UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C.  20549

FORM 10-Q

(Mark One)

x      QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended September 30, 2010

OR

o         TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from                   to                   

Commission File No. 1-9328

ECOLAB INC.

(Exact name of registrant as specified in its charter)

370 Wabasha Street N., St. Paul, Minnesota  55102

(Address of principal executive offices) (Zip Code)

1-800-232-6522

(Registrant’s telephone number, including area code)

(Not Applicable)

(Former name, former address and former fiscal year,

if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.   Yes x  No o

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulations S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).  Yes x  No o

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company.  See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).  Yes o  No x

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of October 31, 2010.

232,134,993 shares of common stock, par value $1.00 per share.

PART I - FINANCIAL INFORMATION

Item 1. Financial Statements

ECOLAB INC.

CONSOLIDATED STATEMENT OF INCOME

The accompanying notes are an integral part of the consolidated financial information.

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ECOLAB INC.

CONSOLIDATED STATEMENT OF INCOME

The accompanying notes are an integral part of the consolidated financial information.

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ECOLAB INC.

CONSOLIDATED BALANCE SHEET

The accompanying notes are an integral part of the consolidated financial information.

(Continued)

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ECOLAB INC.

CONSOLIDATED BALANCE SHEET (continued)

(a)          Common stock, 400 million shares authorized, $1.00 par value per share, 231.9 million shares outstanding at September 30, 2010, 236.6 million shares outstanding at December 31, 2009.

The accompanying notes are an integral part of the consolidated financial information.

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ECOLAB INC.

CONSOLIDATED STATEMENT OF CASH FLOWS

The accompanying notes are an integral part of the consolidated financial information.

(Continued)

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ECOLAB INC.

CONSOLIDATED STATEMENT OF CASH FLOWS (Continued)

The accompanying notes are an integral part of the consolidated financial information.

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS

1.       Consolidated Financial Information

The unaudited consolidated financial information for the third quarter and nine months ended September 30, 2010 and 2009, reflect, in the opinion of management, all adjustments necessary for a fair presentation of the financial position, results of operations and cash flows of Ecolab Inc. (“the company”) for the interim periods presented. The financial results for any interim period are not necessarily indicative of results for the full year. The consolidated balance sheet data as of December 31, 2009 was derived from the audited consolidated financial statements, but does not include all disclosures required by accounting principles generally accepted in the United States of America.  The unaudited consolidated financial information should be read in conjunction with the consolidated financial statements and notes thereto incorporated in the company’s Annual Report on Form 10-K for the year ended December 31, 2009.

With respect to the unaudited financial information of the company for the third quarter and nine months ended September 30, 2010 and 2009, included in this Form 10-Q, PricewaterhouseCoopers LLP reported that they have applied limited procedures in accordance with professional standards for a review of such information. Therefore, their separate report dated November 4, 2010 appearing herein, states that they did not audit and they do not express an opinion on that unaudited financial information. Accordingly, the degree of reliance on their report on such information should be restricted in light of the limited nature of the review procedures applied. PricewaterhouseCoopers LLP is not subject to the liability provisions of Section 11 of the Securities Act of 1933, as amended (the “Act”), for their report on the unaudited financial information because that report is not a report or a part of a registration statement prepared or certified by PricewaterhouseCoopers LLP within the meaning of Sections 7 and 11 of the Act.

2.       Special Gains and Charges

Special gains and charges reported on the Consolidated Statement of Income include the following:

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.       Special Gains and Charges (Continued)

In the third quarter of 2010, the company sold an investment in a small U.S. business and recognized a gain on the sale. The investment was not material to the company’s consolidated results of operations or financial position.

Beginning in 2010, Venezuela has been designated hyper-inflationary and as such all foreign currency fluctuations are now recorded in income. On January 8, 2010 the Venezuelan government devalued its currency, the Bolivar Fuerte. As a result of the devaluation, the company recorded a charge in the first quarter of 2010 as shown in the table above due to the remeasurement of the local balance sheet using the “official” rate of exchange for the Bolivar Fuerte.

As previously disclosed, in 2009, the company completed restructuring and other cost-saving actions in order to streamline operations and improve efficiency and effectiveness. The restructuring plan was finalized and all actions, except for certain cash payments, were completed as of December 31, 2009.

