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National Drinking Water Database

Di-n-butylphthalate in California

Di-n-butylphthalate is an industrial solvent or additive used in many consumer products such as nail polish, cosmetics, some printing inks, pharmaceutical coatings, cleaning products and insecticides. [read more]

The Most Polluted Communities in California

5 water utilities reported detecting Di-n-butylphthalate in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Di-n-butylphthalate level

RankSystem Population Served Positive test results of total reported tests Average Level
1Golden Hills Csd
Tehachapi, CA
7,4342 of 52.11 ppb
(0 to 8.1 ppb)
2Athal Mutual Water System
Bakersfield, CA
851 of 21.05 ppb
(0 to 2.1 ppb)
3City of Delano
Delano, CA
49,3591 of 30.68 ppb
(0 to 2.03 ppb)
4China Lake Naval Air Weapons Station
China Lake, CA
9,5001 of 30.55 ppb
(0 to 1.65 ppb)
5Glendale-City, Water Dept.
Glendale, CA
200,0007 of 41< 0.01 ppb
(0 to 0.12 ppb)

Health Based Limits for Di-n-butylphthalate

Health-Based Screening LevelA benchmark concentration of contaminants in water that may be of potential concern for human health, if exceeded. For noncarcinogens, the HBSL represents the contaminant concentration in drinking water that is not expected to cause any adverse effects over a lifetime of exposure. For carcinogens, the HBSL range represents the contaminant concentration in drinking water that corresponds to an excess estimated lifetime cancer risk of 1 chance in 1 million to 1 chance in 10 thousand. Source: U.S. Geological Survey.700 ppb
EPA Human Health Water Quality CriteriaWater quality criteria set by the US EPA provide guidance for states and tribes authorized to establish water quality standards under the Clean Water Act (CWA) to protect human health. These are non-enforceable standards based upon exposure by both drinking water and the contribution of water contamination to other consumed foods. Source: U.S. Environmental Protection Agency.2000 ppb
Drinking Water Equivalent LevelA lifetime exposure concentration protective of adverse, noncarcinogenic health effects, that assumes all of the exposure to a contaminant is from drinking water. Source: U.S. Environmental Protection Agency.4000 ppb

Violation Summary for Di-n-butylphthalate in California

There are no violations reported for this contaminant in California