NAC445A.66895. Water wells: Prevention of pollution and contamination.

     1. Drilling fluids and additives must not impart any substances into the water which will cause or promote any pollution or contamination.

     2. If inferior quality water is encountered at any time during the construction of a water well, the aquifers containing that water must be adequately cased or sealed off in such a manner that the water cannot enter the well or move either up or down the annular space outside the casing of the well. If necessary to prevent the movement of that water, appropriate packers or seals must be installed.

     3. If a gravel-packed well encounters inferior quality water, the aquifers containing that water must be sealed off by pressure grouting, or with appropriate packers or seals, in such a manner as to prevent that water from moving vertically in the gravel-packed portions of the well.

     4. As used in this section, “inferior quality water” means any mineralized water or water known to be polluted or contaminated.

     (Added to NAC by Bd. of Health, eff. 2-20-97)