Water Hardness and pH
Science Fair Projects
Ideas and Sample Projects by Grade Level


Home Quiz Experiments Warning!
Primary School - Grades K-3
P=Project   E=Experiment
Investigate the different effects of chlorine, pH, acid, alkalinity, and water hardness on drinking water sources. [P]
Water K-12 Experiments & Background Information
Interdisciplinary Topic: Water
Interdisciplinary Topic: Ice
Elementary School - Grades 4-6
P=Project   E=Experiment
The effect of water hardness on the germination of marigold seeds [P]
Determine the relative hardness of different common water types. [E]
Testing Water for Hardness Using Soap Bubbles [E]
What is the pH of rain in your area? [E]
Water K-12 Experiments & Background Information
Interdisciplinary Topic: Water
Interdisciplinary Topic: Ice
Middle School - Grades 7-9
P=Project   E=Experiment
Does the Sun Intensity Affect the pH in Water? [E]
Test different Kinds of water for pH, dissolved oxygen, nitrate, phosphates, coli form bacteria, iron and hardness. [P]
A comparison of hard water, softened water and reverse osmosis water [P]
Test different Kinds of water for pH, dissolved oxygen, nitrate, phosphates, coliform bacteria, iron and hardness. [P]
Determine whether Brita Water Filter makes significant improvements in the pH, total hardness, total dissolved solids, free chlorine, total chlorine, and total alkalinity of tap, mineral, spring, sparkling, and distilled water. [E]
Which middle school in your district has the best water quality by testing pH levels, total alkalinity, total hardness, iron levels, copper levels, nitrate levels, and nirtrite levels? [E]
Fighting Hard Water Deposits [E]
Determine if water or vinegar (water with acetic acid) is better for testing lead content in household objects. [E]
The factors which affect the reaction of acid rain on limestone [E]
Does the pH level of water affect the rate of its evaporation? [E]
Test different water resources for acidity / pH [E]
Water K-12 Experiments & Background Information
Interdisciplinary Topic: Water
Interdisciplinary Topic: Ice
High School - Grades 10-12
P=Project   E=Experiment
Determine if hardness in water correlates to nitrogen, phosphorus, and potassium levels in lake soil. [E]
Measure Hardness of Water [E] [E] [E] [E]
Determine whether temperature affects the salinity and pH level of ocean water. [E]
Water K-12 Experiments & Background Information
Interdisciplinary Topic: Water
Interdisciplinary Topic: Ice
Useful Links
R=Resource
Science Fair Projects Resources [R]
Citation Guides, Style Manuals, Reference [R]
Safety Resources [R] [R]
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