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EWG's Tap Water Database — 2021 UPDATE

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Manganese

City of Houston

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

 

229

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
201411.7 ppb18181.000 ppb - 47.1 ppb
201516.0 ppb1716ND - 57.5 ppb
20167.57 ppb2919ND - 42.6 ppb
20178.57 ppb2720ND - 46.8 ppb
20188.64 ppb1714ND - 51.5 ppb
20197.14 ppb121103ND - 54.6 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
2014-02-03AC410095.20 ppb
2014-03-14AC470935.10 ppb
2014-03-14AC4709447.1 ppb
2014-03-14AC4709519.1 ppb
2014-04-16AC5078011.7 ppb
2014-04-16AC5078110.5 ppb
2014-04-17AC5102110.3 ppb
2014-06-03AC557684.90 ppb
2014-06-03AC557699.10 ppb
2014-07-15AC5967512.9 ppb
2014-07-15AC596747.10 ppb
2014-07-16AC598109.40 ppb
2014-08-14AC6364413.6 ppb
2014-10-08AC691511.000 ppb
2014-10-09AC693435.10 ppb
2014-10-09AC693429.70 ppb
2014-12-18AC7542121.1 ppb
2014-12-18AC754247.60 ppb
2015-03-04AC8282857.5 ppb
2015-03-05AC8283714.0 ppb
2015-06-04AC94569ND
2015-06-04AC945687.90 ppb
2015-06-04AC9456746.0 ppb
2015-06-04AC9456615.4 ppb
2015-06-04AC9456514.5 ppb
2015-07-21AD003175.00 ppb
2015-07-21AD0031529.4 ppb
2015-07-21AD0031610.1 ppb
2015-07-21AD0032214.5 ppb
2015-07-21AD0032010.6 ppb
2015-09-17AD074994.50 ppb
2015-10-22AD1144211.2 ppb
2015-10-22AD1144514.4 ppb
2015-10-22AD114448.70 ppb
2015-11-12AD133007.60 ppb
2016-02-18AD241981.50 ppb
2016-02-18AD24206ND
2016-02-18AD24189ND
2016-02-18AD24207ND
2016-02-18AD241977.60 ppb
2016-02-18AD2420511.8 ppb
2016-03-03AD268255.70 ppb
2016-03-16AD2898311.7 ppb
2016-03-16AD2897938.0 ppb
2016-03-17AD292968.50 ppb
2016-03-17AD292957.40 ppb
2016-03-23AD30057ND
2016-03-23AD3005912.3 ppb
2016-03-23AD30063ND
2016-03-23AD300584.80 ppb
2016-06-08AD39687ND
2016-06-08AD39686ND
2016-06-16AD40881ND
2016-06-16AD4087612.1 ppb
2016-09-20AD502735.60 ppb
2016-09-20AD502744.30 ppb
2016-09-21AD5063112.9 ppb
2016-10-06AD526209.60 ppb
2016-10-06AD52621ND
2016-10-06AD526243.50 ppb
2016-11-18AD5872516.1 ppb
2016-11-21AD587293.50 ppb
2016-11-21AD58730ND
2016-11-21AD5872842.6 ppb
2017-01-26AD67045ND
2017-01-26AD67054ND
2017-02-28AD723833.80 ppb
2017-02-28AD7238146.8 ppb
2017-03-01AD727083.60 ppb
2017-03-01AD727074.50 ppb
2017-03-02AD730253.80 ppb
2017-03-02AD730182.70 ppb
2017-03-28AD770826.60 ppb
2017-03-28AD77083ND
2017-03-28AD77081ND
2017-03-28AD77080ND
2017-03-29AD7738913.0 ppb
2017-03-29AD7738514.1 ppb
2017-04-26AD8110625.4 ppb
2017-04-27AD81406ND
2017-04-27AD8140711.6 ppb
2017-07-06AD8841828.2 ppb
2017-07-06AD88419ND
2017-07-06AD8842010.2 ppb
2017-07-25AD9048513.7 ppb
2017-09-11AD953981.10 ppb
2017-09-11AD9539411.9 ppb
2017-09-26AD979543.40 ppb
2017-09-26AD979598.50 ppb
2017-09-26AD979557.80 ppb
2017-11-07AE0378410.6 ppb
2018-01-18AE091885.80 ppb
2018-01-18AE0919010.2 ppb
2018-01-18AE0918951.5 ppb
2018-01-23AE09790ND
2018-01-23AE0978911.6 ppb
2018-01-23AE097889.30 ppb
2018-01-31AE11454ND
2018-04-26AE240666.30 ppb
2018-04-26AE2406711.6 ppb
2018-04-26AE240658.30 ppb
2018-05-22AE271746.80 ppb
2018-07-19AE338881.40 ppb
2018-08-03AE357618.30 ppb
2018-08-15AE371114.10 ppb
2018-08-15AE371102.80 ppb
2018-08-15AE37108ND
2018-09-26AE416848.90 ppb
2019-01-15AE500415.40 ppb
2019-01-15AE5004054.6 ppb
2019-01-16AE500374.90 ppb
2019-01-1719011610.085.20 ppb
