| #D001 | | SWPA | source water protection area | high |
| #D002 | | DWMAPS | Drinking Water Mapping Application to Protect Source Waters | high |
| #D003 | | SDWIS | Safe Drinking Water Information System | high |
| #D004 | | NPDES | National Pollution Discharge Elimination System | high |
| #D005 | | TRI | Toxic Release Inventory | high |
| #D006 | | ECHO | Enforcement and Compliance Online | high |
| #D007 | | RCRAInfo | Resource Conservation and Recovery Act Information | high |
| #D008 | | SWP | Source Water Protection | high |
| #D009 | | source water protection area (SWPA) | the area to be assessed and protected based on where the public water system draws drinking water supplies. | high |
| #D010 | | contaminant source inventory | lists all documented and potential contaminant sources or activities of concern within the SWPA that may pose a threat to drinking water supplies. | high |
| #D011 | | action plan | long-term management strategies for preventing contamination of sources of drinking water. | high |
| #D012 | | Drinking Water Mapping Application to Protect Source Waters (DWMAPS) | an online mapping tool for source water assessment and planning. | high |