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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.

StateWater Suppliers with n-Nitroso di-N-Propylamine contamination
SystemsPopulation
California157,000
Total157,000

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

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Monterey Park-City, Water Dept.
Monterey Park, CA
57,0001 of 12< 0.01 ppb
(< .01 to 0.000667 ppb)

Health Based Limits for n-Nitroso di-N-Propylamine

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.<0.01 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