Essentials Of Drinking Water Testing

By Judy Sullivan


Drinking water should always be safe for human consumption. A large percentage of the world population drink water that is not safe leading to widespread diseases and death. Minimising the related diseases is one of the most important public health goals in many countries. Drinking water testing is just one of the ways to achieve this goal.

Testing needs to be done often to make sure that what you are drinking is safe. A variety of contaminants may be found in samples based on the environment. Examples include iron, manganese, lead, radon and sulphate. Perhaps the most troublesome problem is the presence of bacterial organisms. Organisms are difficult to visualise and the samples taken may actually appear to be of good quality just by looking. Microorganisms should be tested in stored sources at least once a year.

There are situations that may require testing to be done more frequently within a year. If there are changes in colour, smell, taste and clarity one should suspect high levels of contaminants such as iron, sulphate and manganese. At the same time, whenever unexplained illnesses are noted among people who drink from the same source. Home testing should be done if a member of the household is pregnant.

Specific conditions call for specific tests to be carried out. For example, there should be tests for the presence of coliform bacteria when users develop recurrent gastrointestinal illness. Failure of soaps to lather easily during washing may require a test for hardness. Rapid wear of pipping equipment is a sign that samples need to be tested for PH, alkalinity, corrosion and hardness.

The most vulnerable group of persons with regard to diseases are children less than five years and particularly the infants. Overexposure to nitrates to these group leads to nitrate poisoning. It subsequently results in a condition known as the blue baby syndrome in which the levels of oxygen are too low to meet the metabolic requirements. When identified, this condition should be treated as a medical emergency.

Either a simple flush in the morning or after the tap has run for a while can be used as a sample. Sampling from different points may be needed in case contamination is suspected to be in the plumbing system. This can be before and after water enters a storage container or at the inlet and outlet of a filter. Testing for corrosion in the plumbing system warrants collection of the sample after twelve hours of settling.

Installing filters in the home can help get rid of some troublesome contaminants such as lead. This should be done after the samples have been tested to know exactly what impurities are to be removed. There are particular types of filters: distillation systems and reverse osmosis systems filter out fluoride. In such cases, measures have to be taken to ensure fluoride is obtained by other means to avoid tooth decay. Also, change the filters often to prevent accumulation of contaminants.

Even after the safety threshold has been reached, it is important to ensure that there is proper storage. This will help reduce the chances of contamination and diseases later on. While in storage, drinking water testing should be done regularly to make sure that the status has not changed.




About the Author:



0 comments:

Post a Comment