High school project idea · Science & Engineering

Build a Water Filter and Prove What It Can Do

Engineer a filter, measure specific changes, and resist the temptation to call the water safe to drink.

Design a classroom-safe filtration prototype and evaluate only the properties that can be responsibly measured with available methods.

Original Compass project by Davisville LabsReviewed August 2026Goal real work, evidence, and reflectionEditorial standards →

Why this project matters

Learn by doing something real.

Design a classroom-safe filtration prototype and evaluate only the properties that can be responsibly measured with available methods. This project feels different from a school assignment because the student serves students learning environmental and chemical engineering principles, creates something visible, tests it honestly, responds to feedback, and explains the decisions behind the final result.

What you will create

Your project plan

Use these deliverables as milestones for Build a Water Filter and Prove What It Can Do. Adapt the details to your interests, available time, and real-world opportunities.

  1. 01

    Research question and technical brief

    Research filter media, particle size, flow rate, turbidity, color, odor observation, repeatability, contamination risk, disposal, and limits of safety claims. Document the needs, constraints, credible sources, and perspectives of students learning environmental and chemical engineering principles.

  2. 02

    Experimental or engineering design

    Turn the evidence into a focused plan for the water filtration prototype and performance study, including success criteria, ethical boundaries, scope, and a realistic path to completion.

  3. 03

    Working experiment or prototype

    Create the first complete version of the water filtration prototype and performance study. Include a design brief, filter-media rationale, prototype, controlled test plan, before-and-after measurements, iteration log, performance analysis, and safety warning.

  4. 04

    Test data and failure log

    run repeated tests with nonpotable model water, compare designs or media, and explicitly demonstrate which hazards were not tested Record what happened, what failed, what users or reviewers said, and which changes you made.

  5. 05

    Final science or engineering case study

    Publish the final water filtration prototype and performance study with a portfolio-ready case study showing the challenge, evidence, process, revisions, results, limits, and next version.

Make the work stronger

What separates a finished project from a meaningful one?

For Build a Water Filter and Prove What It Can Do, use these checkpoints to protect the quality of the work without turning the project into a performance for admissions.

Avoid this

  • Starting the water filtration prototype and performance study before understanding students learning environmental and chemical engineering principles
  • Treating assumptions or internet opinions as real evidence
  • Choosing a scope too large to test and finish with care

Evidence that it is working

  • The audience and real problem are clearly defined
  • Research and evidence are documented
  • A working water filtration prototype and performance study was created

If you want to go further

  • Test the work with at least five additional people from students learning environmental and chemical engineering principles
  • Interview a professional connected to Environmental Engineering and compare their advice with your approach

Skills you can build

Capabilities that travel beyond this project.

Environmental EngineeringExperimental ControlsSafety CommunicationExperimental DesignTechnical Communication

College application value

Use the project as evidence, not decoration.

Can demonstrate initiative, curiosity, reflection, and growth through the student’s choices, response to setbacks, work with students learning environmental and chemical engineering principles, and development of Environmental Engineering, Experimental Controls, and Safety Communication.

CuriosityProblem SolvingIterationResearchTechnical Communication

The goal of Build a Water Filter and Prove What It Can Do is not to manufacture an impressive activity. Do real work, keep evidence of the process, and reflect honestly on what changed.

Related college majors

Which fields connect to this work?

Use Build a Water Filter and Prove What It Can Do as a clue, then open a related major guide to compare coursework, career directions, reality checks, and other ways to test the field.

How this guide was made

Build a Water Filter and Prove What It Can Do is an original Compass educational starting point designed around real work, visible evidence, feedback, and reflection. It is not an admissions guarantee.

Read editorial standards →
Ready to build it?

Turn this idea into a step-by-step Compass project.

Try this project in Compass