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EWG's Tap Water Database — 2019 UPDATE

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Monochloroacetic acid

City of Rockport

NOTE: City of Rockport purchases water from San Patricio Municipal Water District which is required to test for monochloroacetic acid. Sample information shown below was taken by San Patricio Municipal Water District.

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20121.28 ppb135ND - 4.00 ppb
2013ND160ND
2014ND160ND
20150.663 ppb162ND - 5.40 ppb
20160.244 ppb161ND - 3.90 ppb
2017ND160ND

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

NOTE: City of Rockport purchases water from San Patricio Municipal Water District which is required to test for monochloroacetic acid. Sample information shown below was taken by San Patricio Municipal Water District.

Date Lab ID Result
2012-07-181207674004ND
2013-06-13AC22078ND
2014-06-16AC56879ND
2015-09-10AD06539ND
2016-06-01AD38963ND
2017-05-24AD854672.20 ppb