Ground Water Quality Reference Points

01. Reference Points. The Director will use reference points for pesticides in ground water, based on the following order of availability: (3-31-22) a. Idaho rules of DEQ, IDAPA 58.01.11, Subsection 200.01.a. specific to pesticide primary constituent standards which were adopted from EPA MCLs; or (3-31-22) b. EPA Health Advisory Levels (HALs) identified in the 2006 Edition of the EPA Drinking Water Standards and Health Advisories, EPA 822-R-06-013; or (3-31-22) IDAHO ADMINISTRATIVE CODE IDAPA 02.03.01 – Pesticide Management Department of Agriculture Plans for Ground Water Protection Section 200 Page 5 c. EPA Reference Dose (RfD) identified in the 2006 Edition of the EPA Drinking Water Standards and Health Advisories, EPA 822-R-06-013; or (3-31-22) d. A reference point based on: (3-31-22) i. Best scientific information currently available on adverse effects of the contaminant(s); and (3-31-22) ii. Protection of a beneficial use(s); and (3-31-22) iii. Practical quantitation levels for the pesticides, if they exceed the levels identified in IDAPA 58.01.11, Subsection 200.01.a. (3-31-22) 02. HAL and RfD Guide. The Director shall use the EPA’s HAL and RfD number associated with the effects on a person weighing seventy (70) kilograms and drinking two (2) liters of water per day over a lifetime. (3-31-22) 151. – 199. (RESERVED)