However, many consumers now believe that too much fluoride is being ingested. This is because many toothpaste and mouthwash products also contain fluoride. Too much fluoride will lead to mottled teeth, as mentioned above.

Mechanical filtering is sufficient to remove cryptosporidium spores from water. There is no need for special media, catalytic reactions, or any of the other techniques used to take other contaminants out of the water supply.

To begin, fecal coliform and E. coli are bacteria whose presence in the water indicates that the water may be contaminated with human or animal wastes. These disease-causing pathogens can cause diarrhea, cramps, nausea, headaches, or other symptoms if they are ingested either through the water itself or through foods that have become contaminated.