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EWG's Tap Water Database — 2021 UPDATE

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Monochloroacetic acid

City of Rio Grande City

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
2017ND160ND
20180.344 ppb161ND - 5.50 ppb
20191.14 ppb162ND - 9.70 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
2014-02-26AC44729ND
2014-02-26AC44723ND
2014-02-26AC44722ND
2014-02-26AC44701ND
2014-06-10AC56433ND
2014-06-10AC56434ND
2014-06-10AC56452ND
2014-06-10AC56435ND
2014-09-23AC67855ND
2014-09-23AC67832ND
2014-09-23AC67846ND
2014-09-23AC67833ND
2014-12-02AC73312ND
2014-12-02AC73330ND
2014-12-02AC73311ND
2014-12-02AC73310ND
2015-03-10AC83481ND
2015-03-10AC83480ND
2015-03-10AC83466ND
2015-03-10AC83447ND
2015-06-11AC95758ND
2015-06-11AC95755ND
2015-06-11AC95767ND
2015-06-11AC95770ND
2015-09-22AD07986ND
2015-09-22AD07968ND
2015-09-22AD07984ND
2015-09-22AD07989ND
2015-11-03AD12354ND
2015-11-03AD12358ND
2015-11-03AD12351ND
2015-11-03AD12359ND
2016-02-22AD24703ND
2016-02-22AD24746ND
2016-02-22AD24704ND
2016-02-22AD24741ND
2016-05-10AD36377ND
2016-05-10AD36354ND
2016-05-10AD36352ND
2016-05-10AD36373ND
2016-09-16AD50075ND
2016-09-16AD50063ND
2016-09-16AD50086ND
2016-09-16AD50087ND
2016-10-25AD54557ND
2016-10-25AD54546ND
2016-10-25AD54548ND
2016-10-25AD54550ND
2017-03-07AD74330ND
2017-03-07AD74331ND
2017-03-07AD74329ND
2017-03-07AD74332ND
2017-04-26AD81441ND
2017-04-26AD81442ND
2017-04-26AD81447ND
2017-04-26AD81446ND
2017-08-01AD91549ND
2017-08-01AD91547ND
2017-08-01AD91545ND
2017-08-01AD91552ND
2017-11-09AE04305ND
2017-11-09AE04314ND
2017-11-09AE04316ND
2017-11-09AE04306ND
2018-03-09AE17818ND
2018-03-09AE17821ND
2018-03-09AE17815ND
2018-03-09AE17816ND
2018-05-15AE26341ND
2018-05-15AE26357ND
2018-05-15AE26356ND
2018-05-15AE263545.50 ppb
2018-08-31AE39127ND
2018-08-31AE39124ND
2018-08-31AE39126ND
2018-08-31AE39125ND
2018-12-04AE47754ND
2018-12-04AE47757ND
2018-12-04AE47752ND
2018-12-04AE47755ND
2019-02-06AE53425ND
2019-02-06AE53424ND
2019-02-06AE53429ND
2019-02-06AE53441ND
2019-06-14AE70821ND
2019-06-14AE708129.70 ppb
2019-06-14AE708138.50 ppb
2019-06-14AE70823ND
2019-09-13AE83576ND
2019-09-13AE83529ND
2019-09-13AE83527ND
2019-09-13AE83533ND
2019-12-06AE91869ND
2019-12-06AE91866ND
2019-12-06AE91860ND
2019-12-06AE91862ND