Hello @Hichul Chung2
What is your objective?
- Identify an appropriate drinking water source?
- Assess the effectiveness of a household water treatment technology?
- Monitor compliance with standard and regulations?
- Increase user awareness on water quality issues?
- Check if a borehole has been properly disinfected?
Based on your objective, there are different options to consider: Presence-Absence - (H2S, other culture media), Most Probable Number, Membrane filtration.
Let me know your objectives, and we can recommend the appropriate options.