The criteria of parameters for irrigation waters and the allowable variations that are not included under § 74:51:01:55 or Appendix B of this chapter, unless set under § 74:51:01:24, are as found in the following table:

Parameter

Criteria

Unit of Measure

Special Conditions

Conductivity at 25C

< 2,500

micromhos/cm

30-day average

< 4,375

micromhos/cm

daily maximum

Sodium adsorption ratio

< 10

see definition

The criteria set forth in this section are applicable from April first through October thirty-first.

Source: SL 1975, ch 16, § 1; 4 SDR 32, effective December 4, 1977; transferred from § 34:04:02:43, effective July 1, 1979; 10 SDR 145, effective July 4, 1984; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 14 SDR 86, effective December 24, 1987; 19 SDR 111, effective January 31, 1993; transferred from § 74:03:02:43, July 1, 1996; 24 SDR 10, effective July 20, 1997 ; 47 SDR 110, effective April 27, 2021; 49 SDR 96, effective May 14, 2023 .

General Authority: SDCL 34A-2-10 , 34A-2-11 , 34A-2-93 .

Law Implemented: SDCL 34A-2-10 , 34A-2-11 .

Prior versions effective: 2021-04-27, 1997-01-20.