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.
| State | Water Suppliers with para-para DDD contamination | Water suppliers reporting para-para DDD above health-based limits | ||
|---|---|---|---|---|
| Systems | Population | Systems | Population | |
| Delaware | 1 | 201,000 | 1 | 201,000 |
| Total | 1 | 201,000 | 1 | 201,000 |
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
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Artesian Water Company Newark, DE | 201,000 | 1 of 83 | < 0.01 ppb (0 to 0.02 ppb) |
Health Based Limits for para-para DDD
| Standard | Description | Level |
|---|---|---|
| EPA Human Health Water Quality Criteria | Water 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 Level | A 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 |