Thank you for contacting us through our website. You wrote:
“I have an E. Coli count of 70.3 and a Coliform count of 275.5 in raw spring water located on a ranch that I would like to improve. Any suggestions on how to reduce these counts to less than 1?”
To thoroughly treat this water, we can recommend using a Precision-24 chlorine injection metering pump, which provides extra strength oxidation for killing bacteria and oxidizing high levels of iron and manganese (which can be linked with sulfur odors). Following the point of injection, the chlorine would then feed into a 120-gallon contact tank to provide enough contact time for the solution to react with the coliform and e coli bacteria in the water.
Following the large contact tank, the water should pass through a backwashing carbon filter, which will collect all of the particulate organic matter as well as remaining chlorine. Finally, since this is surface spring water, we recommend using a 1-micron absolute filter cartridge to kill off cysts like giardia or cryptosporidium that aren’t eliminated by chlorination alone.
Precision-24 Chlorinator Package with Solution Tank:
Can be either 110 volt or 220 volt plug; can be hardwired to a pressure switch to come on with a well pump. Works with well water flow rates from 1 – 50 Gallons per Minute (GPM)
Output rating: 0.1 – 24 Gallons per Day (GPD). Pressure rating: Will inject into lines with up to 110 PSI.
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Additional features: Degassing Valve is built in which makes this great for chlorination use. System includes Chlorination Pump, 10 Gallon Solution Tank, Injection Check Valve, tubing and installation fittings. 25 & 35 Gallon tanks also available for additional cost.
120 Gallon Contact Tank
The CT-120 tank is a durable easy-to-install retention tank designed to provide optimum contact time during chemical treatment. These lightweight seamless totally non-corrosive retention tanks are ideal for new and replacement installation where durability is at a premium. 100% non-metallic polymer materials. Impervious to chemical attack. Comes with 1-1/4 inch inlet.
24” x 74”
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Excellent Warranty: 5 Years from date of installation.
Vacuum Breaker, ½” mpt.
Vacuum breaker relief valve Watts 1/2" male 200 PSI maximum.
Required for contact and retention tanks to prevent vacuum in system and avoid imploding vessel.
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Carbon Filter 5700-E 1.5 CF
Includes 1.5 cubic feet of carbon filter media; and Digital 5700-E control valve.
All the filter media you need for the system is included. Excellent for use in de-chlorinating water, taking out hydrogen peroxide and removing many tastes and odors.
Much longer life and higher flow rates than carbon filter cartridges.
Excellent Warranty: 5 Years on Control Valve & 10 years on the media tank.
Includes 1.5 cubic feet of carbon filter media; and Digital 5700-E control valve.
All the filter media you need for the system is included. Excellent for use in de-chlorinating water, taking out hydrogen peroxide and removing many tastes and odors.
Much longer life and higher flow rates than carbon filter cartridges.
Excellent Warranty: 5 Years on Control Valve & 10 years on the media tank.
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Big Blue 1 Micron Cyst Removal - 12 GPM Filter System
12 gallon per minute (gpm) maximum recommended flow rate. The filter housing is made from NSF listed pure polypropylene and will hold one high-flow 4.5 x 20 inch filter cartridge. This system comes complete with a wall mounting bracket kit, filter wrench, and one Flow-Max 1 micron absolute cyst removal filter cartridge 4.5" x 20".
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Check out the diagram below;
