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EWG's Tap Water Database — 2019 UPDATE

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Manganese

City of Rockport

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

Manganese is a naturally occurring element that is common in food and drinking water. Excessive manganese exposures may impair children's attention, memory and intellectual capacity. Click here to read more about manganese.

 

5

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2012N/A00N/A
20131.60 ppb111.60 ppb
2014ND10ND
2015ND10ND
201615.9 ppb1115.9 ppb
20171.40 ppb111.40 ppb

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 100 ppb

The EWG Health Guideline of 100 ppb for manganese was defined by the state of Minnesota as a health risk limit, the concentration of a contaminant that can be consumed with little or no risk to health. This health guideline protects against harm to the brain and nervous system.

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 manganese. Sample information shown below was taken by San Patricio Municipal Water District.

Date Lab ID Result
2013-06-13AC219821.60 ppb
2014-04-24AC51652ND
2015-02-25AC81826ND
2016-03-16AD2898215.9 ppb
2017-03-09AD742801.40 ppb