<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE CALIFORNIA MUNICIPAL INCOME TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE FLORIDA MUNICIPAL INCOME TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE MASSACHUSETTS MUNICIPAL INCOME TRUST
(the "Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE MICHIGAN MUNICIPAL TRUST (the "Fund"),
that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE NEW JERSEY MUNICIPAL INCOME TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE NEW YORK MUNICIPAL INCOME TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE OHIO MUNICIPAL INCOME TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
Thomas J. Fetter
President
<Page>
Exhibit 99.906CERT
FORM N-CSR ITEM 11(b) EXHIBIT
CERTIFICATION PURSUANT TO
18 U.S.C. SECTION 1350,
AS ADOPTED PURSUANT TO
SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002
The undersigned hereby certify in their capacity as Treasurer and
President, respectively, of EATON VANCE PENNSYLVANIA MUNICIPAL TRUST (the
"Fund"), that:
(a) the Annual Report of the Fund on Form N-CSR for the period ended
November 30, 2004 (the "Report") fully complies with the requirements of
Section 13(a) or 15(d) of the Securities Exchange Act of 1934, as
amended; and
(b) the information contained in the Report fairly presents, in all material
respects, the financial condition and the results of operations of the
Fund for such period.
A SIGNED ORIGINAL OF THIS WRITTEN STATEMENT REQUIRED BY SECTION 906 HAS BEEN
PROVIDED TO THE FUND AND WILL BE RETAINED BY THE FUND AND FURNISHED TO THE
SECURITIES AND EXCHANGE COMMISSION OR ITS STAFF UPON REQUEST.
Date: January 18, 2005
----------------
/s/ James L. O'Connor
- ---------------------
James L. O'Connor
Treasurer
Date: January 18, 2005
----------------
/s/ Thomas J. Fetter
- --------------------
Thomas J. Fetter
President