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.
| State | Water Suppliers with Prometryn contamination | |
|---|---|---|
| Systems | Population | |
| California | 1 | 103,414 |
| Total | 1 | 103,414 |
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
| Rank | System | Population Served | Positive test results of total reported tests | Average Level (Range) |
|---|---|---|---|---|
| 1 | Rancho California Water District Temecula, CA | 103,414 | 1 of 37 | 0.06 ppb (0 to 2.3 ppb) |
Health Based Limits for Prometryn
| Standard | Description | Level |
|---|---|---|
| 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. | 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 |