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Sulfamic Acid used to treat iron build up in veins of a private well - When can water be used?

My private water well was having delivery issues and the well development company recommended using a chemical, NuWell NW-100, (contains sulfamic acid) to clean iron deposits from the underground veins to the well. My water naturally contains a lot of iron which is filtered via a home filtration system.

The acid treatment is done but the water is oddly colored, light yellow, and a bit foamy still. I continue to run water through the system to dilute the chemical but 2,000+ gallons later my PH balance is 4.7 4 gallons of pelletized chemical treatment were added to my 245' well.

Any projections on amount of water it will take to dilute this chemical to a non-detectable or "safe" level? At this time I am not watering for fear this acidic solution will kill plants/grass. Can I safely wash dishes, shower and most importantly when can this water again be consumed?

Patricia Dube
Customer - Hayden, ID, USA
August 7, 2009

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August 13, 2009

Ms.

My well is 200 ft deep with the water producing area at 100ft to 140ft. I have treated this well about 5 times in the last five years with bleach (sodium oxychloride). This has reduced the iron bacteria scale and slime. The pump installer has a connection to use an acid treatment which is mainly hydrochloric acid (muriatic acid) and glucolic acid (used for skin peals).

When using the bleach 6%, I mixed it with 350 gallons of water from town. Then through a 2 inch line I dropped it down the well quickly so that the bleach/water mix went into the well and came within 6 inches of the top. This pushes the water/bleach out through the slots in the well pipe into the pea gravel and into the aquifer. When I decide to do this with HCl and glucolic acid I will do it the same way.

I do not know how long before your granules will take to dissolve out and I do not know the structure of you well. My will is 6 inches diameter with a 1 foot diameter layer of pea gravel around this pipe. The last 60 feet of well is in shale (little circulation). The pump is mounted at 150 ft. with a dynamic level of 100ft. The aquafer has substantial horizontal flow so the 17 gallons of bleach that I put down the well (with 350 gallons of town water) is swept away within 2 days (without pumping the water out). I suspect the problem in getting the sulfamic acid out may be that it is in granules or the horizontal movement of the water is the aquafer is slow.

Regards, Dr. Thomas H. Cook, Hot Springs, South Dakota, USA

Dr. Thomas H. Cook
Galvanizing Consultant - Hot Springs, South Dakota, USA