Disposal of Water Treatment Backwash at Single Family or Duplex Residences What is Water Treatment Backwash Water? Approximately 40 percent of New Hampshire residences are served by private wells. Minerals, hardness (calcium) and other naturally occurring conditions can impair the quality of the water supplied by those wells, presenting both aesthetic and health concerns. To address those concerns, various methods of treatment are used. Most residential water treatment systems focus on the aesthetic aspects of drinking water, such as water softening, pH adjustment, removal iron and manganese. Treatment for arsenic is also common in some areas of New Hampshire. Examples of treatment methods in use are reverse osmosis, ozonation, aeration and ion exchange. In the process of water treatment, filters and treatment media require regular “backwashing” to clear out solids and regenerate media. The backwash water may contain silt, sand, brine, iron, manganese, arsenic and incidental sludges. This fact sheet focuses specifically on singlefamily and duplex home drinking water treatment systems and the disposal of associated backwash water from the filters and other treatment devices. For the complete fact sheet go to des.nh.gov Subsurface bureau
Posted on: Wed, 05 Jun 2013 11:52:51 +0000
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