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| Acronym | Acronym Meaning | Additional Information |
|---|---|---|
| WA | Work Assignment | |
| WADTF | Western Atmospheric Deposition Task Force | |
| WAP | Waste Analysis Plan | |
| WAVE | Water Alliances for Environmental Efficiency | |
| WB | Wet Bulb | |
| WCED | World Commission on Environment and Development | |
| WDROP | Distribution Register of Organic Pollutants in Water | |
| WENDB | Water Enforcement National Data Base | |
| WERL | Water Engineering Research Laboratory | |
| WET | Whole Effluent Toxicity test | |
| WHO | World Health Organization | |
| WHP | Wellhead Protection Program | |
| WHPA | Wellhead Protection Area | |
| WHPP | Wellhead Protection Plan | |
| WHPP | Wellhead Protection Program | |
| WHWT | Water and Hazardous Waste Team | |
| WICEM | World Industry Conference on Environmental Management | |
| WL | Water Level | |
| WL | Warning Letter | |
| WL | Working Level (radon measurement) | |
| WLA | Waste Load Allocation | |
| WLA/TMDL | Wasteload Allocation/Total Maximum Daily Load | |
| WLE | Water Level Elevation | |
| WMO | World Meteorological Organization | |
| WP | Work Plan | |
| WP | Wettable Powder | |
| WP | Waste Pile | |
| WPCB | Water Pollution Control Board | |
| WPCF | Water Pollution Control Federation | |
| WQBEL | Water Quality Based Effluent Limits | |
| WQM | Water Quality Management | |
| WQS | Water Quality Standard | |
| WRDA | Water Resources Development Act | |
| WRI | World Resources Institute | |
| WRS | Watershed Restoration Strategy | |
| WSF | Water Soluble Fraction | |
| WSRA | Wild and Scenic Rivers Act | |
| WSTB | Water Sciences and Technology Board | |
| WSTP | Wastewater Sewage Treatment Plant | |
| WT | Water Table | |
| WTP | Water Treatment Plant | |
| WW | Waste Water | |
| WWEMA | Waste and Wastewater Equipment Manufacturers Association | |
| WWF | World Wildlife Fund | |
| WWTP | Wastewater Treatment Plant | |
| WWTU | Wastewater Treatment Unit |
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