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EWG's Tap Water Database — 2021 UPDATE

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Manganese

City of Granbury

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.

MORE ABOUT THIS CONTAMINANT

 

111

Samples

0

Samples exceeding legal limit (MCL)

0

Samples exceeding
health guidelines

Testing results - average by year

 
YearAverage resultSamples takenDetectionsRange of results
2013N/A00N/A
20147.38 ppb331.80 ppb - 15.0 ppb
20151.12 ppb330.470 ppb - 1.80 ppb
20165.96 ppb770.920 ppb - 12.0 ppb
20174.03 ppb98ND - 7.80 ppb
20180.467 ppb31ND - 1.40 ppb
20191.00 ppb705ND - 26.5 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

Date Lab ID Result
2014-02-26Q14064480075.33 ppb
2014-07-09Q14268080151.80 ppb
2014-10-22Q145350300915.0 ppb
2015-06-18Q15229660180.470 ppb
2015-06-18Q15229660191.10 ppb
2015-06-18Q15229660201.80 ppb
2016-01-14Q16016710069.30 ppb
2016-01-14Q16016710073.50 ppb
2016-01-14Q16016710082.60 ppb
2016-01-14Q16016710092.40 ppb
2016-01-14Q160167101012.0 ppb
2016-01-14Q16016710110.920 ppb
2016-05-31Q162130800111.0 ppb
2017-07-06Q17275150137.70 ppb
2017-09-19Q1744801016ND
2017-09-19Q17448010014.30 ppb
2017-10-04Q17488390024.10 ppb
2017-10-04Q17488390266.00 ppb
2017-10-04Q17488390272.50 ppb
2017-10-04Q17488390282.10 ppb
2017-10-04Q17488390291.80 ppb
2017-10-04Q17488390307.80 ppb
2018-05-02Q1817630019ND
2018-05-02Q18176300031.40 ppb
2018-05-02Q1817630004ND
2019-03-18Q1911097021ND
2019-03-18Q1911097022ND
2019-03-18Q1911097023ND
2019-03-18Q19110970241.30 ppb
2019-03-18Q1911097025ND
2019-05-09Q1923093020ND
2019-06-19Q193818202219.2 ppb
2019-06-19Q1938182021ND
2019-06-19Q1938182020ND
2019-06-19Q1938182019ND
2019-06-19Q1938182018ND
2019-06-19Q1938182017ND
2019-06-19Q1938182016ND
2019-06-19Q1938182015ND
2019-06-19Q1938182014ND
2019-06-19Q1938182013ND
2019-06-19Q1938182012ND
2019-06-19Q1938182011ND
2019-06-19Q1938182010ND
2019-06-19Q1938182009ND
2019-06-19Q1938182008ND
2019-06-19Q1938182007ND
2019-06-19Q1938182006ND
2019-06-19Q1938182005ND
2019-06-19Q1938182004ND
2019-06-19Q1938182003ND
2019-06-19Q1938182002ND
2019-06-19Q1938182001ND
2019-09-04Q1962275018ND
2019-09-04Q1962275019ND
2019-09-04Q1962275016ND
2019-09-04Q1962275015ND
2019-09-04Q1962275014ND
2019-09-04Q1962275013ND
2019-09-04Q1962275012ND
2019-09-04Q1962275011ND
2019-09-04Q1962275010ND
2019-09-04Q1962275009ND
2019-09-04Q1962275008ND
2019-09-04Q1962275007ND
2019-09-04Q1962275006ND
2019-09-04Q1962275005ND
2019-09-04Q1962275004ND
2019-09-04Q1962275003ND
2019-09-04Q1962275002ND
2019-09-04Q1962275001ND
2019-09-04Q1962275020ND
2019-09-04Q1962275021ND
2019-09-04Q196227502212.4 ppb
2019-09-04Q1962275017ND
2019-12-17Q1980392015ND
2019-12-17Q1980392014ND
2019-12-17Q1980392013ND
2019-12-17Q198039201210.8 ppb
2019-12-17Q1980392011ND
2019-12-17Q1980392010ND
2019-12-17Q1980392009ND
2019-12-17Q1980392008ND
2019-12-17Q1980392007ND
2019-12-17Q1980392006ND
2019-12-17Q1980392005ND
2019-12-17Q1980392004ND
2019-12-17Q1980392003ND
2019-12-17Q1980392002ND
2019-12-17Q1980392001ND
2019-12-17Q1980392016ND
2019-12-17Q1980392017ND
2019-12-17Q1980392018ND
2019-12-17Q198039202026.5 ppb
2019-12-17Q1980392019ND
2020-01-2735526726001SEA1ND
2020-01-2735526726002SEA10.770 ppb
2020-01-2735526726003SEA11.20 ppb
2020-01-2735526726004SEA10.430 ppb
2020-01-2735526726005SEA11.40 ppb
2020-01-2735526726006SEA15.30 ppb
2020-01-2735526726007SEA19.40 ppb
2020-05-1835550919001SEA2ND
2020-07-1335563074001SEA3ND
2020-07-1335563074002SEA20.470 ppb
2020-07-1335563074003SEA20.810 ppb
2020-07-1335563074004SEA2ND
2020-07-1335563074005SEA21.10 ppb
2020-07-1335563074006SEA21.50 ppb
2020-07-1335563074007SEA28.20 ppb
2020-10-2635587608001SEA40.730 ppb