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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Parathion (ethyl)


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

Ethyl parathion is a highly toxic, restricted use organophosphate insecticide and miticide applied to alfalfa, barley, corn, cotton, canola, sorghum, soybean, sunflower, and wheat.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
1
-
Water utilities
1
1
-
People Served
2,840
2,840
-

Parathion (ethyl) Exposure by State

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

StateWater Suppliers with Parathion (ethyl) contaminationWater suppliers reporting Parathion (ethyl) above health-based limits
SystemsPopulationSystemsPopulation
Maine12,84012,840
Total12,84012,840

The Most Polluted Communities

1 water utilities reported detecting Parathion (ethyl) in tap water since 2004, according to EWG's analysis of water quality data supplied by state water agencies

Ranked by highest average Parathion (ethyl) level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Madawaska Water District
Madawaska, ME
2,8401 of 10.63 ppb
(0.63 ppb)

Health Based Limits for Parathion (ethyl)

StandardDescriptionLevel
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.0.02 ppb

Testing Summary for Parathion (ethyl)

Are tests routinely required for Parathion (ethyl) by federal law?No
Water suppliers reporting tests for Parathion (ethyl) (2004-2009):1,155 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.3 per year