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National Drinking Water Database


Di-n-butylphthalate in Delaware


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 Delaware

11 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
(Range)
1Dove Estates
Ridgely, DE
1111 of 11 ppb
(1 ppb)
2Upcountry Manufactured Home Community
Laurel, DE
651 of 10.6 ppb
(0.6 ppb)
3Point Farm
Dover, DE
2133 of 50.38 ppb
(0 to 1 ppb)
4Thomas Cove
Newark, DE
3,4001 of 60.14 ppb
(0 to 0.81 ppb)
5Bethany Beach Water Department
Bethany Beach, DE
12,1281 of 60.12 ppb
(0 to 0.7 ppb)
6Townsend Water Department
Townsend, DE
1,5002 of 190.06 ppb
(0 to 0.6 ppb)
7Church Creek
Newark, DE
2,7001 of 80.06 ppb
(0 to 0.5 ppb)
8Sea Winds
Dover, DE
1051 of 100.06 ppb
(0 to 0.6 ppb)
9Seaford Water Department
Seaford, DE
6,6991 of 40.04 ppb
(0 to 0.15 ppb)
10Rehoboth Bay Community
Rehoboth, DE
6251 of 100.02 ppb
(0 to 0.17 ppb)

Health Based Limits for Di-n-butylphthalate

StandardDescriptionLevel
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 Delaware

There are no violations reported for this contaminant in Delaware