National Drinking Water Database
National Drinking Water Database - Chemical Contaminants
n-Nitroso di-N-Propylamine
Status: Unregulated - EPA has not established a maximum legal limit in tapwater for this contaminant.
n-Nitroso di-N-propylamine is a synthetic chemical detected as a contaminant in certain herbicides such as Trifluralin and in extruded rubber products; it is discharged with wastewater from chemical plants.
Detected |
Found above health guidelines |
Found above legal limit |
|
|---|---|---|---|
| States | 1 |
- |
- |
| Water utilities | 1 |
- |
- |
| People Served | 57,000 |
- |
- |
n-Nitroso di-N-Propylamine Exposure by State
Water utilities in 1 states have reported detecting n-Nitroso di-N-Propylamine in treated tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies.
| State | Water Suppliers with n-Nitroso di-N-Propylamine contamination | |
|---|---|---|
| Systems | Population | |
| California | 1 | 57,000 |
| Total | 1 | 57,000 |
The Most Polluted Communities
1 water utilities reported detecting n-Nitroso di-N-Propylamine in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies
Ranked by highest average n-Nitroso di-N-Propylamine level
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Monterey Park-City, Water Dept. Monterey Park, CA | 57,000 | 1 of 12 | < 0.01 ppb (< .01 to 0.000667 ppb) |
Health Based Limits for n-Nitroso di-N-Propylamine
| 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. | <0.01 ppb-0.5 ppb |
Testing Summary for n-Nitroso di-N-Propylamine
| Are tests routinely required for n-Nitroso di-N-Propylamine by federal law? | No |
| Water suppliers reporting tests for n-Nitroso di-N-Propylamine (2004-2009): | 48 of 47,576 |
| Average testing rate for water supplier reporting tests (2004-2009): | 0.7 per year |