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National Drinking Water Database


Total haloacetic acids (HAAs) in Delaware


Total haloacetic acids refers to the sum of the concentrations of five related disinfection byproducts in a water sample: dichloroacetic acid, trichloroacetic acid, monochloroacetic acid, monobromoacetic acid and dibromoacetic acid. [read more]

The Most Polluted Communities in Delaware

115 water utilities reported detecting Total haloacetic acids (HAAs) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Total haloacetic acids (HAAs) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Frankford Water Department
Frankford, DE
90012 of 1248.76 ppb
(6.1 to 116 ppb)
2Pepper Ridge Park
DE
1808 of 843.8 ppb
(5.6 to 120 ppb)
3Mallard Lakes
Selbyville, DE
9005 of 543.78 ppb
(32.2 to 49.4 ppb)
4United Water Delaware
Wilmington, DE
105,27018 of 1832.65 ppb
(13.07 to 48.6 ppb)
5Cedar Landing
Newark, DE
32016 of 1631.98 ppb
(6.5 to 46 ppb)
6South Bethany
Newark, DE
12,00020 of 2029.37 ppb
(1.4 to 67.35 ppb)
7Sea Winds
Dover, DE
1056 of 827.43 ppb
(0 to 96.7 ppb)
8Selbyville Water Department
Selbyville, DE
1,6457 of 726.84 ppb
(9.3 to 56.7 ppb)
9Bethany Beach Water Department
Bethany Beach, DE
12,1288 of 925.89 ppb
(0 to 112 ppb)
10Cooper Farms
Dover, DE
2043 of 324.13 ppb
(18.1 to 29 ppb)

Health Based Limits for Total haloacetic acids (HAAs)

StandardDescriptionLevel
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.0.7 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.60 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.70 ppb
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.70 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.450 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.5200 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.5200 ppb

Violation Summary for Total haloacetic acids (HAAs) in Delaware

Data from the U.S. Environmental Protection Agency includes the following violations of federal standards in Delaware since 2004

Violation TypeNumber of Violations
Over maximum contaminant level, Average1