SC 13G

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

SCHEDULE 13G

(Rule 13d-102)

Information Statement Pursuant to Rules 13d-1 and 13d-2

Under the Securities Exchange Act of 1934

Consolidated Water Co. Ltd.

(Name of Issuer)

COMMON STOCK

(Title of Class of Securities)

G23773107

(CUSIP Number)

December 31, 2011

Date of Event Which Requires Filing of the Statement

Check the appropriate box to designate the rule pursuant to which this Schedule is filed:

x Rule 13d-1(b)

¨ Rule 13d-1(c)

¨ Rule 13d-1(d)

* The remainder of this cover page shall be filled out for a reporting person’s initial filing on this form with respect to the subject class of securities, and for any subsequent amendment containing information which would alter disclosures provided in a prior cover page.

The information required on the remainder of this cover page shall not be deemed to be “filed” for the purpose of Section 18 of the Securities Exchange Act of 1934 (“Act”) or otherwise subject to the liabilities of that section of the Act but shall be subject to all other provisions of the Act (however, see the Notes).

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Commonwealth Bank of Australia
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)  ¨        (b)  x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION     Australian Capital Territory, Commonwealth of Australia
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER     0
		6.	SHARED VOTING POWER     1,251,562 shares
		7.	SOLE DISPOSITIVE POWER     0
		8.	SHARED DISPOSITIVE POWER     1,251,562 shares
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,251,562 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES    ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Approximately 8.595% (based on 14,561,082 shares issued and outstanding, per Form 10-Q dated Sept 30th 2011)
12.	TYPE OF REPORTING PERSON     BK/HC

CUSIP NO. 602675100 13G Page 3 of 12

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Colonial Holding Company Limited
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)  ¨        (b)  x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION     New South Wales, Commonwealth of Australia
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER     0
		6.	SHARED VOTING POWER     1,251,562 shares
		7.	SOLE DISPOSITIVE POWER     0
		8.	SHARED DISPOSITIVE POWER     1,251,562 shares
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,251,562 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES    ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Approximately 8.595% (based on 14,561,082 shares issued and outstanding, per Form 10-Q dated Sept 30th 2011)
12.	TYPE OF REPORTING PERSON     HC

CUSIP NO. 602675100 13G Page 4 of 12

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Commonwealth Insurance Holdings Limited
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)  ¨        (b)  x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION     New South Wales, Commonwealth of Australia
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER     0
		6.	SHARED VOTING POWER     1,251,562 shares
		7.	SOLE DISPOSITIVE POWER     0
		8.	SHARED DISPOSITIVE POWER     1,251,562 shares
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,251,562 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES    ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Approximately 8.595% (based on 14,561,082 shares issued and outstanding, per Form 10-Q dated Sept 30th 2011)
12.	TYPE OF REPORTING PERSON     HC

CUSIP NO. 602675100 13G Page 5 of 12

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON Colonial First State Group Limited
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)  ¨        (b)  x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION     Victoria, Commonwealth of Australia
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER     0
		6.	SHARED VOTING POWER     1,251,562 shares
		7.	SOLE DISPOSITIVE POWER     0
		8.	SHARED DISPOSITIVE POWER     1,251,562 shares
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,251,562 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES    ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Approximately 8.595% (based on 14,561,082 shares issued and outstanding, per Form 10-Q dated Sept 30th 2011)
12.	TYPE OF REPORTING PERSON     HC

