Chemical water quality parameters

- May 23, 2020-

Having identified various test formats, the next question is: What do we test for?  UNICEF recommends prioritizing fluoride, arsenic, and nitrate for chemical monitoring.  In areas where the earth is naturally rich in minerals that contain fluorine and arsenic, levels in well water can be high enough that chronic exposure is dangerous to human health.If previous testing has established that arsenic and fluoride are not a concern in a particular water system, these two parameters may be omitted in favor of more locally relevant ones.  Arsenic and fluoride contamination can also be caused by human activity like mining or industrial waste discharge.

outdoor use multi-parameter analyzer

outdoor mutiple in one detection meter 

Depending on local conditions and on the focus of a water quality monitoring project, more chemical tests can be added.  One might test for alkalinity or hardness, chloride, dissolved oxygen,Low-tech dissolved oxygen tests require multiple steps with reagent additions followed by a drop-by-drop titration; some training may be necessary and results may be more variable than those of other test kits. Digital meters also exist. organic carbon levels , agrochemicals , or mining/industrial contaminants . Finally, heavy metals like lead, mercury, copper, chromium, etc. are often of local interest.   

pen type TDS meter

Pen type portable TDS meter 

However, the vast majority of these additional tests are best performed in a laboratory given current technologies.