| Watershed | Sampling Method | Sample Date | Collector(s) | Determiner |
|---|---|---|---|---|
| Abrams Creek | observed | 2001-12-30 | SHoyle | SHoyle |
| Abrams Creek | observed | 2004-12-26 | SHoyle | SHoyle |
| Abrams Creek | observed | 2005-12-28 | SHoyle | SHoyle |
| Abrams Creek | observed | 2006-12-31 | SHoyle | SHoyle |
| Abrams Creek | observed | 2008-03-09 | SHoyle | SHoyle |
| Abrams Creek | observed | 2008-04-06 | SWilliams | SWilliams |
| Abrams Creek | observed | 2008-11-11 | WBielenberg | WBielenberg |
| Abrams Creek | observed | 2008-12-09 | WBielenberg | WBielenberg |
| Abrams Creek | observed | 2009-02-08 | SHoyle | SHoyle |
| Abrams Creek | observed | 2009-03-09 | SHoyle | SHoyle |
| Abrams Creek | observed | 2009-03-17 | WBielenberg | WBielenberg |
| Abrams Creek | observed | 2009-03-29 | WBielenberg | WBielenberg |
| Abrams Creek | observed | 2009-04-14 | SHoyle | SHoyle |
| Jonathan Creek (Purchase area) | observed | 2006-03-06 | PESuper | PESuper |
| Uncertain | observed | 1998-01-01 | unknown | FAlsop |