POWER OF ATTORNEY

 I, Maria C. Green, hereby authorize and designate each of Kristin A.
 Stokes, Heidi Wilson and Amy Seidel, signing singly, as my true and lawful
 attorney-in-fact to:

 (1)	execute for and on my behalf, in my capacity as an officer
 and/or director of Tennant Company (the "Company"), Forms 3, 4 and 5 in
 accordance with Section 16(a) of the Securities Exchange Act of 1934 (the
 "Exchange Act") and the rules and regulations promulgated thereunder;

(2)	do and perform any and all acts for and on my behalf which
may be necessary or desirable to complete and execute any such Form 3, 4 or 5
 and timely file such form with the Securities and Exchange Commission, any
 stock exchange or similar authority, and the National Association of
Securities Dealers; and

(3)	take any other action of any type whatsoever in connection
 with the foregoing which, in the opinion of such attorney-in-fact, may be to
 my benefit, in my best interest, or legally required of me, it being
 understood that the statements executed by such attorney-in-fact on my behalf
 pursuant to this Power of Attorney shall be in such form and shall contain
 such terms and conditions as such attorney-in-fact may approve in such
 attorney-in-fact's discretion.

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

This Power of Attorney shall remain in full force and effect until I am
 no longer required to file Forms 3, 4 and 5 with respect to my holdings of and
 transactions in securities issued by the Company, unless earlier revoked by me
 in a signed writing delivered to the foregoing attorneys-in-fact.

IN WITNESS WHEREOF, I have caused this Power of Attorney to be duly
 executed as of this 25th day of March, 2019.


/s/ Maria C. Green