| Acronym | Meaning |
| FSR | Fractional Synthesis Rate |
| EIMS | Environmental Information Management System |
| LCI-SCSCFMO | Limited Configuration Interaction Single-configuration SCF MO |
| ACSV | Adsorptive Cathodic Stripping Voltammetry |
| IMMA | Ion Microprobe Mass Analysis |
| FZP | Fresnel Zone Plate |
| CDI | Continuous Deionization |
| HGCU | Hot-gas Particulate Cleanup |
| BTV | Breakthrough Volume (sorption Capacity Measurement) |
| NAWDEX | National Water Data Exchange |