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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Harford County Department of Public Works

MTBE was used as gasoline oxygenation additive to boost the octane number. In 2005, MTBE was replaced by ethanol as a gasoline additive. MTBE causes cancers in rats.

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27

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
2014ND70ND
2015ND10ND
2016ND30ND
2017ND30ND
2018ND70ND
2019ND60ND

ppb = parts per billion

State and national drinking water standards and health guidelines

EWG Health Guideline 13 ppb

The EWG Health Guideline of 13 ppb for MTBE was defined 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 cancer.

ppb = parts per billion

All test results

Date Lab ID Result
2014-01-170120016_01_L4901ND
2014-04-140120016_02_L5015ND
2014-04-140120016_03_L5015ND
2014-04-290120016_01_L5028ND
2014-07-110120016_01_L5153ND
2014-10-310120016_01_20376ND
2014-12-110120016_01_20446ND
2015-02-130120016_01_20547ND
2016-04-04L6167674-1ND
2016-04-04L6167673-1ND
2016-04-15L6183269-7ND
2017-04-05L6756571-1ND
2017-04-05L6756568-1ND
2017-10-062267469001ND
2018-02-122295319001ND
2018-03-27E18003487001ND
2018-06-04E18004364001ND
2018-09-13E19000940001ND
2018-11-01E19001523001ND
2018-11-05E19001555004ND
2018-11-05E19001555001ND
2019-03-25E19003076004ND
2019-06-26E19004492002ND
2019-07-31E20000447009ND
2019-07-31E20000447007ND
2019-11-12E20001849004ND
2019-11-25E20001990001ND