23184 Fraser Highway, Langley  BC V2Z 2V1 604-534-1115   www.edspumps.com
Newsletter #53
TrojanUVMax™ IHS12-D4 


The TrojanUVMax IHS12-D4 comes equipped with a UV and filters to provide an easy-to-choose, install and maintain solution for all your drinking water needs.  


This system is cULus listed and is equipped with filters to remove sediment, improve taste and remove odours from the water. Supported by VIQUA's Reference Card to quickly answer common questions and a lamp counter to remind you when to change the lamp.


Over Pumping Wells  



Most people know someone who has had to drill a new well because the old one "went dry." The cause was a complete mystery and the fact that the driller was able to drill another good well only 50' away raised no questions. The person with the dry well was just glad to have water again.

Had they stopped to think about it they might have wondered why a new hole so close found water when the one just over there was now dry. Obviously the aquifer still has water in it and the new well probably filled up just as high as the old one did when it was new, so what happened?

If theirs was a low yield well, chances are it was the way the well was operated that caused it to "run dry."  Conventional pumping systems remove water from the well until the end use is satisfied, whether that end use is your shower or a storage tank that needs filling. In a slow or low yield well, the water column is constantly being drawn down when demand for water exceeds the rate at which it flows into the well. Pumping water out of a well faster than it comes in is called  Over  Pumping. Periods of extended over pumping increase the rate at which water travels through the ground immediately around the well drawing in sediment that adds cloudiness to the water and may eventually clog the cracks that are the arteries in your water delivery system thus severing the well's connection to the aquifer.
In addition, it exposes more of the well casing and screen area to increased oxygen levels. Chemically this will deposit iron and manganese oxides on the surface areas that could eventually close off the screen preventing flow into the well. 
Biologically, this increased oxygen will provide aerobic slime forming bacteria with the fuel they need to grow and thrive. The increased slime, a polysacaride film will eventually grow to the point were it will clog the well screen. Read the following section on bio-fouling for more information.

Contact our service department if you would like to have your well evaluated.     


What is iron bio-fouling?

Dave Mellis


Better described as bio-fouling, the problem popularly known as "iron bacteria" is both complex and widespread. Iron bacteria and other slime producing bacteria produce a polysacaride film that is attached to surfaces with the well. This bio-film has two functions 1) It traps and stores their foods sources and 2) Provides a temporary safe haven if the environment becomes unfavourable. Bio-films, which include living and dead bacteria, their sheaths, stalks, secretions and other leavings, and embedded metal hydroxide particles build up over time to create a problem.

"Iron bacteria" is only one type of bio- fouling among hundreds of bacteria. Manganese and even aluminum bio-fouling is also found in groundwater systems.These bio-films are natural and usually harmless. However iron bio-fouling can be a nuisance as this type  of bacteria uses the iron in your water supply as its food source and deposits the oxidized iron in its bio-film. This slimy red build up will eventually plug the well screen and plumbing in your house An ordinary coliform test will not usually identify the presence  this type of bacteria. Direct observation under a microscope or a BART test (Biological Activity Reaction) are two methods to identify this bacteria.



If iron bacteria is present, the well should be checked periodically and a maintenance routine established to control the iron bacteria growth. Unfortunately only physical scrubbing along with chemical treatment will remove the bio-film build up within the well. 

EDS Pumps has the right equipment and experience to keep your well healthy and performing.

for more information contact our staff for an evaluation of your well.  


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