Is there any danger of bacteria in the water? - We tested on normal strip test and it didn’t show all bacteria was gone? Still showing small amount? Why is this?This can be tested yes. But It is extremely important to do the test via professional health lab and not with any kind of strips like u used.
From what we can see it is possible that the sample was partially contaminated during transport to the lab. Based on the reads, the water would still be safe to consume.
The important thing to note with these results is the difference between Coliform bacteria and E. Coli. What you'll notice with the results is that while there is some Coliform Bacteria there is no E. Coli detected. The importance of this is that Coliform Bacteria is a very large category of bacteria, of which only a very small portion is actually pathogenic, specifically, E. coli.