[Code of Federal Regulations]
[Title 40, Volume 20]
[Revised as of July 1, 2003]
From the U.S. Government Printing Office via GPO Access
[CITE: 40CFR149.2]

[Page 840-841]
 
                   TITLE 40--PROTECTION OF ENVIRONMENT
 
         CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED)
 
PART 149_SOLE SOURCE AQUIFERS--Table of Contents
 
  Subpart A_Criteria for Identifying Critical Aquifer Protection Areas
 
Sec.  149.2  Definitions.

    (a) Aquifer means a geological formation, group of formations, or 
part of a formation that is capable of yielding a significant amount of 
water to a well or spring.
    (b) Recharge means a process, natural or artificial, by which water 
is added to the saturated zone of an aquifer.
    (c) Recharge Area means an area in which water reaches the zone of 
saturation (ground water) by surface infiltration; in addition, a major 
recharge area is an area where a major part of the recharge to an 
aquifer occurs.

[[Page 841]]

    (d) Sole or Principal Source Aquifer (SSA) means an aquifer which is 
designated as an SSA under section 1424(e) of the SDWA.

[54 FR 6843, Feb. 14, 1989]