| Borehole (BH) |
| Injection Well (IW) |
| Monitoring Well (MW) |
| Monitoring - Observation (OB) |
| Monitoring - Test (T) |
| Monitoring - Vapor (VW) |
| Plugged and Abandoned (PA) |
| Pneu-Log Well (PnL) |
| Production - Unknown (P) |
| Production - Potable (Pd) |
| Production - Abandoned (PdA) |
| Production - Out of Commission (PdO) |
| Production - Non-Potable (Px) |
| Remediation Well (RWL) |
| Spring (Sp) |
| Unknown Purpose (U or Blank Type) |