Turn water pollution and water quality into a reading detective investigation your students won't want to put down. This printable Water Pollution & Water Quality CSI Reading Mystery is designed for Grades 3–6 classroom teachers, homeschool parents, and tutors who want meaningful nonfiction reading comprehension wrapped in a real-world science story students actually care about solving. It is the perfect Earth Day or World Water Day activity and fits right into any environmental science, ecosystems, or human impact unit.
Students read a 2-page nonfiction passage about water pollution and water quality, answer text-evidence questions, use their answers to eliminate suspects, and race to crack the case — all while building real reading comprehension. No apps, no prep, no fuss.
Quick Details
Grade Levels: Grades 3–6 (best for Grades 3–5)
Format: Printable PDF
Resource Type: CSI Reading Mystery worksheets
Reading Skills: Nonfiction comprehension, text evidence, main idea, cause and effect, and inference
Pages: 36 pages including answer keys (color and black-and-white versions)
Best For: Earth Day, reading centers, sub plans, early finishers, review, small groups, and homeschool
Tech Needed: None — no apps, locks, passwords, or student logins required
Case Summary
Something has gone wrong at Maple Creek. The water has turned murky, a strange foam clings to the banks, and fish have been found floating near the old footbridge. Sixteen people and businesses near the water could be responsible for polluting the creek — and any one of them could be the culprit.
As CSI Reading Investigators, students read the article about water pollution and water quality and answer comprehension questions to gather evidence and rule each suspect out.
With every correct answer, the suspect list shrinks until only the culprit remains.
Can your investigators read the clues and discover who is polluting Maple Creek? Sharpen those pencils and solve the case.
Skills Covered
Students will practice:
- Reading and understanding nonfiction informational text
- Finding and using text evidence
- Identifying main idea and supporting details
- Cause and effect and inference
- Science and environmental vocabulary in context
- Logic, reasoning, and critical thinking
What's Included
- CSI-style water pollution and water quality reading mystery activity
- 2-page nonfiction reading passage (water quality, pollution sources, runoff, microplastics, algal blooms, treatment, and wetlands)
- 15 multiple-choice comprehension questions
- Open-ended comprehension questions
- A case file scenario (the polluting of Maple Creek) and 16-suspect elimination lineup
- Vocabulary word search for early finishers
- Extension activities (writing, art, research, and STEM)
- Answer keys for all activities
- Color and black-and-white versions
- Print-and-go PDF format
Best Used For
This printable CSI Reading Mystery works well for:
- Earth Day (April 22) and World Water Day (March 22)
- Environmental science, ecosystems, and human impact units
- Nonfiction reading comprehension practice
- Reading centers and early finishers
- Substitute teacher plans
- Small groups, RTI, and intervention
- Homeschool reading and science
