USGS Data Series 423
National Water-Quality Assessment Program
| ACFB | Apalachicola-Chattahoochee-Flint River Basin |
| ADAS | Algal Data Analysis System |
| AFDM | ash-free dry mass |
| AhR | aryl hydrocarbon receptor |
| ALBE | Albemarle-Pamlico Drainage Basin |
| ATL | Atlanta, Georgia |
| BIR | Birmingham, Alabama |
| BOS | Boston, Massachusetts |
| CA | correspondence analysis |
| Chl a | chlorophyll a |
| D50 | mean particle size |
| DEN | Denver, Colorado |
| DFW | Dallas-Fort Worth, Texas |
| DPAC | distribute parents among children |
| DTH | depositional-targeted habitat |
| EC50 | 50-percent effect concentration |
| EUSE | Effects of Urbanization on Stream Ecosystems |
| GIS | geographic information system |
| GRSL | Great Salt Lake Basins |
| HDAS | Habitat Data Analysis System |
| IDAS | Invertebrate Data Analysis System |
| LC50 | 50-percent lethal concentration |
| MA-NUII | metropolitan area national urban intensity index |
| MA-UII | metropolitan area urban intensity index |
| MDS | multi-dimensional scaling |
| MGB | Milwaukee-Green Bay, Wisconsin |
| MOBL | Mobile River Basin |
| NAWQA | National Water-Quality Assessment |
| NCDENR | North Carolina Department of Environment and Natural Resources |
| NECB | New England Coastal Basins |
| NLCD01 | National Land Cover Data 2001 |
| nMDS | nonparametric multi-dimensional scaling |
| NPDES | National Pollutant Discharge Elimination System |
| NUII | national urban intensity index |
| NWQL | National Water Quality Laboratory |
| PAH | polycyclic aromatic hydrocarbons |
| PCA | principal components analysis |
| PCB | polychlorinated biphenyls |
| POR | Portland, Oregon |
| PR | period of record |
| PTI | pesticide toxicity index |
| QMH | qualitative multi-habitat |
| qualitative richness dataset | |
| RAL | Raleigh, North Carolina |
| RPKC | remove parent keep child |
| RTH | richest targeted habitat |
| SD | standard deviation |
| SLC | Salt Lake City, Utah |
| SPLT | South Platte River Basin |
| SPMD | semipermeable membrane device |
| TIGER | Topologically Integrated Geographic Encoding and Referencing |
| TRI | Toxic Release Inventory |
| TRIN | Trinity River Basin |
| UII | urban intensity index |
| USEPA | U.S. Environmental Protection Agency |
| USGS | U.S. Geological Survey |
| UV | ultraviolet |
| WILL | Willamette River Basin |
| WMIC | Western Lake Michigan Drainages |