| CCSR | Corrosion control study required. |
| CCSC | Corrosion control study completed. |
| CU90 | Copper 90th percentile action level* exceedence. |
| DEEM | System deemed optimized without Optimal Corrosion Control Treatment. |
| DONE | System done with Optimal Corrosion Control Treatment. |
| LSLR | Lead service line replacement required. |
| MPLS | Maximum permissible levels in source water. |
| OTDE | Optimal Corrosion Control Treatment designated and approved. |
| OTIN | Optimal Corrosion Control Treatment installed. |
| PB90 | Lead 90th percentile action level* exceedence. |
| STDE | Source Water Treatment designated and approved. |
| STIN | Source Water Treatment installed. |
| WQPS | Water quality parameters. |
| MIF | Must install filtration. |