The Power of Information

National Drinking Water Database

n-Nitrosodimethylamine in Illinois

n-Nitrosodimethylamine is a carcinogenic water contaminant released from various industrial processes; it also forms in drinking water as disinfection byproduct of chloramination and from agricultural runoff.

The Most Polluted Communities in Illinois

4 water utilities reported detecting n-Nitrosodimethylamine in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average n-Nitrosodimethylamine level

RankSystem Population Served Positive test results of total reported tests Average Level
Carlinville, IL
5,6852 of 30.02 ppb
(0 to 0.05 ppb)
2IL American-East ST Louis
Creve Coeur, IL
155,3822 of 30.01 ppb
(0 to 0.03 ppb)
Moline, IL
44,7183 of 3< 0.01 ppb
(<0.01 to 0.01 ppb)
Litchfield, IL
6,8151 of 1< 0.01 ppb
(< .01 to 0.0043 ppb)

Health Based Limits for n-Nitrosodimethylamine

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-0.07 ppb
California Public Health GoalsDefined by the State of California Office of Environmental Health Hazard Assessment (OEHHA) as the level of contaminant that is allowed in drinking water. For acutely toxic substances, levels are set at which scientific evidence indicates that no known or anticipated adverse effects on health will occur, plus an adequate margin-of safety. PHGs for carcinogens or other substances which can cause chronic disease shall be based solely on health effects without regard to cost impacts and shall be set at levels which OEHHA has determined do not pose any significant risk to health.<0.01 ppb

Violation Summary for n-Nitrosodimethylamine in Illinois

There are no violations reported for this contaminant in Illinois