What are water pollutants?

Explanation

**Step-by-Step Solution:**

1. **Definition of Water Pollutants:**
Water pollutants are defined as substances that enter water bodies and cause pollution. These substances can alter the quality of water, making it unsafe for consumption and harmful to aquatic life.

2. **Examples of Water Pollutants:**
- **Bacteria and Viruses:** These microorganisms can proliferate in contaminated water, especially when organic waste is present. Their presence indicates water pollution and poses health risks to humans and animals.
- **Sewage or Wastewater:** This is water that has been contaminated by human or animal waste. It significantly degrades water quality and can lead to serious health hazards if not treated properly.
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