CUSIP NO. 602675100 13G Page 6 of 12

1.	NAME OF REPORTING PERSON S.S. OR I.R.S. IDENTIFICATION NO. OF ABOVE PERSON First State Investment Management (UK) Limited
2.	CHECK THE APPROPRIATE BOX IF A MEMBER OF A GROUP (a)  ¨        (b)  x
3.	SEC USE ONLY
4.	CITIZENSHIP OR PLACE OF ORGANIZATION     Scotland, United Kingdom
NUMBER OF SHARES BENEFICIALLY OWNED BY EACH REPORTING PERSON WITH		5.	SOLE VOTING POWER     0
		6.	SHARED VOTING POWER     1,251,562 shares
		7.	SOLE DISPOSITIVE POWER     0
		8.	SHARED DISPOSITIVE POWER     1,251,562 shares
9.	AGGREGATE AMOUNT BENEFICIALLY OWNED BY EACH REPORTING PERSON     1,251,562 shares
10.	CHECK BOX IF THE AGGREGATE AMOUNT IN ROW (9) EXCLUDES CERTAIN SHARES    ¨
11.	PERCENT OF CLASS REPRESENTED BY AMOUNT IN ROW (9) Approximately 8.595% (based on 14,561,082 shares issued and outstanding, per Form 10-Q dated Sept 30th 2011)
12.	TYPE OF REPORTING PERSON     IA

CUSIP NO. 602675100 13G Page 7 of 12

Item 1	(a)	Name of Issuer:
		Consolidated Water Co Ltd
Item 1	(b)	Address of Issuer’s Principal Executive Offices:
		Regatta Office Park West Bay Road, Po Box 1114 Grand Cayman, Ky1 1102 Cayman Islands
Item 2	(a)	Name of Person Filing
Item 2	(b)	Address of Principal Business Office
Item 2	(c)	Citizenship
		Commonwealth Bank of Australia Ground Floor, Tower 1 201 Sussex Street Sydney, New South Wales, 2000 Commonwealth of Australia Australian Capital Territory Colonial Holding Company Limited Ground Floor, Tower 1 201 Sussex Street Sydney, New South Wales, 2000. Commonwealth of Australia New South Wales Commonwealth Insurance Holdings Limited Ground Floor, Tower 1 201 Sussex Street Sydney, New South Wales, 2000 Commonwealth of Australia New South Wales Colonial First State Group Limited Ground Floor, Tower 1 201 Sussex Street Sydney, New South Wales, 2000 Commonwealth of Australia Victoria First State Investment Management (UK) Limited 23 St Andrew Square Edinburgh, EH2 1BB Scotland
Item 2	(d)	Title of Class of Securities:
		COMMON STOCK
Item 2	(e)	CUSIP Number:
		G23773107
Item 3	If this statement is filed pursuant to Rules 13d-1(b), or 13d-2(b) or (c), check whether the person filing is a:
	(a)	¨	Broker or dealer registered under Section 15 of the Exchange Act;
	(b)	¨	Bank as defined in Section 3(a)(6) of the Exchange Act;
	(c)	¨	Insurance company as defined in Section 3(a)(19) of the Exchange Act;
	(d)	¨	Investment company registered under Section 8 of the Investment Company Act;
	(e)	¨	An investment adviser in accordance with Rule 13d-1(b)(1)(ii)(E);
	(f)	¨	An employee benefit plan or endowment fund in accordance with Rule 13d-1(b)(1)(ii)(F);
	(g)	x	A parent holding company or control person in accordance with Rule 13d-1(b)(1)(ii)(G);
	(h)	¨	A savings association as defined in Section 3(b) of the Federal Deposit Insurance Act;
	(i)	¨	A church plan that is excluded from the definition of an investment company under Section 3(c)(14) of the Investment Company Act;
	(j)	x	A non-U.S. institution in accordance with §240.13d–1(b)(1)(ii)(J);
	(k)	¨	Group, in accordance with Rule 13d-1(b)(1)(ii)(K).
			If filing as a non-U.S. institution in accordance with §240.13d–1(b)(1)(ii)(J), please specify the type of institution: Investment Advisor.
			If this statement is filed pursuant to Rule 13d-1(c), check this box:    ¨

