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- OSP Off-Spec Water (OSP): A Challenge and Opportunity in Environmental & Water Trea… Sustainable Water Management
- OST Understanding OST: The EPA's Office of Science and Technology in Environmental … Environmental Policy & Regulation
- OSW OSW: A Legacy of Innovation in Water Desalination The term "OSW" holds a signi… Sustainable Water Management
- OTA Aerator OTA Aerators: Breathing Life into Water Treatment OTA stands for Over-The-Air,… Water Purification
- OTC Overcoming Odors: OTC and TON in Environmental & Water Treatment Odors in wate… Water Purification
- OTE OTE: The Future of Efficient Water Treatment? In the realm of environmental an… Water Purification
- OTEC Harnessing the Ocean's Thermal Gradient: OTEC for Environmental & Water Treatme… Sustainable Water Management
- other potentially infectious material (OPIM) Other Potentially Infectious Material (OPIM) in Environmental & Water Treatment… Environmental Health & Safety
- other regulated material (ORM) Understanding Other Regulated Material (ORM) in Environmental & Water Treatment… Environmental Health & Safety
- OUR OUR: A Crucial Measurement in Environmental and Water Treatment Oxygen Uptake … Wastewater Treatment
- outfall Outfalls: Where Wastewater Meets the Environment Outfalls are the critical poi… Wastewater Treatment
- outhouse Out of Sight, Out of Mind: The Evolution of the Outhouse in Environmental & Wat… Waste Management
- outsourcing Outsourcing in Environmental & Water Treatment: Streamlining Operations and Ach… Environmental Health & Safety
- ova Ova: A Critical Consideration in Environmental and Water Treatment The term "o… Water Purification
- overburden Overburden: The Unseen Weight of Mining The term "overburden" in environmental… Resource Management
- overdraft Overdraft: The Silent Threat to Our Groundwater Resources Groundwater, a hidde… Sustainable Water Management
- overflow rate (OFR) Understanding Overflow Rate (OFR) in Environmental & Water Treatment Overflo… Wastewater Treatment
- overflow weir Overflow Weirs: A Crucial Component in Environmental & Water Treatment In th… Sustainable Water Management
- overland flow Overland Flow: A Natural Solution for Wastewater Treatment Overland flow is a … Wastewater Treatment
- ovum Ova: A Biological Tool for Environmental & Water Treatment The term "ova" typi… Water Purification
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- meq/L Understanding Milli… Water Quality Monitoring
- theoretical oxygen demand (ThOD) Theoretical Oxygen … Wastewater Treatment
- volatile suspended solids (VSS) Understanding Volat… Wastewater Treatment
- calcium carbonate equivalent Calcium Carbonate E… Water Quality Monitoring
- return activated sludge (RAS) Return Activated Sl… Wastewater Treatment
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