LIMITED POWER OF ATTORNEY
 FOR SECTION 16 REPORTING OBLIGATIONS

	The undersigned hereby constitutes, and appoints each of Linda Sullivan, Kellye L. Walker, and
Steven Robbins, or any of them acting singly, with full power of substitution, as the undersigned's true
and lawful attorney-in-fact to:

1.	Prepare, execute in the undersigned's name and on the undersigned's behalf, and submit to
the U.S. Securities and Exchange Commission (the "SEC") a Form ID including amendments
thereto, and any other documents necessary or appropriate to obtain codes, passwords, and
passphrases enabling the undersigned to make electronic filings with the SEC of reports
required by Section 16 (a) of the Securities Exchange Act of 1934 and the rules and regulations
promulgated thereunder, each as amended from time to time ("Section 16(a) and Related
Rules");

2.	Prepare, execute for and on behalf of the undersigned, in the undersigned's capacity as an
officer and/or director of American Water Works Company, Inc. (the "Company"), Forms 3, 4,
and 5, including any amendments thereto, relating to the securities of the Company, and file
the same with the SEC and any securities exchange in accordance with Section 16(a) and
Related Rules;

3.	Seek or obtain, on behalf of the undersigned, information on transactions in the Company's
securities from any third party, including brokers, employee benefit plan administrators and
trustees; the undersigned hereby authorizes any such person to release any such information
to the attorney-in-fact and approves and ratifies any such release of information; and

4.	Perform any and all other acts for and on behalf of the undersigned that, in the discretion of
such attorney-in-fact, are necessary or desirable in connection with the foregoing.

   The undersigned hereby grants each such attorney-in-fact full power and authority to do and
perform any and every act and thing whatsoever requisite, necessary or appropriate to be done in
the exercise of any of the rights and powers herein granted, as fully to all intents and purposes as
the undersigned might or could do if present, with full power of substitution, hereby ratifying and
confirming all that such attorney-in-fact, or such attorney-fact's substitute or substitutes, shall
lawfully do or cause to be done by virtue of this Limited Power of Attorney.  The undersigned
acknowledges and the foregoing attorneys-in-fact, in serving in such capacity at the request of the
undersigned, are not assuming, nor is the Company assuming, any of the undersigned's
responsibilities to comply with Section 16 of the Securities Exchange Act of 1934.

   The Limited Power of Attorney shall remain in full force and effect until the undersigned is no
longer required to file Forms 3, 4, and 5 with respect to the undersigned's holdings of and
transactions in the Company's securities, unless earlier revoked by the undersigned in a signed
writing delivered to each such attorney-in fact.  In addition, this Limited Power of Attorney shall
automatically be revoked as to any attorney-in-fact constituted or appointed hereunder upon
termination of such person's employment with the Company.

   IN WITNESS WHEREOF, the undersigned has caused this Limited Power of Attorney to be
executed as of this 31st day of October, 2014.

   	BY:        /s/ Kathy L. Pape
   		(Signature)

		Kathy L. Pape
		(Printed Name)