Exhibit 99.1

News Release
Date: August 2, 2011       Nalco Reports Strong Second-Quarter 2011 Financial Results						Nalco Company 1601 West Diehl Road Naperville, IL 60563-1198 www.nalco.com   Media Contact: Charlie Pajor 630 305 1556 cpajor@nalco.com   Investor Contact: Lisa Curran 630 305 1475 llcurran@nalco.com

(Naperville, Ill.) Nalco (NYSE: NLC), providing essential expertise for water, energy and air, reported results for the second quarter ending June 30, 2011.

Second-Quarter Highlights

NALCO COMPANY

“Our strong performance with high revenue growth and accelerated price escalation, delivered solid earnings growth and positions us well for the second half of 2011 and into 2012,” said Nalco Chairman and Chief Executive Officer Erik Fyrwald. “I’m very proud of how our sales professionals, supported by the rest of our team, are working to deliver and share value with our customers in an environment of record raw material costs.”

“Our planned merger with Ecolab will create even more value as our companies come together – combining Ecolab’s leading capabilities in cleaning and sanitization with our leading positions in water, process and energy services. In addition to $150 million in previously stated cost synergies, we see significant revenue synergy opportunities including taking advantage of Ecolab’s very strong positions in Food & Beverage and Institutional markets where Nalco has strong offerings and attractive margins but a smaller position. Together we can accelerate growth of our water services business in these markets. We also see opportunities to further improve profitability and earnings consistency through corporate account management, business execution, strategic sourcing and other approaches that Ecolab has effectively demonstrated through the years.”

Segment and Region Details (See Attachments 5 and 6)

Paper Services: Sales grew 11 percent organically to $211 million, led by double-digit growth in the Americas. Direct contribution improved 11 percent over the prior year driven by volume growth and pricing gains. Direct contribution margin declined 80 basis points from the prior year, reflecting raw material and freight headwinds not yet fully offset by pricing gains.

Water Services: Sales of $489 million increased 11 percent organically, led by double-digit growth in Food & Beverage and Mining sales. Heavy industry organic sales grew

NALCO COMPANY

12 percent while light industry grew 3 percent. Direct contribution improved 7 percent over the prior year driven by volume growth and pricing gains. Direct contribution margin declined 110 basis points versus the prior year, reflecting raw material headwinds and the impact from substantial BRIC+ hires last year.

Energy Services: Sales of $476 million increased 11 percent organically, excluding Gulf sales, led by substantial growth in Adomite and Enhanced Oil Recovery and double-digit Downstream sales growth. Direct contribution, excluding Gulf response sales, increased 16 percent over the prior year, reflecting volume growth and pricing gains, partially offset by increased raw material and freight costs. Direct contribution margin, excluding Gulf response sales, declined only 20 basis points.

The effective tax rate in the quarter was 20.1 percent reflecting the release of a portion of the valuation allowance against certain foreign deferred tax assets, partly offset by net additional tax reserve accruals. Excluding the impact of restructuring expenses the Adjusted Effective Tax Rate was 21.5 percent (See Attachment 9).

2011 Expectations

“Based on our record second-quarter sales, continued progress in offsetting raw material cost inflation with price increases, and our confidence that we will achieve our full-year productivity targets, we have updated our outlook for 2011 performance,” Fyrwald said.

As announced on July 20, 2011, the Company now expects full-year Adjusted EBITDA of $740 million and Adjusted EPS of roughly $1.70, compared to its prior expectation of $735 million and $1.65, respectively. The Adjusted Effective Tax Rate for the year is expected to be approximately 34 percent, one percentage point lower than the guidance provided last quarter.

Expected 2011 Free Cash Flow remains at $85 million, reflecting both the earnings and one-time impacts of tax from divestitures, and roughly $35 million of higher rent and profit sharing payments. The Company is on track to deliver its $100 million productivity commitment. Additional information on the previously mentioned tax benefit in the second quarter and the Company’s 2011 expectations is available in the second quarter 2011 Investor Supplement on the Company’s website at www.nalco.com/investors.

Conference Call/Webcast

Nalco will discuss second-quarter 2011 results in a conference call and audio-only webcast to be held on Wednesday, August 3rd at 10 a.m. ET. Information on the conference call and webcast is available on our website at www.nalco.com/investors.

About Nalco

Nalco is the world’s largest sustainability services company focused on industrial water, energy and air applications; delivering significant environmental, social and economic performance benefits to our customers. We help our customers reduce energy, water and other natural resource consumption, enhance air quality, minimize environmental releases and improve productivity and end products while boosting the bottom line. Together our comprehensive solutions contribute to the sustainable development of customer operations. Nalco is a member of the Dow Jones Sustainability World and

NALCO COMPANY

North America Indexes. More than 12,000 Nalco employees operate in 150 countries supported by a comprehensive network of manufacturing facilities, sales offices and research centers to serve a broad range of end markets. In 2010, Nalco achieved sales of $4.25 billion. For more information visit www.nalco.com.

