Test results

The drinking water at the schools was tested by a lab employed by the Thai Ministry of health, one year after they were provided with our system.The water at the schools was declared 99,99% free of pathogenic bacteria, which means that it is 100% safe to drink this water. During this year the filters worked non stop, without any interim changing of the filter patterns. The documents shown on the bottom of this page show the water tests on three of the schools. These tests are microbiologic tests that show which bacteria can be found in the water.

The water samples that are taken are filtered rainwater (filtered water) as well as unfiltered groundwater (source water). Unfiltered source water is sampled to show that drinking source water is also very unsafe. The tests show that source water is also often contaminated with bacteria.

Later on we shall also show the chemical analysis of the source water. Source water is often used as drinking water when rainwater is scarce. It is already known that source water contains a dangerous percentage of fluoride, arsenic, and other heavy metals.

However it often occurs that rainwater tanks are filled with ditch water during dry seasons. In this agricultural region, people work a lot with pesticides and fertilizer. During heavy rainfall a lot of these substances wash into the canals, rivers and ponds. A lot of these substances end up in the source water.

HOAT makes sure there are enough tanks that are in good condition, so people can still have enough rainwater during dry seasons.

By lack of rainwater the children in these regions sometimes drink pumped up source water. Test number 4 done at one of the schools shows that the source water often contains pathogenic bacteria. This test is a microbiologic test and only shows the presence of bacteria. Later on we will demonstrate which chemical dangers this water contains. However, to do so we need to use a different test.

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