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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

Aqua Water Supply Corporation

Monochloroacetic 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

 

96

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2014ND160ND
2015ND160ND
2016ND160ND
20170.125 ppb161ND - 2.00 ppb
2018ND160ND
20190.169 ppb161ND - 2.70 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 53 ppb

The EWG Health Guideline of 53 ppb for monochloroacetic 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.. This health guideline protects against system toxicity.

ppb = parts per billion

All test results

Date Lab ID Result
2014-03-10AC46216ND
2014-03-10AC46214ND
2014-03-10AC46215ND
2014-03-10AC46218ND
2014-04-14AC50394ND
2014-04-14AC50356ND
2014-04-14AC50395ND
2014-04-14AC50349ND
2014-08-13AC63573ND
2014-08-13AC63561ND
2014-08-13AC63564ND
2014-08-13AC63562ND
2014-10-22AC70313ND
2014-10-22AC70312ND
2014-10-22AC70309ND
2014-10-22AC70308ND
2015-02-09AC79686ND
2015-02-09AC79687ND
2015-02-09AC79685ND
2015-02-09AC79684ND
2015-04-13AC87957ND
2015-04-13AC87959ND
2015-04-13AC87956ND
2015-04-14AC88099ND
2015-07-10AC99028ND
2015-07-10AC99031ND
2015-07-10AC99029ND
2015-07-10AC99030ND
2015-10-15AD10806ND
2015-10-15AD10805ND
2015-10-15AD10803ND
2015-10-15AD10804ND
2016-01-26AD20065ND
2016-01-26AD20049ND
2016-01-26AD20053ND
2016-01-26AD20059ND
2016-04-19AD33442ND
2016-04-19AD33443ND
2016-04-19AD33444ND
2016-04-19AD33445ND
2016-07-26AD45641ND
2016-07-26AD45656ND
2016-07-26AD45657ND
2016-07-26AD45644ND
2016-10-18AD53546ND
2016-10-18AD53553ND
2016-10-18AD53547ND
2016-10-18AD53544ND
2017-01-11AD64282ND
2017-01-11AD64283ND
2017-01-12AD64706ND
2017-01-12AD64705ND
2017-04-05AD78523ND
2017-04-05AD78521ND
2017-04-05AD78526ND
2017-04-05AD78528ND
2017-09-18AD96505ND
2017-09-18AD96509ND
2017-09-18AD96504ND
2017-09-18AD96508ND
2017-10-25AE02078ND
2017-10-25AE02091ND
2017-10-25AE02076ND
2017-10-25AE020772.00 ppb
2018-01-25AE10523ND
2018-01-25AE10478ND
2018-01-25AE10492ND
2018-01-25AE10504ND
2018-04-09AE21622ND
2018-04-09AE21626ND
2018-04-09AE21627ND
2018-04-09AE21632ND
2018-08-24AE38412ND
2018-08-24AE38411ND
2018-08-24AE38407ND
2018-08-24AE38413ND
2018-10-16AE43591ND
2018-10-16AE43590ND
2018-10-16AE43589ND
2018-10-16AE43588ND
2019-03-15AE58531ND
2019-03-15AE58529ND
2019-03-15AE58528ND
2019-03-15AE58530ND
2019-05-15AE66471ND
2019-05-15AE66470ND
2019-05-15AE66484ND
2019-05-15AE66468ND
2019-08-16AE79108ND
2019-08-16AE79107ND
2019-08-16AE79105ND
2019-08-16AE79104ND
2019-11-15AE893412.70 ppb
2019-11-15AE89339ND
2019-11-15AE89340ND
2019-11-15AE89338ND