Exhibit 99.1

Energy Recovery, Inc. Reports Second Quarter 2010 Financial Results

Second Quarter 2010 Highlights

SAN LEANDRO, Calif.--(BUSINESS WIRE)--August 5, 2010--Energy Recovery, Inc. (Nasdaq:ERII), a leader in the design and development of energy recovery devices for desalination, announced today the results of its second quarter ended June 30, 2010. In the second quarter of 2010, ERI achieved net revenue of $13.3 million, a 46% increase compared to the net revenue for the same period last year and within the Company’s guidance range of $13 to $15 million. For the three months ended June 30, 2010, ERI reported a net loss on a generally accepted accounting principles (GAAP) basis of $322,000, or $0.01 per share, and non-GAAP net income of $80,000, or $0.00 per share. For the same period last year, ERI reported a GAAP net loss of $71,000, or $0.00 per share.

“Our second quarter results were in line with our expectations and we are seeing some real progress on key initiatives that strengthen our competitive position going forward,” said G.G. Pique, President and CEO of Energy Recovery, Inc. “We have fully integrated the PEI sales organization into our existing Mega Projects and OEM sales groups and are showing one unified sales effort to our customers with a broad menu of energy recovery options and pumps. Additionally, we are getting traction on sales of our most advanced pressure exchanger, the PX-300 device. And finally, our state-of-the-art ceramics production facility has been substantially completed and we feel confident about our ability to successfully ramp up operations and reduce operating costs by achieving our targeted yields.”

Non-GAAP Financial Measures

In evaluating the operating performance of Energy Recovery’s business, Energy Recovery management utilizes financial measures described in this press release that exclude certain non-cash charges and charges related to the purchase of Pump Engineering required by U.S. generally accepted accounting principles, or GAAP. Energy Recovery believes this additional information provides investors and management with additional insight into its underlying core operating performance.

For the calculation of Adjusted EBITDA, a net loss of $322,000 was adjusted for depreciation and amortization expense of $1.1 million, net interest expense of $13,000, tax benefit of $492,000, share-based compensation expense of $711,000 and a purchase accounting adjustment for sale of acquired inventory of $428,000 for the second quarter of 2010.

In the guidance estimates below for the third quarter and full year 2010, net income and earnings are adjusted for the purchase accounting required under GAAP for the acquisition of Pump Engineering. For the full year, the estimates include adjustments of $870,000 for a purchase accounting adjustment for the sale of acquired inventory, $2.6 million in amortization of purchased intangibles, and offset by a tax benefit of approximately $1.3 million based on a statutory tax rate.

A reconciliation of Energy Recovery’s non-GAAP financial measures to the most directly comparable GAAP measures can be found under the heading “Energy Recovery Non-GAAP Financial Reconciliation” below.

Outlook

ERI provides the following guidance on a GAAP basis for the third quarter of 2010 and the full year:

      Q3 2010       Fiscal Year 2010
 
Estimated Net Revenue $10 to $12 million $52 to $56 million
 
Estimated Net Loss ($1.6) to ($0.6) million ($2.3) to ($0.8) million
 
Estimated Loss Per Share ($0.03) to ($0.01) ($0.04) to ($0.02)

ERI provides the following non-GAAP guidance for the third quarter of 2010 and the full year:

      Q3 2010       Fiscal Year 2010
 
Estimated Adjusted Net Income (Loss) (1) ($1.1) to ($0.2) million ($0.1) to $1.4 million
 
Estimated Adjusted Earnings (Loss) Per Share (2) ($0.02) to ($0.00) ($0.00) to $0.03
 
Estimated Adjusted EBITDA (3) ($0.2) to $1.2 million $5 to $8 million

(1) Estimated Adjusted Net Income is defined as GAAP net income adjusted for the purchase accounting for the acquisition of Pump Engineering. The purchase accounting includes a purchase accounting adjustment for sale of acquired inventory, the amortization of intangible assets that were booked as a result of the acquisition, and the tax benefit generated as a result of the purchase accounting expense.

(2) Estimated Adjusted Earnings per Share is defined as Estimated Adjusted Net Income divided by the fully diluted shares. Estimated Adjusted Loss per Share is defined as Estimated Adjusted Net Loss divided by basic shares.

(3) Estimated Adjusted EBITDA is defined net income adjusted for interest expense (income), taxes, depreciation, amortization, share-based compensation, and a purchase accounting adjustment for sale of acquired inventory.

