12-05AE14331GE3.86 ppb
2018-12-05AE14332GE8.23 ppb
2018-12-06AE14336GE8.81 ppb
2018-12-06AE14337GE2.05 ppb
2018-12-07AE14328GE20.4 ppb
2019-03-11AE22328GE17.7 ppb
2019-03-11AE22324GE6.50 ppb
2019-03-12AE22327GE18.2 ppb
2019-03-12AE22329GE22.9 ppb
2019-03-12AE22323GE7.74 ppb
2019-03-13AE22320GE6.82 ppb
2019-03-13AE22321GE24.9 ppb
2019-03-13AE22325GE26.8 ppb
2019-03-13AE22326GE13.8 ppb
2019-03-14AE22330GE7.12 ppb
2019-03-14AE22331GE6.83 ppb
2019-03-15AE22322GE17.6 ppb
2019-06-03AE30192GE3.22 ppb
2019-06-03AE30196GE7.48 ppb
2019-06-04AE30191GE1.47 ppb
2019-06-04AE30195GE17.8 ppb
2019-06-04AE30197GE9.97 ppb
2019-06-05AE30193GE18.6 ppb
2019-06-05AE30194GE8.12 ppb
2019-06-05AE30188GEND
2019-06-05AE30189GE26.3 ppb
2019-06-06AE30198GE9.29 ppb
2019-06-06AE30199GE3.35 ppb
2019-06-07AE30190GE17.4 ppb
2019-09-09DBP 2005488252.00 ppb
2019-09-09DBP 2005488265.10 ppb
2019-09-10DBP 2005488278.80 ppb
2019-09-10DBP 2005488293.80 ppb
2019-09-10DBP 2005488281.80 ppb
2019-09-10DBP 20054883014.5 ppb
2019-09-11DBP 2005488315.90 ppb
2019-09-11DBP 2005488328.40 ppb
2019-09-11DBP 2005488330.800 ppb
2019-09-12DBP 2005488348.70 ppb
2019-09-12DBP 2005488351.10 ppb
2019-09-13DBP 2005488369.40 ppb
2019-12-02DBP 2005592563.80 ppb
2019-12-02DBP 2005592553.30 ppb
2019-12-03DBP 2005592579.00 ppb
2019-12-03DBP 2005592585.40 ppb
2019-12-03DBP 2005592591.50 ppb
2019-12-04DBP 2005592604.20 ppb
2019-12-04DBP 2005592618.00 ppb
2019-12-04DBP 2005592623.50 ppb
2019-12-04DBP 2005592632.50 ppb
2019-12-05DBP 2005592646.30 ppb
2019-12-05DBP 2005592651.80 ppb
2019-12-06DBP 2005592669.30 ppb