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Dear Dentist




If you have an existing filtration system please consider the following:

Many people have had various filtration systems installed in their homes. They often believe that because these systems "filter" their water that they also "purify" their water. They believe that "crystal clear" means pure. This is often completely untrue. Many filters are designed for removing sediment, but do nothing to make the water safer to drink, and this is precisely the kind of filter that is installed in most homes by building and well drilling contractors. Find out exactly what your system does, and if you can't, we can help you find out so you'll know for certain.

Filtration systems become less effective with age. You may want to test the effectiveness of a system you have had installed to determine if it is still working properly. A single heavy rain event can produce enough turbidity in the water to inactivate certain types of filters. Channeling can make other filters ineffective.

Some of the more common Factors Affecting Filter Performance are:


The filter media loses its ability to remove contaminants and allows contaminants to move through without being adsorbed. When this happens there may be no detectable difference in the output water (the water you consume) but testing will almost always allow us to detect filter exhaustion.



Certain types of filters, those that are filled with particles (ex. sand, activated carbon etc.) can develop channels as water moves through the filter along the paths of least resistance. These channels then allow water to move through the filter without coming in contact with the purifying medium. Water is essentially untreated. Again, there is often no obvious warning or sign that this process has occurred but testing will reveal this deficiency.



If sufficient sediment is brought in through the water coming into the filtration system it can block all the channels and cover the purifying medium in the filter. This is often detected by slowing or reduction of flow through the filter system, but can escape detection if flow rate is only slightly affected. Again, testing will reveal this deficiency if flow is not significantly slowed, because the filter no longer functions to purify the water properly.



Water conditions such as pressure, pH, temperature, or other factors can change suddenly. It can happen due to processing steps at the water treatment plant, or sudden changes in water pressure due to an inadequate water system, pump failures, or breaks or leaks in a water main, or sudden changes in temperature due to freezing etc. These sudden changes can cause carbon sludge which has collected on certain types of filters (during the process of removing contaminants) to be dumped back into the water passing through the system. That is, the contaminants captured on the filter are released into the water you will be drinking after it passes through the filter. This often produces a temporary discoloration (usually darkening -sometimes with granules visible) of the water coming from the filtration system. If this happens, the filter needs to be changed promptly. If the amount of contaminant released into the water is not very large, you may still be drinking unpurified or worse yet, contaminant-enriched water, without noticing. Guess how this can be detected? Yes, our tests can find this kind of problem.


We can recommend water treatment processes and regimens that can guarantee the water you consume to be completely safe to drink.

Filter Effectiveness (Halogenated Organics)

Filter Effectiveness (Trihalomethanes)


Water Treatment Steps: The Recommended Order

(if this order is not followed, the treatments themselves will likely be ineffective)

1. Have water tested

2. Remove sediment

3. Disinfect

4. Remove H2S and odor-causing substances

5. Remove Iron and Manganese

6. Treat for hardness

7. Neutralize acidity

8. Remove VOC's and SOC's - organic compounds

9. Remove heavy metals, lead, mercury, arsenic, cadmium, etc

10. Kill any bacteria, parasites, viruses etc using UV or Ozonation


contact Dr. Essich to let him know you're interested at Dr_E@AWSA.INFO

How Pure Is PUR? - click  below



Purifying PUR Water - click below



Try it yourself. Purchase Indicator Solution, 1 Liter Nalgene Container, and at least a 1 month family supply of Rejuvenator Compound in Gelatin Capsules for $23.99 plus S&H.

Purchase our RIK (rejuvenator-indicator kit) for $23.99
the indicator solution only for $7.38 plus S&H (~$2.50)

New Filters are Expensive. You will save more far more by rejuvenating than by buying filters, and the indicator compound will tell you exactly when you need to replace the filter.






North Georgia's Only Independent Water Treatment Professionals


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Last modified by Dr. Eberhard Essich 03/22/17