| EventCode | EventName | EventDescr |
| BA | Bioassessment | Data grouping for bioassessment collections |
| NONENV | NonEnvironmental | Data grouping for non environmental collections. |
| TI | Tissue Analysis | Data grouping for tissue collections |
| TS | TimeSeries | Regular interval time series data |
| WQ | Water Quality | Data grouping for water, sediment, toxicity, and benthic abundance collections |