; or (2) is within a county for which a drought emergency has been declared by the applicable Governor at any time during the 3-year period preceding the date of the grant award. (c) Grant amount (1) In general Subject to paragraph (2), a grant awarded under the grant program shall be in an amount that is not less than $250,000. (2) Small public water systems The Administrator may award a grant in an amount that is less than $250,000 if the grant is awarded to, or for the benefit of, a public water system that serves fewer than 10,000 customers. (d) Use of funds An eligible entity receiving a grant under the grant program shall— (1) use grant funds to carry out a water efficiency incentive program for customers of a public water system