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National Drinking Water Database


Bromoform in Delaware


Bromoform is a disinfection byproduct from the trihalomethane (THM) family, and is formed when chlorine, chloramines or other disinfectants react with organic and inorganic matter in water. [read more]

The Most Polluted Communities in Delaware

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

Ranked by highest average Bromoform level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Dewey Beach Water Department
DE
22,4008 of 82.51 ppb
(0.88 to 4.1 ppb)
2Fishermans Village
Milford, DE
363 of 42.51 ppb
(0 to 6.2 ppb)
3Lewes Board of Public Works
Lewes, DE
9,2004 of 112.16 ppb
(0 to 11.3 ppb)
4Fox Pointe Subdivision
Dover, DE
3004 of 61.41 ppb
(0 to 6.48 ppb)
5New Castle Water Department
New Castle, DE
6,0003 of 41.3 ppb
(0 to 2.16 ppb)
6Delmar Utility Comm (Tn of Delmar)
Delmar, DE
3,2662 of 31.13 ppb
(0 to 2.4 ppb)
7Smyrna Water Department
Smyrna, DE
10,0014 of 121.12 ppb
(0 to 8.91 ppb)
8Town of Henlopen Acres
Rehoboth, DE
9993 of 31.04 ppb
(1 to 1.1 ppb)
9Stockley Center
Georgetown, DE
4504 of 41.04 ppb
(0.81 to 1.31 ppb)
10Bethany Bay Ocean View
Dover, DE
27,1064 of 80.98 ppb
(0 to 2.68 ppb)

Health Based Limits for Bromoform

StandardDescriptionLevel
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.0 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.4.3 ppb
One in one million (10-6) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 1,000,000. Source: U.S. Environmental Protection Agency.8 ppb
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.80 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.200 ppb
One in ten thousand (10-4) Cancer RiskThe concentration of a chemical in drinking water corresponding to an excess estimated lifetime cancer risk of 1 in 10,000. Source: U.S. Environmental Protection Agency.800 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.1000 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.5000 ppb

Violation Summary for Bromoform in Delaware

There are no violations reported for this contaminant in Delaware