Explore how water quality affects ecosystems, human health, and the environment. These projects help students investigate pH, turbidity, dissolved oxygen, contaminants, and filtration using hands‑on testing methods.
pH & Acidity
Compare pH levels of tap water, bottled water, and rainwater
Test how household substances (soap, vinegar) change water pH
Study how pH affects plant growth or aquatic life
Turbidity & Clarity
Measure turbidity using a homemade Secchi disk
Compare clarity of water from different local sources
Test how filtration reduces turbidity
Dissolved Oxygen
Measure dissolved oxygen in cold vs warm water
Study how aquatic plants affect oxygen levels
Investigate oxygen changes in stagnant vs flowing water
Water Hardness
Test mineral content using hardness test strips
Compare hardness of tap water, well water, and bottled water
Study how hardness affects soap lathering
Contaminants & Pollutants
Test for nitrates, phosphates, or chlorine
Investigate how fertilizers affect water quality
Compare contamination levels before and after rainfall
Microbial Testing
Grow bacteria from different water samples on agar plates
Compare microbial growth in filtered vs unfiltered water
Study how sunlight or temperature affects microbial activity
Water Filtration
Build a homemade water filter using sand, gravel, and charcoal
Test filtration effectiveness on turbidity and contaminants
Compare different filter designs for efficiency
Environmental Impacts
Study how pollution affects local ponds or streams
Track water quality changes over time
Investigate how human activity influences water ecosystems
