National Drinking Water Database
Methyl isobutyl ketone in California
Methyl isobutyl ketone (4-Methyl-2-pentanone) is an industrial chemical used in the production of paints, pesticides, textiles, inks and rubber.
The Most Polluted Communities in California
2 water utilities reported detecting Methyl isobutyl ketone in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average Methyl isobutyl ketone level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | City of Galt Galt, CA | 22,982 | 1 of 1 | 0.73 ppb (0.73 ppb) |
| 2 | Yucaipa Valley WD Id-A&2 Yucaipa, CA | 34,000 | 1 of 48 | 0.32 ppb (0 to 15.5 ppb) |
Health Based Limits for Methyl isobutyl ketone
There are no health based standards that EWG is using for this chemical
Violation Summary for Methyl isobutyl ketone in California
There are no violations reported for this contaminant in California