Picloram
EPA Designation Regulated
EPA Classification Organic Chemicals
EPA Levels 1,2 0.5 MCLG (mg/L)
0.5 MCLG (mg/L)
Alternative Names none
Sources Herbicide runoff
Picloram is an herbicide that may contaminate drinking water sources due to runoff from applications to pasture, rangeland and rights-of-way.

Overview

Picloram, a synthetic organic chemical, is a crystalline organic solid with a chlorine odor.

Uses

Picloram is used in salt form as a systemic herbicide for controlling annual weeds in crops, and in combination with 2,4-D or 2,4,5-T against perennials on non-croplands for brush control.

Health Effects

Some people who drink water containing picloram well in excess of the maximum contaminant level (MCL) for many years could experience liver problems.

EPA Data Source: Picloram

EPA Definitions:

1Maximum Contaminant Level Goal (MCLG) - The level of a contaminant in drinking water below which there is no known or expected risk to health. MCLGs allow for a margin of safety and are non-enforceable public health goals.

Maximum Contaminant Level (MCL) - The highest level of a contaminant that is allowed in drinking water. MCLs are set as close to MCLGs as feasible using the best available treatment technology and taking cost into consideration. MCLs are enforceable standards.

Maximum Residual Disinfectant Level Goal (MRDLG) - The level of a drinking water disinfectant below which there is no known or expected risk to health. MRDLGs do not reflect the benefits of the use of disinfectants to control microbial contaminants.

(TT) Treatment Technique - A required process intended to reduce the level of a contaminant in drinking water.

Maximum Residual Disinfectant Level (MRDL) - The highest level of a disinfectant allowed in drinking water. There is convincing evidence that addition of a disinfectant is necessary for control of microbial contaminants.

2 Units are in milligrams per liter (mg/L) unless otherwise noted. Milligrams per liter are equivalent to parts per million.