N.M. Code R. § 20.6.2.4105
A. Except as provided in Subsection B of this Section, Sections 20.6.2.4104 and 20.6.2.4106 NMAC do not apply to a person who is abating water pollution:
C. Sections 20.6.2.4104 and 20.6.2.4106 NMAC do not apply to the following activities:
(4) Reasonable operation and maintenance of irrigation and flood control facilities.
[12-1-95; 20.6.2.4105 NMAC - Rn, 20 NMAC 6.2.IV.4105, 1-15-01; A, 10-15-03; A, 12-21-18]