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National Drinking Water Database


Naphthalene in Delaware


Naphthalene is an intermediate in chemical manufacturing, a moth repellent, a fungicide, and a pollutant from the incomplete combustion of fossil fuels. [read more]

The Most Polluted Communities in Delaware

9 water utilities reported detecting Naphthalene in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Naphthalene level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Georgetown Water Department
Georgetown, DE
6,0001 of 50.05 ppb
(0 to 0.27 ppb)
2Stockley Center
Georgetown, DE
4501 of 50.03 ppb
(0 to 0.15 ppb)
3Willow Tree Trailer and Mobile Home Park
Dover, DE
1411 of 60.02 ppb
(0 to 0.1 ppb)
4Newark Water Department
Newark, DE
36,1301 of 210.01 ppb
(0 to 0.25 ppb)
5Long Neck Water Company
Long Neck, DE
14,8201 of 11< 0.01 ppb
(0 to 0.08 ppb)
6Dagsboro Water Dept
DE
5001 of 27< 0.01 ppb
(0 to 0.18 ppb)
7Selbyville Water Department
Selbyville, DE
1,6451 of 23< 0.01 ppb
(0 to 0.1 ppb)
8Artesian Water Company
Newark, DE
201,0001 of 138< 0.01 ppb
(0 to 0.14 ppb)
9Millsboro Water Department
Millsboro, DE
2,3002 of 95< 0.01 ppb
(0 to 0.03 ppb)

Health Based Limits for Naphthalene

StandardDescriptionLevel
Lifetime health-based limit, non-cancer riskConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for a lifetime of exposure. The Lifetime health-based limit (or Health Advisory, HA) is based on exposure for a a 70-kg adult consuming 2 liters of water per day. Source: U.S. Environmental Protection Agency.100 ppb
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.100 ppb
Children's health-based limit for 1-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic health effects for up to one day of exposure. The One-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.500 ppb
Children's health-based limit for 10-day exposureConcentration of a chemical in drinking water that is not expected to cause any adverse, noncarcinogenic effects for up to ten days of exposure. The Ten-Day health-based limit (or Health Advisory, HA) is typically set to protect a 10-kg child consuming 1 liter of water per day. Source: U.S. Environmental Protection Agency.500 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.700 ppb

Violation Summary for Naphthalene in Delaware

There are no violations reported for this contaminant in Delaware