5 Colo. Code Regs. § 1002-61.68
The provisions of 25-8-202(1)(d) and (2), 25-8-401, 25-8-501, and 25-8-504, C.R.S., provide the specific statutory authority for the amendments to this regulation adopted by the Water Quality Control Commission (Commission). The Commission has also adopted, in compliance with 24-4-103(4) C.R.S., the following statement of basis and purpose.
BASIS AND PURPOSE
In coordination with the development of Regulation #86, the commission adopted an exemption from the ground water discharge provisions of Regulation #61 for certain graywater treatment works. The commission believes that graywater subsurface irrigation systems with a design flow of 2,000 gallons per day or less pose a similar risk to ground water as on-site wastewater treatment systems with a design capacity of 2,000 gallons per day or less, which currently has an exemption from ground water permitting in Regulation #61, and that a similar exemption for graywater treatment systems is appropriate as a matter of policy.
5 CCR 1002-61.68