MTBE
Garfield Water Department
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.
83
Samples
0
Samples exceeding legal limit (MCL)
0
Samples exceeding
health guidelines
Testing results - average by year
| Year | Average result | Samples taken | Detections | Range of results |
|---|---|---|---|---|
| 2013 | N/A | 0 | 0 | N/A |
| 2014 | 0.779 ppb | 16 | 14 | ND - 1.28 ppb |
| 2015 | 0.439 ppb | 15 | 9 | ND - 0.880 ppb |
| 2016 | 0.121 ppb | 18 | 4 | ND - 0.600 ppb |
| 2017 | 0.132 ppb | 9 | 2 | ND - 0.650 ppb |
| 2018 | 0.105 ppb | 13 | 2 | ND - 0.710 ppb |
| 2019 | 0.0917 ppb | 12 | 2 | ND - 0.560 ppb |
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 |
|---|---|---|
| 2014-01-21 | AB46229HZ | 1.01 ppb |
| 2014-01-21 | AB46230HZ | ND |
| 2014-02-20 | AB47523HZ | 0.830 ppb |
| 2014-03-19 | AB48621HZ | 1.28 ppb |
| 2014-04-15 | AB49727HZ | 1.10 ppb |
| 2014-04-15 | AB49728HZ | 0.700 ppb |
| 2014-05-13 | AB50732HZ | 1.06 ppb |
| 2014-06-10 | AB51911HZ | 0.900 ppb |
| 2014-07-15 | AB53423HZ | 1.02 ppb |
| 2014-07-15 | AB53424HZ | 0.750 ppb |
| 2014-08-19 | L5210780-2 | ND |
| 2014-09-15 | L5250967-1 | 0.830 ppb |
| 2014-10-21 | AB57426HZ | 0.910 ppb |
| 2014-10-21 | AB57427HZ | 0.520 ppb |
| 2014-11-12 | AB58282HZ | 0.770 ppb |
| 2014-12-09 | AB59404HZ | 0.790 ppb |
| 2015-01-21 | AB60972HZ | 0.570 ppb |
| 2015-01-21 | AB60971HZ | 0.880 ppb |
| 2015-02-24 | AB62244HZ | 0.760 ppb |
| 2015-03-17 | AB63206HZ | 0.860 ppb |
| 2015-04-21 | AB64574HZ | 0.570 ppb |
| 2015-04-21 | AB64573HZ | 0.790 ppb |
| 2015-06-09 | AB66698HZ | ND |
| 2015-06-23 | AB67401HZ | ND |
| 2015-08-06 | AB69499HZ | ND |
| 2015-08-06 | AB69500HZ | 0.780 ppb |
| 2015-08-06 | AB69498HZ | 0.800 ppb |
| 2015-09-22 | AB71495HZ | ND |
| 2015-10-20 | AB72632HZ | 0.580 ppb |
| 2015-10-20 | AB72633HZ | ND |
| 2015-10-20 | AB72634HZ | ND |
| 2016-01-12 | AB75855HZ | 0.580 ppb |
| 2016-01-12 | AB75856HZ | ND |
| 2016-01-12 | AB75854HZ | ND |
| 2016-01-26 | AB76459HZ | ND |
| 2016-02-16 | AB77202HZ | ND |
| 2016-04-12 | AB79639HZ | ND |
| 2016-04-12 | AB79640HZ | ND |
| 2016-04-12 | AB79638HZ | ND |
| 2016-07-12 | AB83719HZ | 0.500 ppb |
| 2016-07-12 | AB83718HZ | ND |
| 2016-07-12 | AB83720HZ | 0.500 ppb |
| 2016-08-18 | AB85462HZ | ND |
| 2016-09-13 | AB86447HZ | ND |
| 2016-10-11 | AB87765HZ | 0.600 ppb |
| 2016-10-11 | AB87764HZ | ND |
| 2016-10-11 | AB87763HZ | ND |
| 2016-11-22 | AB89699HZ | ND |
| 2016-12-13 | AB90445HZ | ND |
| 2017-01-10 | AB91459HZ | ND |
| 2017-01-10 | AB91460HZ | ND |
| 2017-04-11 | AB95109HZ | ND |
| 2017-04-11 | AB95110HZ | ND |
| 2017-07-11 | AB98675HZ | ND |
| 2017-07-11 | AB98674HZ | 0.540 ppb |
| 2017-10-10 | AC02410HZ | 0.650 ppb |
| 2017-10-10 | AC02407HZ | ND |
| 2017-12-12 | AC04918HZ | ND |
| 2018-01-09 | AC05949HZ | ND |
| 2018-01-09 | AC05950HZ | ND |
| 2018-04-10 | JC64163-2 | 0.710 ppb |
| 2018-04-10 | JC64163-1 | ND |
| 2018-05-09 | AC10706HZ | ND |
| 2018-07-17 | AC13548HZ | ND |
| 2018-07-17 | AC13545HZ | ND |
| 2018-08-03 | AC14315HZ | ND |
| 2018-09-18 | AC16305HZ | ND |
| 2018-10-04 | AC17147HZ | 0.660 ppb |
| 2018-10-04 | AC17143HZ | ND |
| 2018-11-09 | AC18616HZ | ND |
| 2018-12-11 | AC19842HZ | ND |
| 2019-01-08 | AC20865HZ | ND |
| 2019-01-08 | AC20869HZ | 0.560 ppb |
| 2019-02-11 | AC22466HZ | ND |
| 2019-04-02 | AC24607HZ | ND |
| 2019-04-02 | AC24608HZ | ND |
| 2019-04-02 | AC24609HZ | 0.540 ppb |
| 2019-07-12 | AC29239HZ | ND |
| 2019-07-12 | AC29243HZ | ND |
| 2019-07-12 | AC29242HZ | ND |
| 2019-10-02 | AC33249HZ | ND |
| 2019-10-02 | AC33253HZ | ND |
| 2019-10-02 | AC33251HZ | ND |