<html> <head> <title>Rule 74:51:01:0A Total Ammonia Criteria.</title> <META NAME="Keywords" Content="Administrative Rules 74:51:01:0A"> <META NAME="Description" Content="Administrative Rules 74:51:01:0A Total Ammonia Criteria."> <meta http-equiv=Content-Type content="text/html; charset=windows-1252"> <meta name=Generator content="Microsoft Word 15 (filtered)"> <title>DEPARTMENT OF ENVIRONMENT AND NATURAL RESOURCES</title> <style> <!-- /* Font Definitions */ @font-face {font-family:"Cambria Math"; panose-1:2 4 5 3 5 4 6 3 2 4;} @font-face {font-family:Times; panose-1:2 2 6 3 5 4 5 2 3 4;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {margin:0in; font-size:10.0pt; font-family:"Times",serif;} .MsoChpDefault {font-size:10.0pt;} @page WordSection1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in;} div.WordSection1 {page:WordSection1;} --> </style> </head> <body lang=EN-US link=blue vlink=purple style='word-wrap:break-word'> <div class=WordSection1> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>DEPARTMENT OF </span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>AGRICULTURE</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> AND NATURAL RESOURCES</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>WATER POLLUTION CONTROL PROGRAM</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>TOTAL AMMONIA CRITERIA</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Chapter 74:51:01</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>APPENDIX A</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>SEE: &#167;</span><span style='font-size:12.0pt'> </span><span style='font-size:12.0pt;font-family: "Times New Roman",serif'>74:51:01:22</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; <b>Source:</b> Effective November 14, 1980; transferred from Chapter 74:03:02, Appendix A, July 1, 1996; transferred from Chapter 74:51:01, Appendix C, 24 SDR 10, effective July 20, 1997; 31 SDR 29, effective September 13, 2004; 35 SDR 253, effective May 12, 2009</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>; 47 SDR 110, effective April 27, 2021</span><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>.</span></p> <span style='font-size:10.0pt;font-family:"Times New Roman",serif'><br clear=all style='page-break-before:always'> </span> <p class=MsoNormal align=center style='text-align:center'><b><span style='font-size:12.0pt;font-family:"Times New Roman",serif;text-transform: uppercase'>APPENDIX A to Chapter 74:51:01</span></b></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal align=center style='text-align:center'><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;</span></p> <table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0 style='margin-left:9.9pt;border-collapse:collapse;border:none'> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-bottom:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>Equation 1:&nbsp; </span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Acute criterion for</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> waters where salmonid fish are present.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>MIN(((0.275/(1+10<sup>7.204-pH</sup>))+(39/(1+10<sup>pH-7.204</sup>))),(0.7249*((0.0114/(1+10^<sup>7.204-pH</sup>))+(1.6181/(1+10^<sup>pH-7.204</sup>)))*(23.12*10^<sup>0.036*(20-T)</sup>)))</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-top:none;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>MIN = use either the value of (((0.275/(1+10<sup>7.204-pH</sup>))+(39/(1+10<sup>pH-7.204</sup>))) or the value of (0.7249*((0.0114/(1+10^<sup>7.204-pH</sup>))+(1.6181/(1+10^<sup>pH-7.204</sup>)))*(23.12*10^<sup>0.036*(20-T)</sup>))), whichever is the smaller value.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>T = the water temperature of the sample in degrees Centigrade.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>pH = the pH of the water quality sample in standard units.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> </table> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0 style='margin-left:9.9pt;border-collapse:collapse;border:none'> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-bottom:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>Equation 2:&nbsp; </span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Acute criterion for</span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'> waters where salmonid fish are not present.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>0.7249*(((0.0114/(1+10<sup>7.204-pH</sup>))+(1.6181/(1+10<sup>pH-7.204</sup>)))*MIN(51.93,23.12*10<sup>0.036*(20-T)</sup>)</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-top:none;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>MIN = use either 51.93 or the value of 23.12*10<sup>0.036*(20-T)</sup>, whichever is the smaller value.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>T = the water temperature of the sample in degrees Centigrade.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>pH - the pH of the water quality sample in standard units.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> </table> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <table class=MsoTableGrid border=1 cellspacing=0 cellpadding=0 style='margin-left:9.9pt;border-collapse:collapse;border:none'> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-bottom:solid windowtext 1.0pt;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>Equation 3:&nbsp; </span><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>Chronic criterion</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>0.8876*(((0.0278/(1+10<sup>7.688-pH</sup>))+(1.1994/(1+10<sup>pH-7.688</sup>)))*(2.126*10<sup>0.028*(20-MAX(T,7)</sup>))</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> <tr> <td width=630 valign=top style='width:472.5pt;border:double windowtext 1.5pt; border-top:none;padding:0in 5.4pt 0in 5.4pt'> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>T = the water temperature of the sample in degrees Centigrade.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>pH - the pH of the water quality sample in standard units.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>MAX = use either the water temperature (T) for the sample, or 7, whichever is the greater value.</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> </td> </tr> </table> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>&nbsp;</span></p> <p class=MsoNormal style='text-align:justify'><b><span style='font-size:12.0pt; font-family:"Times New Roman",serif'>Reference:</span></b><span style='font-size:12.0pt;font-family:"Times New Roman",serif'>&nbsp;&nbsp;Aquatic Life Ambient Water Quality Criteria for Ammonia  Freshwater 2013, EPA 822-R-13-001, April 2013.</span></p> <span style='font-size:12.0pt;font-family:"Times New Roman",serif'><br clear=all style='page-break-before:always'> </span> <p class=MsoNormal>&nbsp;</p> </div> </body> </html>