Frequent Questions

What is the applicability of the Ground Water Rule?

The requirements of the Ground Water Rule would apply to: (1) all public water systems served solely by ground water, and (2) Subpart H systems that distribute ground water that is not treated to a 4-log inactivation or removal of viruses before entry into the distribution system. Systems supplied by ground water under the direct influence of surface water would not be regulated under this rule as proposed (65 FR 30194, May 10, 2000).

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