Water

What is Groundwater - US Geological Society

Porosity and Permeability - North Carolina State University

Nitrates - UNL Extension

Nitrogen & Phosphorous Cycles - Crash Course Video

Nitrogen & Phosphorous Cycle Diagrams - BioNinja

Nutrient Pollution (Nitrogen & Phosphorous) - EPA Video

Eutrophication - NOAA Video

Acids, Bases, and pH - The science Classroom Video

pH - USGS Water School

Dissolved Oxygen - USGS Water School

Total Solids - EPA website

Turbidity - USGS Water School

Biochemical Oxygen Demand - USGS Water School

Fecal Coliform - USGS Water School

Temperature and Temperature Change - USGS Water School