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EWG's Tap Water Database — 2021 UPDATE

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MTBE

Metropolitan Utilities District

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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326

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
2014ND580ND
2015ND520ND
2016ND530ND
2017ND610ND
2018ND500ND
2019ND520ND

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
2014-01-08294497ND
2014-02-04283313ND
2014-02-04283315ND
2014-02-04283321ND
2014-02-04283310ND
2014-02-04283311ND
2014-02-04283312ND
2014-02-11287613ND
2014-02-11287615ND
2014-02-11287616ND
2014-02-11287617ND
2014-02-11287618ND
2014-02-11287619ND
2014-04-08293527ND
2014-05-05295288ND
2014-05-05295289ND
2014-05-05295290ND
2014-05-05295291ND
2014-05-05295280ND
2014-05-05295281ND
2014-05-05295282ND
2014-05-05295283ND
2014-05-05295284ND
2014-05-05295285ND
2014-05-05295286ND
2014-05-05295287ND
2014-05-12302599ND
2014-06-02294498ND
2014-07-08309807ND
2014-08-05311980ND
2014-08-05311981ND
2014-08-05311982ND
2014-08-05311983ND
2014-08-05311984ND
2014-08-05311985ND
2014-08-05311986ND
2014-08-05311987ND
2014-08-05311988ND
2014-08-05311989ND
2014-08-05311990ND
2014-08-05311991ND
2014-08-26311210ND
2014-08-26311212ND
2014-08-26311213ND
2014-08-26311214ND
2014-09-02324809ND
2014-11-03332925ND
2014-11-03332926ND
2014-11-03332927ND
2014-11-03332928ND
2014-11-03332929ND
2014-11-03332930ND
2014-11-03332931ND
2014-11-03332932ND
2014-11-03332933ND
2014-11-03332934ND
2014-11-03332935ND
2014-11-03332936ND
2015-02-02346549ND
2015-02-02346546ND
2015-02-02346547ND
2015-02-02346548ND
2015-02-02346550ND
2015-02-02346551ND
2015-02-02346552ND
2015-02-02346553ND
2015-02-02346554ND
2015-02-02346555ND
2015-02-02346556ND
2015-02-02346557ND
2015-04-07353665ND
2015-04-07353666ND
2015-04-07353667ND
2015-05-05361728ND
2015-05-05361729ND
2015-05-05361731ND
2015-05-05361732ND
2015-05-05361733ND
2015-05-05361736ND
2015-05-05361737ND
2015-05-05361738ND
2015-05-05361739ND
2015-05-05361730ND
2015-05-05361734ND
2015-05-05361735ND
2015-07-07371752ND
2015-08-03374538ND
2015-08-03374539ND
2015-08-03374540ND
2015-08-03374541ND
2015-08-03374542ND
2015-08-03374543ND
2015-08-03374546ND
2015-08-03374547ND
2015-08-03374548ND
2015-08-03374549ND
2015-08-03374544ND
2015-08-03374545ND
2015-11-04393715ND
2015-11-04393716ND
2015-11-04393717ND
2015-11-04393718ND
2015-11-04393707ND
2015-11-04393708ND
2015-11-04393709ND
2015-11-04393710ND
2015-11-04393711ND
2015-11-04393712ND
2015-11-04393713ND
2015-11-04393714ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-02-01ND
2016-04-04ND
2016-04-18ND
2016-04-18ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-05-02ND
2016-07-25ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-08-02ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2016-11-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-02-07ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-11ND
2017-04-17ND
2017-04-17ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-02ND
2017-05-15ND
2017-05-15ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-06-05ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-08-07ND
2017-09-19ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2017-11-07ND
2018-02-06534089ND
2018-02-06534090ND
2018-02-06534091ND
2018-02-06534092ND
2018-02-06534093ND
2018-02-06534094ND
2018-02-06534095ND
2018-02-06534096ND
2018-02-06534097ND
2018-02-06534098ND
2018-02-06534099ND
2018-02-06534100ND
2018-05-07549814ND
2018-05-07549815ND
2018-05-07549816ND
2018-05-07549817ND
2018-05-07549818ND
2018-05-07549819ND
2018-05-07549820ND
2018-05-07549821ND
2018-05-07549822ND
2018-05-07549823ND
2018-05-07549824ND
2018-05-07549825ND
2018-05-14542539ND
2018-05-14542540ND
2018-08-08567019ND
2018-08-08567020ND
2018-08-08567021ND
2018-08-08567022ND
2018-08-08567023ND
2018-08-08567024ND
2018-08-08567025ND
2018-08-08567026ND
2018-08-08567027ND
2018-08-08567028ND
2018-08-08567029ND
2018-08-08567030ND
2018-11-06583374ND
2018-11-06583375ND
2018-11-06583376ND
2018-11-06583377ND
2018-11-06583378ND
2018-11-06583379ND
2018-11-06583380ND
2018-11-06583381ND
2018-11-06583382ND
2018-11-06583383ND
2018-11-06583384ND
2018-11-06583385ND
2019-02-05595236ND
2019-02-05595237ND
2019-02-05595238ND
2019-02-05595239ND
2019-02-05595240ND
2019-02-05595241ND
2019-02-05595242ND
2019-02-05595243ND
2019-02-05595244ND
2019-02-05595245ND
2019-02-05595246ND
2019-02-05595247ND
2019-04-02604245ND
2019-04-02604246ND
2019-04-22604810ND
2019-05-07600564ND
2019-05-07600565ND
2019-05-07600566ND
2019-05-07600567ND
2019-05-07600568ND
2019-05-07600569ND
2019-05-07600570ND
2019-05-07600571ND
2019-05-07600572ND
2019-05-07600573ND
2019-05-07600574ND
2019-05-07600575ND
2019-06-10604811ND
2019-08-06622448ND
2019-08-06622449ND
2019-08-06622450ND
2019-08-06622451ND
2019-08-06622452ND
2019-08-06622453ND
2019-08-06622454ND
2019-08-06622455ND
2019-08-06622456ND
2019-08-06622457ND
2019-08-06622458ND
2019-08-06622459ND
2019-11-05644378ND
2019-11-05644379ND
2019-11-05644380ND
2019-11-05644381ND
2019-11-05644382ND
2019-11-05644383ND
2019-11-05644384ND
2019-11-05644385ND
2019-11-05644386ND
2019-11-05644387ND
2019-11-05644388ND
2019-11-05644389ND