The criteria for warmwater marginal fish life propagation waters and their allowable variations that are not included under § 74:51:01:55 and Appendix B, unless set under § 74:51:01:24, are as found in the following table:

Parameter

Criteria

Unit of Measure

Special Conditions

Total ammonia nitrogen as N

Equal to or less than the result from Equation 3 in Appendix A

mg/L

30-day average

Equal to or less than the result from Equation 2 in Appendix A

mg/L

daily maximum

Dissolved oxygen as measured anywhere in the water column of a non-stratified water body, or in the epilimnion and metalimnion of a stratified water body

> 4.0

mg/L

daily minimum October 1 - April 30

> 5.0

mg/L

daily minimum May 1 - September 30

Undisassociated hydrogen sulfide

< 0.002

mg/L

daily maximum

pH

> 6.0 - < 9.0

units

see § 74:51:01:07

Total Suspended Solids

< 150

mg/L

30-day average

< 263

mg/L

daily maximum

Temperature

< 90

°F

see § 74:51:01:31

Source: SL 1975, ch 16, § 1; 4 SDR 32, effective December 4, 1977; 5 SDR 21, effective September 21, 1978; transferred from § 34:04:02:38, effective July 1, 1979; 10 SDR 145, effective July 4, 1984; 13 SDR 129, 13 SDR 141, effective July 1, 1987; 19 SDR 111, effective January 31, 1993; transferred from § 74:03:02:38, July 1, 1996; 24 SDR 10, effective July 20, 1997; 31 SDR 29, effective September 13, 2004; 35 SDR 253, effective May 12, 2009 ; 47 SDR 110, effective April 27, 2021 .

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

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

Prior versions effective: 2009-05-12.