| ResQualCode | ResQualName | ResQualDescr |
| < | Less Than | Less Than |
| <= | Less than or equal to | Less than or equal to |
| = | Equal To | Equal To |
| > | Greater Than | Greater Than |
| >= | Greater than or equal to | Greater than or equal to |
| A | Absent | Absent |
| DNQ | Detected Not Quantifiable | Detected Not Quantifiable |
| JF | Field Estimated | Field value is estimated, when direct measurements can not be performed |
| NA | Not Analyzed | Not Analyzed |
| ND | Not Detected | Not Detected |
| NR | Not Recorded | Not Recorded |
| NRS | No Reportable Sum | No reportable sum since compounds generally comprising a significant portion of the sum are not quantifiable; therefore, the sum is not calculated. |
| NRT | No Reportable Total | No reportable total since either the dissolved or particulate fraction is not available; therefore a total value cannot be calculated. |
| NSI | No Surviving Individuals | No Survival of related endpoint |
| P | Present | Present |
| PA | Present/Absent | Present/Absent |