DECLARATION : GRANTING AN OFFICER OF
KBC ASSET MANAGEMENT LTD

AUTHORITY TO SIGN AND FILE THE REQUIRED DISCLOSURES WITH
THE SEC ON BEHALF OF
KBC BANK AND KBC GROUP

IN RELATION TO THE FOLLOWING STOCK:

BASIN WATER INC BWTR US EQUITY

I, the undersigned, signing on behalf of KBC Bank NV, and KBC Group NV (“the entities”), hereby grant Noel O’Halloran an officer of KBC Asset Management Ltd (Title: Executive Director and Chief Investment Officer of KBC Asset Management Ltd), permission to sign on behalf of the aforementioned entities, relating to the filing of Securities Exchange Commission (SEC) forms, disclosing that:

• the KBC Asset Management Ltd and KBC Asset Management NV controlled holding in the aforementioned US listed security

• Plus the holdings controlled by the aforementioned entities

Represents over 5% of the outstanding shares of that specific stock.

This permission relates to the above mentioned security, and the filing of reports in relation to:

• Holding >5% of shares outstanding — SEC SCHEDULE 13G (Rule 13d-102) [Information Statement Pursuant to Rules 13d-l and 13d-2 Under the Securities Exchange Act of 1934]

• Holding > 10% of shares outstanding — All additional SEC required filings, including but not limited to FORM 3 [Initial Statement Of Beneficial Ownership Of Securities Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934], and including the obtaining of CIK codes, for access to the SEC EDGAR system for filing on behalf of the entities.

On behalf of KBC Bank NV
Signed:	/s/ Guido Segers	Signed:	/s/ Herman Agneessens
Name:	Guido Segers	Name:	Herman Agneessens
Title:	Executive Director	Title:	Executive Director
Date:	10/09/2007	Date:	10/09/2007
On behalf of KBC Bank NV
Signed:	/s/ Chris Defrancq	Signed:	/s/ Etienne Verwilghen
Name:	Chris Defrancq	Name:	Etienne Verwilghen
Title:	Executive Director	Title:	Executive Director
Date:	10/09/2007	Date:	10/09/2007

DECLARATION : GRANTING AN OFFICER OF
KBC ASSET MANAGEMENT LTD

AUTHORITY TO SIGN AND FILE THE REQUIRED DISCLOSURES WITH THE
SEC ON BEHALF OF
KBC ASSET MANAGEMENT NV

IN RELATION TO THE FOLLOWING STOCK:

BASIN WATER INC BWTR US EQUITY

1, the undersigned, signing on behalf of KBC Asset Management NV (“the entity”), hereby grant Noel O’Halloran an officer of KBC Asset Management Ltd (Title: Executive Director and Chief Investment Officer of KBC Asset Management Ltd), permission to sign on behalf of the aforementioned entity, relating to the filing of Securities Exchange Commission (SEC) forms, disclosing that:

• the KBC Asset Management Ltd and KBC Asset Management NV controlled holding in the aforementioned US listed security

Represents over 5% of the outstanding shares of that specific stock.

This permission relates to the above mentioned security, and the filing of reports in relation to:

• Holding >5% of shares outstanding — SEC SCHEDULE 13G (Rule 13d-102)[Information Statement Pursuant to Rules 13d-1 and 13d-2 Under the Securities Exchange Act of 1934]

• Holding > 10% of shares outstanding — All additional SEC required filings, including but not limited to FORM 3 [Initial Statement Of Beneficial Ownership Of Securities Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934], and including the obtaining of CIK codes, for access to the SEC EDGAR system for filing on behalf of the entity.

Signed for KBC Asset Management NV
Ignace Van Oortegem	Erwin Schoeters
Executive Director	Executive Director
10 September 2007	10 September 2007