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EWG's Tap Water Database — 2019 UPDATE

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Trichloroacetic acid

City of Rockport

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

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.

 

6

Samples

0

Samples exceeding legal limit (MCL)

5

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
20120.762 ppb136ND - 2.00 ppb
2013ND160ND
20140.925 ppb1610ND - 2.00 ppb
20150.919 ppb169ND - 2.10 ppb
20160.781 ppb169ND - 1.70 ppb
20171.38 ppb1613ND - 2.30 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

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

Date Lab ID Result
2012-07-1812076740041.80 ppb
2013-06-13AC22078ND
2014-06-16AC568791.50 ppb
2015-09-10AD065392.10 ppb
2016-06-01AD389631.20 ppb
2017-05-24AD854671.10 ppb