Several non-GAAP measures are discussed in today’s press release. Management believes that discussion of these measures provides investors with additional insight into the ongoing operations of Nalco Holding Company. Non-GAAP measures are reconciled to the closest GAAP measure in schedules attached to this press release, which may also be found at www.nalco.com/investors. EBITDA is a non-GAAP measure used by management as an internal operating metric and for enterprise valuation purposes. Adjusted EBITDA is a non-GAAP measure that includes adjusting for restructuring expenses and unusual items. Reconciliation to net earnings is included in Attachment 4. Free Cash Flow is reconciled on Attachment 7 to Cash from Operations as shown on Nalco’s Cash Flow Statement, and is defined as Cash from Operations less Capital Expenditures and Noncontrolling Interest charges. Adjusted EPS is a non-GAAP measure that includes adjusting for restructuring expenses and unusual items. Reconciliation to reported EPS as shown on Nalco’s Statement of Operations is included in Attachment 8. Adjusted Effective Tax Rate is defined as the income tax provision excluding the tax expense (benefit) of specified transactions, divided by earnings before income taxes excluding the earnings (loss) before income taxes attributable to those specified transactions. It is reconciled to the actual effective tax rate on Attachment 9. In addition, Nalco may discuss sales growth in terms of reported (actual), organic (reported less foreign currency and acquisition/divestiture/merger/joint venture/perimeter impacts), and real (organic growth less that portion of the growth which consists of price increases that simply pass along higher purchased material and freight costs) The non-GAAP measures should not be viewed as alternatives to GAAP measures of performance. Furthermore, these measures may not be consistent with similar measures provided by other companies.

Cautionary Statements Regarding Forward-Looking Information

This communication includes forward-looking statements concerning the company’s financial results and outlook for 2011, reflecting current analysis and expectations, based on what are believed to be reasonable assumptions. Forward-looking statements may involve known and unknown risks, uncertainties and other factors, which may cause the actual results to differ materially froam those projected, stated or implied, depending on many factors, including, without limitation: ability to generate cash, ability to raise capital, ability to refinance, the result of the pursuit of strategic alternatives, ability to execute work process redesign and reduce costs, ability to execute price increases, business climate, business performance, economic and competitive uncertainties, higher manufacturing costs, reduced level of customer orders, changes in strategies, risks in developing new products and technologies, environmental and safety regulations and cleanup costs, foreign exchange rates, the impact of changes in the regulation or value of pension fund assets and liabilities, changes in generally accepted accounting principles, adverse legal and regulatory developments, including increases in the number or financial exposures of claims, lawsuits, settlements or judgments, or the inability to eliminate or reduce such financial exposures by collecting indemnity payments from insurers and other third parties, the impact of increased accruals and reserves for such exposures, weather-related factors, and adverse changes in economic and political climates around the world, including terrorism and international hostilities, and other risk factors identified by the company in its most recent filing on Form 10-K and other Securities and Exchange Commission filings. Accordingly, there can be no assurance that the company will meet future results, performance or achievements expressed or implied by such forward-looking statements.

This communication also contains other forward-looking statements that include, but are not limited to, statements regarding benefits of the merger, integration plans and expected synergies, the expected timing of completion of the merger, and anticipated future financial and operating performance and results, including estimates for growth. These statements are based on the current expectations of management of Nalco Holding Company (“Nalco”) and Ecolab Inc. (“Ecolab”), as applicable. There are a number of risks and uncertainties that could cause actual results to differ materially from the forward-looking statements included in this communication. These risks and uncertainties include (i) the risk that the stockholders of Nalco may not adopt the merger agreement, (ii) the risk that the stockholders of Ecolab may not approve the issuance of Ecolab common stock to Nalco stockholders in the merger, (iii) the risk that the companies may be unable to obtain regulatory approvals required for the merger, or that required regulatory approvals may delay the merger or result in the imposition of conditions that could have a material adverse effect on the combined company or cause the companies to abandon the merger, (iv) the risk that the conditions to the closing of the merger may not be satisfied, (v) the risk that a material adverse change, event or occurrence may affect Nalco or Ecolab prior to the closing of the merger and may delay the merger or cause the companies to abandon the merger, (vi) the risk that an unsolicited offer by another company to acquire shares or assets of

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Nalco or Ecolab could interfere with or prevent the merger, (vii) problems that may arise in successfully integrating the businesses of the companies, which may result in the combined company not operating as effectively and efficiently as expected, (viii) the possibility that the merger may involve unexpected costs, unexpected liabilities or unexpected delays, (ix) the risk that the credit ratings of the combined company or its subsidiaries may be different from what the companies currently expect, (x) the risk that the businesses of the companies may suffer as a result of uncertainty surrounding the merger and (xi) the risk that disruptions from the transaction will harm relationships with customers, employees and suppliers.

