Exhibit 32.1

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350

AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Quarterly Report of Cap Rock Energy Corporation (the “Company”) on Form 10-Q for the period ended June 30, 2005, as filed with the Securities and Exchange Commission on the date hereof (the “Report”), I, David W. Pruitt, Co-Chairman and Chief Executive Officer of the Company, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 U.S.C. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Dated: October 3, 2005

		By:	/s/ David W. Pruitt
		David W. Pruitt
		Co-Chairman of the Board and Chief Executive Officer
		(Principal Executive Officer)

CAP ROCK ENERGY CORP 10-Q