MTBE
Kalona 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.
17
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 |
|---|---|---|---|---|
| 2018 | 1.25 ppb | 2 | 2 | 1.20 ppb - 1.30 ppb |
| 2019 | 1.37 ppb | 3 | 3 | 1.000 ppb - 1.60 ppb |
| 2020 | 1.45 ppb | 4 | 4 | 0.600 ppb - 1.80 ppb |
| 2021 | 1.68 ppb | 4 | 4 | 1.40 ppb - 2.20 ppb |
| 2022 | 1.40 ppb | 3 | 3 | 1.40 ppb |
| 2023 | 1.90 ppb | 1 | 1 | 1.90 ppb |
ppb = parts per billion
State, National, and Health Guidelines for Drinking Water
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 |
|---|---|---|
| 2018-08-15 | OE699329 | 1.30 ppb |
| 2018-08-15 | OE699328 | 1.20 ppb |
| 2019-01-25 | OE764324 | 1.000 ppb |
| 2019-08-12 | OE848725 | 1.50 ppb |
| 2019-08-12 | OE848726 | 1.60 ppb |
| 2020-01-27 | OE921012 | 0.600 ppb |
| 2020-08-06 | OE1162207 | 1.80 ppb |
| 2020-08-06 | OE1162208 | 1.70 ppb |
| 2020-10-22 | OE1358388 | 1.70 ppb |
| 2021-01-14 | OE1546019 | 2.20 ppb |
| 2021-08-10 | OE1790125 | 1.40 ppb |
| 2021-08-10 | OE1790126 | 1.40 ppb |
| 2021-10-05 | OE1876395 | 1.70 ppb |
| 2022-08-15 | OE2154698 | 1.40 ppb |
| 2022-08-15 | OE2154699 | 1.40 ppb |
| 2022-10-20 | OE2193345 | 1.40 ppb |
| 2023-10-12 | OE2349924 | 1.90 ppb |