Other unknown or unpredictable factors could also have material adverse effects on future results, performance or achievements of Nalco, Ecolab and the combined company. For a further discussion of these and other risks and uncertainties applicable to the respective businesses of Nalco and Ecolab, see the Annual Reports on Form 10-K of Nalco and Ecolab for the fiscal year ended December 31, 2010 and the companies’ other public filings with the Securities and Exchange Commission (the “SEC”). These risks, as well as other risks associated with the merger, will be more fully discussed in the joint proxy statement/prospectus that will be included in the Registration Statement on Form S-4 that Ecolab will file with the SEC in connection with the merger. In light of these risks, uncertainties, assumptions and factors, the forward-looking events discussed in this communication may not occur. Readers are cautioned not to place undue reliance on these forward-looking statements, which speak only as of the date of this communication. Neither Nalco nor Ecolab undertakes, and each of them expressly disclaims, any duty to update any forward-looking statement whether as a result of new information, future events or changes in their respective expectations, except as required by law.

Additional Information and Where to Find It

Ecolab will file with the SEC a registration statement on Form S-4 that will include a joint proxy statement of Nalco and Ecolab that will also constitute a prospectus of Ecolab relating to the proposed transaction. WE URGE INVESTORS AND SECURITY HOLDERS TO READ THE REGISTRATION STATEMENT AND JOINT PROXY STATEMENT/PROSPECTUS AND ANY OTHER RELEVANT DOCUMENTS WHEN THEY BECOME AVAILABLE, BECAUSE THEY WILL CONTAIN IMPORTANT INFORMATION about Nalco, Ecolab and the proposed merger. Investors and security holders will be able to obtain these materials (when they are available) and other documents filed with the SEC free of charge at the SEC’s website, www.sec.gov. In addition, copies of the registration statement and joint proxy statement/prospectus (when they become available) may be obtained free of charge by accessing Nalco’s website at www.nalco.com by clicking on the “Investors” link and then clicking on the “SEC Filings” link or by writing Nalco at 1601 West Diehl Road, Naperville, Illinois 60563, Attention: Corporate Secretary or by accessing Ecolab’s website at www.ecolab.com by clicking on the “Investor” link and then clicking on the “SEC Filings” link or by writing Ecolab at 370 Wabasha Street North, Saint Paul, Minnesota, 55102, Attention: Corporate Secretary and security holders may also read and copy any reports, statements and other information filed by Nalco or Ecolab with the SEC, at the SEC public reference room at 100 F Street, N.E.,Washington, D.C. 20549. Please call the SEC at 1-800-SEC-0330 or visit the SEC’s website for further information on its public reference room.

Participants in the Merger Solicitation

Nalco, Ecolab and certain of their respective directors, executive officers and other members of management and employees may be deemed to be participants in the solicitation of proxies in respect of the proposed transaction. Information regarding Nalco’s directors and executive officers is available in its proxy statement filed with the SEC by Nalco on March 14, 2011 in connection with its 2011 annual meeting of shareholders, and information regarding Ecolab’s directors and executive officers is available in its proxy statement filed with the SEC by Ecolab on March 18, 2011 in connection with its 2011 annual meeting of shareholders. Other information regarding the participants in the proxy solicitation and a description of their direct and indirect interests, by security holdings or otherwise, will be contained in the registration statement and joint proxy statement/prospectus and other relevant materials to be filed with the SEC when they become available.

Non-Solicitation

This communication does not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction.

Attachments

Nalco Holding Company and Subsidiaries

Condensed Consolidated Balance Sheets

(dollars in millions)

ATTACHMENT 1

Nalco Holding Company and Subsidiaries

Condensed Consolidated Statements of Operations

(Unaudited)

(dollars in millions, except per share amounts)

ATTACHMENT 2

Nalco Holding Company and Subsidiaries

Condensed Consolidated Statements of Cash Flows

(Unaudited)

(dollars in millions)

ATTACHMENT 3

Nalco Holding Company and Subsidiaries

EBITDA

(Unaudited)

(dollars in millions)

ATTACHMENT 4

Nalco Holding Company and Subsidiaries

Segment Information

(Unaudited)

(dollars in millions)

Net sales by reportable segment were as follows:

The following table presents direct contribution by reportable segment and reconciles the total segment direct contribution to earnings before income taxes:

ATTACHMENT 5

Nalco Holding Company and Subsidiaries

Regional Performance

(Unaudited)

(dollars in millions)

The following table presents, by region, net sales for the period, the changes in reported and organic net sales from the year-ago period, the Adjusted EBITDA margin for the period, and the basis-points (bps) changes in Adjusted EBITDA margin from the year-ago period:

ATTACHMENT 6

Nalco Holding Company and Subsidiaries

Free Cash Flow

(Unaudited)

(dollars in millions)

ATTACHMENT 7

Nalco Holding Company and Subsidiaries

Earnings Per Share Data

(Unaudited)

ATTACHMENT 8

Nalco Holding Company and Subsidiaries

Adjusted Effective Income Tax Rate

(Unaudited)

(dollars in millions)

ATTACHMENT 9