2019-01-1719011610.025.60 ppb
2019-03-06AE573275.00 ppb
2019-03-06AE573249.60 ppb
2019-03-06AE5732212.9 ppb
2019-03-06AE5732340.5 ppb
2019-03-06AE573261.10 ppb
2019-03-06AE573253.00 ppb
2019-04-0819041009.052.62 ppb
2019-04-0819041009.074.35 ppb
2019-04-0819041009.101.42 ppb
2019-04-0819041009.198.67 ppb
2019-04-0819041009.339.13 ppb
2019-04-0819041009.302.97 ppb
2019-04-0819041009.264.86 ppb
2019-04-0819041009.0911.8 ppb
2019-04-0819041009.062.39 ppb
2019-04-0819041009.4223.4 ppb
2019-04-0819041009.4116.6 ppb
2019-04-0819041009.401.52 ppb
2019-04-0819041009.430.455 ppb
2019-04-0819041009.327.87 ppb
2019-04-0919041009.1112.6 ppb
2019-04-0919041009.23ND
2019-04-0919041009.2110.3 ppb
2019-04-0919041009.209.24 ppb
2019-04-0919041009.318.53 ppb
2019-04-0919041009.287.88 ppb
2019-04-0919041009.2517.6 ppb
2019-04-0919041009.2416.5 ppb
2019-04-0919041009.180.649 ppb
2019-04-0919041009.170.613 ppb
2019-04-0919041009.168.50 ppb
2019-04-0919041009.150.505 ppb
2019-04-0919041009.140.685 ppb
2019-04-0919041009.130.443 ppb
2019-04-0919041009.083.14 ppb
2019-04-0919041009.353.26 ppb
2019-04-0919041009.3614.6 ppb
2019-04-0919041009.39ND
2019-04-0919041009.385.50 ppb
2019-04-0919041009.37ND
2019-04-0919041009.448.95 ppb
2019-04-0919041009.4517.7 ppb
2019-04-0919041009.468.99 ppb
2019-04-0919041009.47ND
2019-04-10AE6196612.9 ppb
2019-04-10AE6196722.3 ppb
2019-04-11AE6196911.0 ppb
2019-04-11AE619681.50 ppb
2019-07-1719071712.011.93 ppb
2019-07-1719071712.032.76 ppb
2019-07-1719071712.051.17 ppb
2019-07-1719071712.067.21 ppb
2019-07-1719071712.093.17 ppb
2019-07-1719071712.082.40 ppb
2019-07-1719071712.074.47 ppb
2019-07-1719071712.041.58 ppb
2019-07-1719071712.02ND
2019-07-1719071712.104.01 ppb
2019-07-25AE758812.40 ppb
2019-07-25AE758782.70 ppb
2019-09-23AE84176ND
2019-09-23AE841771.50 ppb
2019-10-0219100208.0548.7 ppb
2019-10-0219100208.077.06 ppb
2019-10-0219100208.1111.6 ppb
2019-10-0219100208.1011.4 ppb
2019-10-0219100208.2316.0 ppb
2019-10-0219100208.2111.1 ppb
2019-10-0219100208.204.21 ppb
2019-10-0219100208.196.70 ppb
2019-10-0219100208.3312.4 ppb
2019-10-0219100208.313.96 ppb
2019-10-0219100208.306.24 ppb
2019-10-0219100208.289.88 ppb
2019-10-0219100208.264.14 ppb
2019-10-0219100208.2513.6 ppb
2019-10-0219100208.2420.8 ppb
2019-10-0219100208.18ND
2019-10-0219100208.17ND
2019-10-0219100208.1614.1 ppb
2019-10-0219100208.146.08 ppb
2019-10-0219100208.136.90 ppb
2019-10-0219100208.121.84 ppb
2019-10-0219100208.084.89 ppb
2019-10-0219100208.0912.8 ppb
2019-10-0319100208.296.94 ppb
2019-10-1619100208.273.82 ppb
2019-10-1619100208.155.61 ppb
2019-10-1619100208.06ND
2019-10-1619100208.357.63 ppb
2019-10-1619100208.365.40 ppb
2019-10-1619100208.4116.0 ppb
2019-10-1619100208.401.51 ppb
2019-10-1619100208.39ND
2019-10-1619100208.384.19 ppb
2019-10-1619100208.37ND
2019-10-1619100208.43ND
2019-10-1619100208.327.06 ppb
2019-10-1619100208.447.05 ppb
2019-10-1619100208.459.12 ppb
2019-10-1619100208.468.70 ppb
2019-10-1619100208.47ND
2019-10-1719100208.4213.6 ppb
2019-11-18AE89449ND
2019-11-18AE8945013.2 ppb
2019-11-22AE903363.20 ppb
2019-11-22AE90338ND
2019-11-22AE903373.40 ppb
2019-11-22AE90333ND
2019-11-22AE90334ND
2019-12-02AE907962.60 ppb
2019-12-02AE90794ND
2019-12-02AE907932.20 ppb
2019-12-02AE9079111.9 ppb
2019-12-02AE907956.80 ppb
2019-12-02AE907924.20 ppb