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National Drinking Water Database


Chromium (total) in Delaware


Chromium is a metal that pollutes drinking water due to discharge from steel and pulp mills and erosion of natural deposits. [read more]

The Most Polluted Communities in Delaware

175 water utilities reported detecting Chromium (total) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Chromium (total) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Strimels Trailer Park
Dover, DE
401 of 110.2 ppb
(10.2 ppb)
2Holly View Mobile Home Park
Berlin, DE
2071 of 110 ppb
(10 ppb)
3Long Farm Estates
Dover, DE
1234 of 46.95 ppb
(1.6 to 11.4 ppb)
4Felton District
Dover, DE
1,1402 of 26.48 ppb
(4.4 to 8.55 ppb)
5Fox Pointe Subdivision
Dover, DE
3003 of 36.17 ppb
(2.5 to 9.6 ppb)
6Eds Mobile Home Park
Millsboro, DE
661 of 16.1 ppb
(6.1 ppb)
7Milton Water Department
Milton, DE
2,4001 of 15.85 ppb
(5.85 ppb)
8Rehoboth Bay Community
Rehoboth, DE
6252 of 25.8 ppb
(1.7 to 9.9 ppb)
9Swann Keys
Selbyville, DE
1,7641 of 15.6 ppb
(5.6 ppb)
10Donovan/Smith Mobile Home Park
Pittsford, DE
3692 of 25.35 ppb
(5 to 5.7 ppb)

Health Based Limits for Chromium (total)

StandardDescriptionLevel
Maximum Contaminant Limit (MCL)The enforceable standard which defines the highest level of a contaminant that is allowed in drinking water. MCLs are set as close to health-based limits (Maximum Contaminant Level Goals, or MCLGs) as feasible using the best available analytical and treatment technologies and taking cost into consideration. Source: U.S. Environmental Protection Agency.100 ppb
Maximum Contaminant Limit Goal (MCLG)A non-enforceable health goal that is set at a level at which no known or anticipated adverse effect on the health of persons occurs and which allows an adequate margin of safety. Source: U.S. Environmental Protection Agency.100 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.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.1000 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.1000 ppb

Violation Summary for Chromium (total) in Delaware

There are no violations reported for this contaminant in Delaware