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National Drinking Water Database


National Drinking Water Database - Chemical Contaminants

Prometryn


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

Prometryn is an herbicide applied to various food and feed crops, primarily cotton and celery; it has been detected in groundwater in agricultural areas in California.

 
Detected
Found above
health guidelines
Found above
legal limit
States
1
-
-
Water utilities
1
-
-
People Served
103,414
-
-

Prometryn Exposure by State

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

StateWater Suppliers with Prometryn contamination
SystemsPopulation
California1103,414
Total1103,414

The Most Polluted Communities

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

Ranked by highest average Prometryn level

RankSystem Population Served Positive test results of total reported tests Average Level
(Range)
1Rancho California Water District
Temecula, CA
103,4141 of 370.06 ppb
(0 to 2.3 ppb)

Health Based Limits for Prometryn

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.300 ppb

Testing Summary for Prometryn

Are tests routinely required for Prometryn by federal law?No
Water suppliers reporting tests for Prometryn (2004-2009):1,053 of 47,576
Average testing rate for water supplier reporting tests (2004-2009):0.5 per year