Well Water Production, Water Sampling, Chlorination, Septic Inspection


When coliform bacteria is present usually the next step is to chlorinate the well and house.  Chlorination fixes the problem about 75% of the time, but there is no guarantee. Larry needs a full week to do a chlorination, if everything goes well. $350.00 which includes a potability re-sample. 

Day 1 � Put granular chlorine directly into well at well-head & distribute chlorinated water thru out house including washing machine, dishwasher, ice-maker, etc.  Chlorinated water must set in plumbing for minimum of 24 hours to kill the coliform bacteria.  Do not use water except to flush toilet.


Day 2 � Pump out chlorinated water.  A test reagent is used to make sure there is no chlorine left in the water.  Water can be used for everything except drinking.


Day 6 � Pick up water re-sample & deliver it to a Colorado State Certified Micro Bacteriological Laboratory for a presence/absence (fail/pass) test of total coliform bacteria and fecal coliform bacteria.


Day 7 � Potability results from lab sent to you via email or fax.


If there is any chlorine in potability re-sample, then it will automatically pass.  When it's pumped out on day 2 Larry tries to get all the chlorine out & uses a field test kit to moniter it.  Over the next 3-5 days the best situation is that some water is run to continue refreshing the well.  This helps guarantee that he's not sampling under the influence of chlorine.  He wants to know if the bacteria was killed or not.  He wants to clean up the well, but he also wants to determine if the well can be cleaned up.  Part of the reason of going through this procedure is to see if the source of well's water is contaminated by a seasonal event or is permanently affected & needs permanent disinfection technology equipment.

Disinfection Technology

If chlorination does not work then water treatment equipment using disinfection technology needs to be installed.  Houses usually use an Ultra Violet Light System (UV).

UV has treated water since the beginning of time through natural sunlight.  Modern ultraviolet treatment units use a UV bulb in a clear quartz or plexiglas housing, around which flows the untreated water. The UV light destroys the genetic material of pathogens like coliform bacteria and legionella, which effectively neutralizes them by preventing them from reproducing.

UV is not effective for the treatment of hard-shelled cysts like Cryptosporidium and Giardia lamblia.  Because of the possible presence of protozoan cysts, a 5-m filter must be added to the system. Ultraviolet radiation, in order to be effective, must pass through the water in order to control the bacteria. The water therefore cannot have any turbidity or suspended particles. Ultraviolet radiation adds nothing to the water and does not produce any taste or odor. Ultraviolet radiation disinfection also requires a safety system, where a photoelectric cell activates an alarm system and/or stops the water pump if the ultraviolet radiation intensity is not sufficient for safe disinfection. The major problems. with such a system are cost, fouling of the chamber, collection of sediment, and growth of algae. In the latest ultraviolet radiation systems, Teflon tubes are used instead of quartz tubes and seem to decrease these problems.

 Averages around $800 - $1500 depending on the size of the house, water

     flow (gallons per minute) and no pre-treatment required.


� Averages around $3000 with pretreatment when minerals or cloudiness
    impede the light penetration through the water and UV light cannot see
    through it to kill the bacteria.

Blue Valley Water Specialists, Inc.

does not install water treatment systems.