74:51:01:53Criteria for irrigation waters.

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.