MTBE
CTWC - Shoreline Region-Guilford System
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.
Testing results - average by year
Year | Average result | Samples taken | Detections | Range of results |
---|---|---|---|---|
2014 | ND | 13 | 0 | ND |
2015 | ND | 12 | 0 | ND |
2016 | ND | 11 | 0 | ND |
2017 | ND | 10 | 0 | ND |
2018 | ND | 11 | 0 | ND |
2019 | ND | 10 | 0 | ND |
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 |
---|---|---|
2014-01-29 | 140130CWCBVOC1 | ND |
2014-02-24 | 2223VOC1 | ND |
2014-03-05 | 2672VOC1 | ND |
2014-04-21 | 5353VOC1 | ND |
2014-04-21 | 5354VOC1 | ND |
2014-06-12 | 8366VOC1 | ND |
2014-06-12 | 8367VOC1 | ND |
2014-06-12 | 8370VOC1 | ND |
2014-08-13 | 140915-0128VOC1 | ND |
2014-08-13 | 140915-0129VOC1 | ND |
2014-08-13 | BG93593VOC1 | ND |
2014-08-13 | BG93595VOC1 | ND |
2014-11-03 | BH35439VOC1 | ND |
2015-01-21 | BH65787VOC1 | ND |
2015-02-12 | BH73177VOC1 | ND |
2015-03-09 | BH80664VOC1 | ND |
2015-06-02 | BJ24602VOC1 | ND |
2015-06-02 | BJ24617VOC1 | ND |
2015-06-02 | BJ24619VOC1 | ND |
2015-06-02 | BJ24597VOC1 | ND |
2015-06-03 | BJ25404VOC1 | ND |
2015-07-27 | BJ63977VOC1 | ND |
2015-07-27 | BJ63961VOC1 | ND |
2015-10-19 | BK10284VOC1 | ND |
2015-11-03 | BK17717VOC1 | ND |
2016-01-11 | BK50864VOC1 | ND |
2016-01-19 | BK54776VOC1 | ND |
2016-01-19 | BK54777VOC1 | ND |
2016-02-11 | BK64351VOC1 | ND |
2016-03-14 | BK78125VOC1 | ND |
2016-04-11 | BN11374VOC1 | ND |
2016-04-11 | BN11376VOC1 | ND |
2016-06-01 | BN44876VOC1 | ND |
2016-06-01 | BN44892VOC1 | ND |
2016-07-12 | BN71476VOC1 | ND |
2016-07-13 | BN72282VOC1 | ND |
2017-01-17 | BX30298VOC1 | ND |
2017-01-17 | BX30299VOC1 | ND |
2017-01-18 | BX31348VOC1 | ND |
2017-01-30 | BX40966VOC1 | ND |
2017-03-08 | BX82062VOC1 | ND |
2017-06-29 | BY50637VOC1 | ND |
2017-09-25 | BZ09163VOC1 | ND |
2017-10-24 | BZ27135VOC1 | ND |
2017-10-25 | BZ27134VOC1 | ND |
2017-11-09 | BZ38785VOC1 | ND |
2018-01-16 | BZ73485VOC1 | ND |
2018-03-30 | CA11464VOC1 | ND |
2018-04-11 | CA18261VOC1 | ND |
2018-07-09 | CA85598VOC1 | ND |
2018-07-17 | CA91979 | ND |
2018-09-13 | VOC1 200505275 | ND |
2018-09-13 | VOC1 200505276 | ND |
2018-09-13 | VOC1 200505266 | ND |
2018-09-19 | VOC1 200506116 | ND |
2018-09-20 | VOC1 200506324 | ND |
2018-10-25 | VOC1 200510568 | ND |
2019-01-30 | VOC1 200520057 | ND |
2019-06-24 | VOC1 200538005 | ND |
2019-07-08 | VOC1 200541172 | ND |
2019-07-08 | VOC1 200539194 | ND |
2019-07-16 | VOC1 200541091 | ND |
2019-07-16 | VOC1 200540648 | ND |
2019-07-16 | VOC1 200540644 | ND |
2019-09-17 | VOC1 200549238 | ND |
2019-09-18 | VOC1 200549465 | ND |
2019-12-10 | VOC1 200559663 | ND |