What type of container is typically used for collecting water samples for testing?

The use of glass or sterile plastic bottles is the standard for collecting water samples for testing due to their inert properties and ability to minimize contamination. Glass bottles do not leach chemicals into the sample, ensuring the integrity of the water being tested. Sterile plastic bottles, on the other hand, are often treated to prevent microbial contamination, which is essential when the analysis involves biological testing.

Metal containers are generally avoided because certain metals can react with the water, potentially altering the sample’s chemistry and compromising the test results. Cardboard boxes are not suitable for direct water collection as they can absorb moisture and introduce contaminants, making them impractical for this purpose. Unsterilized reusable bottles pose a significant risk of contamination from previous contents, which could lead to inaccurate test results. Therefore, the use of glass or sterile plastic bottles is essential to ensure reliable and valid water quality testing.