1. Determine the purpose of the test
Determine the type of testing, such as drinking water, surface water, sewage, etc.
Determine the indicators to be tested, such as pH, dissolved oxygen, heavy metals, bacteria, etc.

2. Collect water samples
Choose a suitable collection container, usually a non-contaminating glass or plastic bottle.
When collecting samples in natural water bodies, multiple points should be selected for sampling.
Avoid exposing water samples to sunlight or contamination.

3. Marking and Recording
Mark each water sample, including sampling time, location, sample number and other information.
Record relevant environmental conditions, such as temperature, rainfall, etc.

4. Sample Storage
Store the samples under appropriate conditions (e.g. refrigeration) depending on the test being performed.
Make sure that the samples are sent to the testing agency within the best-before date.

5. Laboratory testing
Send water samples to professional testing laboratories for chemical, physical and biological tests.
Carry out corresponding experiments according to the predetermined test items.

6. Data Analysis
Analyze experimental results and compare data with relevant standards.
Generate a test report including the test results and explanations of each indicator.

7. Results Evaluation
Evaluate whether the water quality meets the standards based on the test results.
If necessary, make suggestions for improvement or take further action.

8. Reporting and Communication
Provide test reports to relevant parties (such as government agencies, businesses or the public).
Communicate and explain as needed.

These steps provide a basic water testing process. If you need more in-depth specific guidance or have questions about a step, feel free to ask us again!