| 2B3T | Two-bed, three-tower pure water system |
| 2CP | 2-Chlorophenol |
| 2NP | 2-Nitrophenol |
| 4CP | 4-Chlorophenol |
| 4NP | 4-Nitrophenol |
| AC | Activated carbon |
| AE | Alkyl ethoxylate |
| AEO | Alcohol ethoxylate |
| AOM | Algal organic matter |
| AOP | Advanced oxidation process |
| APA | Aromatic polyamide |
| APEO | Alkylphenol ethoxylate |
| ATD | Anti-telescoping device |
| ATP | Adenosine triphosphate |
| ATR | Attenuated total reflection |
| BAC | Benzalkonium chloride |
| BPA | Bisphenol A |
| BSA | Bovine serum albumin |
| BTEX | Benzene, Toluene, Ethylbenzene, and Xylenes |
| BWRO | Brackish water reverse osmosis |
| CA | Cellulose acetate |
| CAPB | Cocamidopropyl betaine |
| CEB | Chemical-enhanced backwash |
| CF | Cartridge filter |
| CIP | Cleaning in place |
| CMC | Critical micelle concentration |
| COD | Chemical oxygen demand |
| CTA | Cellulose triacetate |
| CTAB | Cetyltrimethylammonium bromide |
| CTBD | Cooling tower blowdown |
| DBP | Disinfection by-product |
| DCHP | Dicyclohexyl phthalate |
| DCP | 2,4-Dichlorophenol |
| DEHP | Di-2-ethylhexyl phthalate |
| DEP | Diethyl phthalate |
| DMAc | N,N-Dimethylacetamide |
| DMF | N,N-Dimethylformamide |
| DMP | Dimethyl phthalate |
| DMSO | Dimethyl sulfoxide |
| DnBP | Dibutyl phthalate |
| DNP | 2, 4-Dinitrophenol |
| DO | Dissolved oxygen |
| DOC | Dissolved organic carbon |
| DOM | Dissolved organic matter |
| DOP | Dioctyl phthalate |
| DP | Differential pressure |
| DTAB | Dodecyltrimethylammonium bromide |
| ED | Electrodialysis |
| EDTA | Ethylenediaminetetraacetic acid |
| EfOM | Effluent organic matter |
| EG | Ethylene glycol |
| EPS | Extracellular polymeric substances |
| ESCA | Electron spectroscopy for chemical analysis |
| FPD | Flat panel display |
| FRP | Fiber-reinforced plastic |
| FT-IR | Fourier transform infrared spectroscopy |
| GAC | Granular activated carbon |
| GC | Gas chromatography |
| gfd | Gallons/ft2/day |
| GWRS | Groundwater Replenishment System |
| HA | Humic acid |
| HEM | n-Hexane Extractable Material |
| HLB | Hydrophilic-Lipophilic Balance |
| HPM | High-pressure membrane |
| HPO | Hydrophobic |
| ICP | Inductively coupled plasma |
| ICR | Information Collection Rule |
| IEX | Ion exchange |
| IR | Infrared |
| LAS | Linear alkyl benzene sulfonate |
| LBL | Layer-by-layer |
| LC-OCD | Liquid chromatography—organic carbon detection |
| LES | Lauryl ether sulfate |
| LMH | L/m2/h |
| LMW | Low molecular weight |
| LMWOCs | Low molecular weight organic compounds |
| Log Dow | Logarithm of the pH-dependent n-octanol/water distribution coefficient |
| Log P | Logarithm of the octanol-water partition coefficient |
| LOI | Loss on ignition |
| LP | Low pressure |
| LPM | Low-pressure membrane |
| MBR | Membrane bioreactor |
| MF | Microfiltration |
| MFI | Modified Fouling Index |
| MPD | m-phenylenediamine |
| MS | Membrane softening |
| MTCw | Water mass transfer coefficients |
| MWCO | Molecular weight cut-off |
| NDMA | N-nitrosodimethylamine |
| NF | Nanofiltration |
| NMP | N-methyl-2-pyrrolidinone |
| NOM | Natural organic matter |
| NP | Nitrophenol |
| OCWD | Orange County Water District |
| O&G | Oil and grease |
| O&M | Operation and maintenance |
| PA | Polyamide |
| PAC | Powdered activated carbon |
| PALS | Positron annihilation lifetime spectroscopy |
| PAN | Polyacrylonitrile |
| PEG | Polyethylene glycol |
| PEI | Polyethyleneimine |
| PEO | Polyethylene oxide |
| PES | Polyether sulfone |
| PFAS | Perfluoroalkyl substances |
| PFOS | Perfluorooctane sulfonate |
| PG | Propylene glycol |
| PHE | Phenol |
| pKa | Acid dissociation constant |
| PMSP | Poly(1-(trimethylsilyl)-1-propyne) |
| POE | Polyoxyethylene octyl phenyl ether |
| polyDADMAC | Polydiallyldimethylammonium chloride |
| PPA | Piperazine polyamide |
| PPCPs | Pharmaceuticals and personal care products |
| PPO | Polyphenylene oxide |
| PSF | Polysulfone |
| PT-A | Polyvinyl methyl ether |
| PT-B | Tannic acid |
| PV | Pervaporation |
| PVDF | Polyvinylidene fluoride |
| RBSMT | Rapid bench-scale membrane test |
| RO | Reverse osmosis |
| SDBD | Sodium dodecyl benzenesulfonate |
| SDGs | Sustainable development goals |
| SDI | Silt density index |
| SDS | Sodium dodecyl sulfate |
| SEM | Scanning electron microscopy |
| SMPs | Soluble microbial products |
| SO | Sodium oleate |
| SOC | Synthetic organic compound |
| SULP | Super ultra-low pressure |
| SWRO | Seawater reverse osmosis |
| TBP | Tributyl phosphate |
| TCP | 2,4,6-trichlorophenol |
| TDS | Total dissolved solids |
| TEP | Transparent exopolymer particles |
| TFC | Thin-film composite |
| TFN | Thin-film nanocomposite |
| TGA | Thermo gravimetric analysis |
| TMC | Trimesoyl chloride |
| TMP | Transmembrane pressure |
| TOC | Total organic carbon |
| TPI | Transphilic |
| UF | Ultrafiltration |
| ULP | Ultra low-pressure |
| UPW | Ultra-pure water |
| USEPA | US Environmental Protection Agency |
| XAD | Polymeric adsorbent resin |
| WBMWD | West Basin Municipal Water District |
| WF-21 | Water Factory 21 |
| WOCS | Weathered oil-contaminated seawater |