CUSIP NO. 602675100 13G Page 8 of 12

Item 4	Ownership:
	(a)	Amount beneficially owned:
		Incorporated by reference to Item 9 of the cover page pertaining to each reporting person.
	(b)	Percent of Class:
		Incorporated by reference to Item 11 of the cover page pertaining to each reporting person.
	(c)	Number of shares as to which such person has:
		(i)	sole power to vote or to direct the vote:
			Incorporated by reference to Item 5 of the cover page pertaining to each reporting person.
		(ii)	shared power to vote or to direct the vote:
			Incorporated by reference to Item 6 of the cover page pertaining to each reporting person.
		(iii)	sole power to dispose or to direct the disposition of:
			Incorporated by reference to Item 7 of the cover page pertaining to each reporting person.
		(iv)	shared power to dispose or to direct the disposition of:
			Incorporated by reference to Item 8 of the cover page pertaining to each reporting person.
Item 5	Ownership of Five Percent or Less of a Class:
	Not Applicable.
Item 6	Ownership of More than Five Percent on Behalf of Another Person:
	Not Applicable.
Item 7	Identification and Classification of the Subsidiary which Acquired the Security Being Reported on by the Parent Holding Company:
	See Exhibit 99.2.
Item 8	Identification and Classification of Members of the Group:
	Not Applicable.
Item 9	Notice of Dissolution of Group:
	Not Applicable.
Item 10	Certification:
	By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect. I also certify that, to the best of my knowledge and belief, the foreign regulatory schemes applicable to the relevant subsidiaries referenced in Exhibit 99.2 to this Schedule 13G are substantially comparable to the regulatory scheme applicable to the functionally equivalent U.S. institution(s), and that I undertake to furnish to the Commission staff, upon request, information that would otherwise be disclosed in a Schedule 13D.

CUSIP NO. 602675100 13G Page 9 of 12

After reasonable inquiry and to the best of its knowledge and belief, the undersigned certify that the information set forth in this statement is true, complete and correct.

Dated this      day of February, 2012.

Commonwealth Bank of Australia
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Company Secretary
Colonial Holding Company Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
Commonwealth Insurance Holdings Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
Colonial First State Group Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
First State Investment Management (UK) Limited
By:	/s/ Gregory Robert Cooper
Name:	Gregory Robert Cooper
Title:	Director

CUSIP NO. 602675100 13G Page 10 of 12

INDEX TO EXHIBITS

Exhibit No.	Exhibit
99.1	Joint Filing Agreement
99.2	Item 7 Information

EX-99.1

CUSIP NO. 602675100 13G Page 11 of 12

Exhibit 99.1

Joint Filing Agreement

February     , 2012

In accordance with Rule 13d-1(k)(1) under the Securities Exchange Act of 1934, as amended, Commonwealth Bank of Australia, Colonial Holding Company Limited, Commonwealth Insurance Holdings Limited, Colonial First State Group Limited, and First State Investment Management (UK) Limited each hereby agree to the joint filing of this statement on Schedule 13G (including any and all amendments hereto). In addition, each party to this Agreement expressly authorizes each other party to this Agreement to file on its behalf any and all amendments to such Statement on Schedule 13G. A copy of this Agreement shall be attached as an exhibit to the Statement on Schedule 13G filed on behalf of each of the parties hereto, to which this Agreement relates.

This Agreement may be executed in multiple counterparts, each of which shall constitute an original, one and the same instrument.

Commonwealth Bank of Australia
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Company Secretary
Colonial Holding Company Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
Commonwealth Insurance Holdings Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
Colonial First State Group Limited
By:	/s/ John Damien Hatton
Name:	John Damien Hatton
Title:	Director
First State Investment Management (UK) Limited
By:	/s/ Gregory Robert Cooper
Name:	Gregory Robert Cooper
Title:	Director

EX-99.2

CUSIP NO. 602675100 13G Page 12 of 12

Exhibit 99.2

Item 7 Information

The securities being reported on by the reporting persons herein as parent holding companies are owned, or may be deemed to be beneficially owned as follows:

Company	Type of Company	.
First State Investments International Ltd.	IA (US registered)
First State Investment Management (UK) Limited	IA (UK registered)