Advanced testing methods now allow pesticides to be detected in water at very low levels. These small amounts of pesticides detected in drinking water or source water for drinking water do not necessarily indicate a health risk.
The EPA has developed human health benchmarks for approximately 350 pesticides to enable our partners to better determine whether the detection of a pesticide in drinking water or source waters for drinking water may indicate a potential health risk.
The table below includes benchmarks for acute (one-day) and chronic (lifetime) exposures for the most sensitive populations from exposure to pesticides that may be found in surface or ground water sources of drinking water. Concentrations of pesticides in drinking water that have the potential for cancer risk are not currently included in the HHBP table. However, EPA intends to include these concentrations later. The HHBP table includes pesticide active ingredients for which Health Advisories or enforceable National Primary Drinking Water Regulations (e.g., maximum contaminant levels) have not been developed. View Drinking Water Health Advisories
These HHBP values are provided to help states interpret drinking water monitoring data. If a water sample exceeds an HHBP, the state should consider how frequently the HHBP is exceeded and the magnitude of the exceedance in other samples. Such information may be helpful for states to determine how to respond to monitoring results and prioritize resources.
Common Name and
Acute One Day
|2, 4 - DB DMA||2758-42-1||0.600||19800||Females 13-49 years||0.030||210||General Population|
|2, 4 - DBA||94-82-6||0.600||19800||Females 13-49 years||0.030||210||General Population|
|2,4-DP-p Salts & Esters||15165-67-0||0.050||500||Children||0.036||252||General Population|
|2,6-Dichlorobenzamide (BAM)||2008-58-4||0.030||990||Females 13-49 years||0.0045||32||General Population|
|Abamectin||71751-41-2, 65195-55-3||0.005||50||Children||0.0004||3||General Population|
|Acibenzolar-methyl||135158-54-2||0.082||2706||Females 13-49 years||0.082||541||Females 13-49 years|
|Aluminum phosphide||20859-73-8||0.018||180||Children||0.0113||79||General Population|
|Aminocyclopyrachlor||858956-08-8, 858956-35-1, 858954-83-3, 124423-84-3, 1759-53-1||-||-||0.350||2450||General Population|
a Formula for deriving Acute HHBP = [aRfD (mg/kg bw/day) x BW (kg) x 1000 (µg/mg)] / [Drinking Water Intake (L/day)] where BW=10 kg for children and 66 kg for females 13-49 years and Drinking Water Intake = 1L/day for children and 2L/day for females 13-49 years
b Formula for deriving Chronic HHBP = [cRfD (mg/kg bw/day) x BW (kg) x 1000 (µg/mg) x 0.2 RSC ] / [Drinking Water Intake (L/day)] where BW=70 kg for general population and 66 kg for females 13-49 years and Drinking Water Intake = 2L/day for general population as well as for females 13-49 years and RSC = Relative Source Contribution assumed as 20%
c For pesticide registration, an additional 10x FQPA factor is applied, which is not included in the RfD and HHBP calculations.
d For pesticide registration, an additional 3x FQPA factor is applied, which is not included in the RfD and HHBP calculations.