Section 906 Certifications - --------------------------- I, Charles E. Porter, a principal executive officer of the Funds listed on Attachment A, certify that, to my knowledge: 1. The form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2004 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2004 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A. /s/Charles E. Porter Date: May 26, 2004 - ---------------------- ------------------ Charles E. Porter, Principal Executive Officer Section 906 Certifications - --------------------------- I, Steven D. Krichmar, the principal financial officer of the Funds listed on Attachment A, certify that, to my knowledge: 1. The form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2004 fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and 2. The information contained in the Form N-CSR of the Funds listed on Attachment A for the period ended March 31, 2004 fairly presents, in all material respects, the financial condition and results of operations of the Funds listed on Attachment A. /s/Steven D. Krichmar Date: May 26, 2004 - ---------------------- ------------------ Steven D. Krichmar, Principal Financial Officer Attachment A - ------------ Period(s) ended March 31, 2004 010 Putnam Money Market Fund 011 Putnam Tax Exempt Income Fund 027 Putnam California Tax Exempt Income Fund 032 Putnam U.S. Government Income Trust 033 Putnam American Government Income Fund 051 Putnam Municipal Income Fund 054 Putnam High Yield Municipal Trust 062 Putnam Tax Exempt Money Market Fund 064 Putnam California Tax Exempt Money Market Fund 074 Putnam Master Intermediate Income Trust 075 Putnam Diversified Income Trust 539 Putnam International New Opportunities Fund 250/259/264 Putnam Asset Allocation Funds