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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

para-para DDD


Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.

para-para DDD is an insecticide similar to DDT, and also forms as a metabolite of DDT, a toxic and persistent insecticide banned in the U.S. and most other countries.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
1
-
Water utilities
1
1
-
People Served
201,000
201,000
-

para-para DDD Exposure by State

Water utilities in 1 states have reported detecting para-para DDD in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.

StateWater Suppliers with para-para DDD contaminationWater suppliers reporting para-para DDD above health-based limits
SystemsPopulationSystemsPopulation
Delaware1201,0001201,000
Total1201,0001201,000

The Most Polluted Communities

1 water utilities reported detecting para-para DDD in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average para-para DDD level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Artesian Water Company
Newark, DE
201,0001 of 83< 0.01 ppb
(0 to 0.02 ppb)

Health Based Limits for para-para DDD

StandardDescriptionLevel
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.<0.01 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.0.1 ppb-10 ppb

Testing Summary for para-para DDD

Are tests routinely required for para-para DDD by federal law?No
Water suppliers reporting tests for para-para DDD (2004-2009):1,758 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.2 per year