Changes to the restructuring liability accounts during 2010 and 2009 include the following:

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

2.       Special Gains and Charges (Continued)

Restructuring charges have been included as a component of both cost of sales and special gains and charges on the Consolidated Statement of Income. Amounts included as a component of cost of sales include asset write-downs and manufacturing related severance. Restructuring liabilities have been classified as a component of other current liabilities on the Consolidated Balance Sheet.

Employee termination costs include personnel reductions and related costs for severance, benefits and outplacement services. Asset disposals include inventory and intangible asset write-downs related to the discontinuance of product lines which are not consistent with the company’s long-term strategies. Other charges include one-time curtailment and settlement charges related to the company’s International pension plans and U.S. postretirement health care benefits plan, and lease terminations.

For segment reporting purposes, special gains and charges are included in the Corporate segment, which is consistent with the company’s internal management reporting.

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3.     Selected Balance Sheet Information

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

3.       Selected Balance Sheet Information (Continued)

4.       Interest

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5.       Financial Instruments and Hedging Transactions

Fair Value of Financial Instruments

The company’s financial instruments include cash and cash equivalents, accounts receivable, accounts payable, commercial paper, notes payable, foreign currency forward contracts and long-term debt. The carrying values of cash and cash equivalents, accounts receivable, accounts payable, commercial paper and notes payable approximate fair value because of their short maturities. The carrying values of foreign currency forward contracts is at fair value, which is determined based on foreign currency exchange rates as of the balance sheet date (level 2 - significant other observable inputs).

The carrying amount and the estimated fair value of long-term debt, including current maturities, held by the company were:

The fair value of long-term debt is based on quoted market prices for the same or similar debt instruments. The company has concluded that it does not have any financial instruments measured using the company’s own assumptions of fair market value (level 3 - unobservable inputs).

Derivative Instruments and Hedging

The company uses foreign currency forward contracts, interest rate swaps and foreign currency debt to manage risks associated with foreign currency exchange rates, interest rates and net investments in foreign operations. The company records all derivatives as assets and liabilities on the balance sheet at fair value. Changes in fair value are recognized immediately in earnings unless the derivative qualifies and is designated as a hedge. The effective portion of changes in fair value of hedges are initially recognized in accumulated other comprehensive income (“AOCI”) on the Consolidated Balance Sheet. Amounts recorded in AOCI are reclassified into earnings in the same period or periods during which the hedged transactions affect earnings. The company evaluates hedge effectiveness at inception and on an ongoing basis. If a derivative is no longer expected to be effective, hedge accounting is discontinued. Hedge ineffectiveness, if any, is recorded in earnings.

The company does not hold derivative financial instruments of a speculative nature. The company is exposed to credit loss in the event of nonperformance of counterparties for foreign currency forward exchange contracts and interest rate swap agreements. The company monitors its exposure to credit risk by using credit approvals and credit limits and by selecting major international banks and financial institutions as counterparties. The company does not anticipate nonperformance by any of these counterparties.

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ECOLAB INC.

CONDENSED NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (Continued)

5.       Financial Instruments and Hedging Transactions (Continued)

Derivatives Designated as Cash Flow Hedges

The company utilizes foreign currency forward contracts to hedge the effect of foreign currency exchange rate fluctuations on forecasted foreign currency transactions, including: sales, inventory purchases, and intercompany royalty and management fee payments. These forward contracts are designated as cash flow hedges. The effective portions of the changes in fair value of these contracts are recorded in AOCI until the hedged items affect earnings, at which time the gain or loss is reclassified into the same line item in the Consolidated Statement of Income as the underlying exposure being hedged. All hedged transactions are forecasted to occur within the next twelve months.

The company occasionally enters into interest rate swap contracts to manage interest rate exposures. In 2006 the company entered into and subsequently closed two forward starting swap contracts related to the issuance of its senior euro notes. The settlement payment was recorded in AOCI and is recognized in earnings as part of interest expense over the remaining life of the notes as the forecasted interest transactions occur.

Derivatives Not Designated as Hedging Instruments

The company also uses foreign currency forward contracts to offset its exposure to the change in value of certain foreign currency denominated assets and liabilities, primarily receivables and payables.  Although the contracts are effective economic hedges, they are not designated as accounting hedges. Therefore, changes in the value of these derivatives are recognized immediately in earnings, thereby offsetting the current earnings effect of the related foreign currency denominated assets and liabilities.

The following table summarizes the fair value of the company’s outstanding derivatives. The amounts are included in other current assets and other current liabilities on the balance sheet.