UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 6-K

Report of Foreign Private Issuer

Pursuant to Rule 13a-16 or 15d-16

under the Securities Exchange Act of 1934

For the month of May, 2015

Commission File Number: 000-24027

NXT Energy Solutions Inc.

(Translation of registrant's name into English)

1400, 505-3rd Street S.W.

Calgary, Alberta T2P 3E6

Canada

(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

Form 20-F      X    No     X    

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):

Yes _____ No     X   

Indicate by check mark if the registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):

Yes _____ No     X   

Indicate by check mark whether by furnishing the information contained in this Form, the registrant is also thereby furnishing the information to the Commission pursuant to Rule 12g3-2(b) under the Securities Exchange Act of 1934.

Yes _____ No     X   

If “Yes” is marked, indicate below the file number assigned to the registrant in connection with Rule 12g3-2(b):

The Issuer is filing material documents not previously filed.

Exhibit List:

99.1 NXT ENERGY SOLUTIONS EXECUTES US $13.4 MILLION SFD® SURVEY CONTRACT TO COMMENCE IN MAY, 2015

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Date: May 12, 2015

NXT Energy Solutions Inc.

By: /s/ Greg Leavens

Name: Greg Leavens

Title: Vice-President Finance and Chief Financial Officer