ERI provides the following guidance for the 2011 fiscal year:

      FY 2011
 
Estimated Net Revenue $60 to $70 million

Forward Looking Statements

This press release includes “forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended. Such forward-looking statements include statements about ERI’s estimated net revenue, GAAP and non-GAAP net income or loss and earnings or loss per share, and estimated adjusted net income or loss, adjusted earnings or loss per share and adjusted EBITDA, for the third quarter and 2010 fiscal year and net revenue for the 2011 fiscal year. Because such forward-looking statements involve risks and uncertainties, the Company's actual results may differ materially from the predictions in those forward-looking statements. Factors that could cause actual results to differ materially include, but are not limited to, delays in, or cancellation of, the construction of desalination plants, the inability of our customers to obtain project financing, delays in governmental approvals, changes in end users’ budgets for desalination plants or the timing of their purchasing decisions, our inability to integrate Pump Engineering’s business into ERI’s operations successfully, our ability to ship new products to meet scheduled delivery times; the world economic crisis and other risks detailed in the Company's filings with the Securities and Exchange Commission (“SEC”). All forward-looking statements are made as of today, and the Company assumes no obligation to update such statements. For more details relating to the risks and uncertainties that could cause actual results to differ materially from those anticipated in our forward-looking statements, please refer to the Company's SEC filings.

Conference Call to Discuss Second Quarter 2010 Results

The conference call scheduled today at 1:30 p.m. PDT will be in a "listen-only" mode for all participants other than the investment professionals who regularly follow the Company. The toll-free phone number for the call is 1-877-941-8610 or +1-480-629-9820 and the access code is 4329430. Callers should dial in approximately 15 minutes prior to the scheduled start time. A telephonic replay will be available at 1-800-406-7325 or +1-303-590-3030, Access Code: 4329430, until Thursday, August 19, 2010. Investors may also access the live call or the replay over the internet at www.energyrecovery.com. The replay will be available approximately three hours after the live call concludes.

About ERI®

Energy Recovery, Inc. (NASDAQ:ERII) designs and develops energy recovery devices that help make desalination affordable by significantly reducing energy consumption. Energy Recovery technologies include the PX Pressure Exchanger® device for desalination and the Turbocharger hydraulic turbine energy recovery device and pump for desalination, gas and liquid processing applications. In total, Energy Recovery helps reduce CO2 emissions by more than 4.7 million tons per year and produce 1.6 billion gallons of potable water per day. The company is headquartered in the San Francisco Bay Area with offices near Detroit and in key desalination centers worldwide, including Madrid, Shanghai and Dubai. For more information about Energy Recovery, Inc. please visit www.energyrecovery.com.


Unaudited Financial Results

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME (LOSS)

(in thousands, except per share data)

(unaudited)

   

 

Three Months Ended

June 30,

Six Months Ended

June 30,

  2010       2009     2010       2009  
Net revenue $ 13,304 $ 9,089 $ 25,919 $ 21,735
Cost of revenue   6,676     3,291     11,933     7,864  
Gross profit 6,628 5,798 13,986 13,871
Operating expenses:
General and administrative 4,339 3,508 8,755 6,662
Sales and marketing 2,142 1,651 4,102 3,161
Research and development   863     826     1,691     1,630  
Total operating expenses   7,344     5,985     14,548     11,453  
Income (loss) from operations (716 ) (187 ) (562 ) 2,418
Interest expense (17 ) (10 ) (38 ) (24 )
Other non-operating income (expense), net   (81 )   117     (99 )   29  
Income (loss) before provision for income taxes (814 ) (80 ) (699 ) 2,423
Provision for (benefit from) income taxes   (492 )   (9 )   (445 )   940  
Net income (loss) $ (322 ) $ (71 ) $ (254 ) $ 1,483  
Earnings (loss) per share:
Basic $ (0.01 ) $ (0.00 ) $ (0.00 ) $ 0.03  
Diluted $ (0.01 ) $ (0.00 ) $ (0.00 ) $ 0.03  
Number of shares used in per share calculations:
Basic   52,078     50,146     51,661     50,099  
Diluted   52,078     50,146     51,661     52,629  

ENERGY RECOVERY, INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(in thousands, except share data and par value)

(unaudited)

 

 

June 30,

2010

December 31,
2009

 

ASSETS
Current assets:
Cash and cash equivalents $ 52,109 $ 59,115
Restricted cash 7,557 5,271

Accounts receivable, net of allowance for doubtful accounts of $35
and $196 at June 30, 2010 and December 31, 2009, respectively

14,914 12,683
Unbilled receivables, current 2,378 5,544
Inventories 12,208 10,359
Deferred tax assets, net 1,467 1,466
Prepaid expenses and other current assets   3,479     1,741  
Total current assets 94,112 96,179
Restricted cash, non-current 2,311 5,555
Unbilled receivables, non-current 1,060
Property and equipment, net 22,585 16,958
Goodwill 12,790 12,790
Other intangible assets, net 9,620 10,987
Deferred tax assets, non-current, net 447 447
Other assets, non-current   43     53  
Total assets $ 142,968   $ 142,969  
LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable $ 3,611 $ 1,952
Accrued expenses and other current liabilities 9,217 9,492
Income taxes payable 45 350
Accrued warranty reserve 850 605
Deferred revenue 4,149 4,628
Current portion of long-term debt 128 265
Current portion of capital lease obligations   189     203  
Total current liabilities 18,189 17,495
Long-term debt 149 246
Capital lease obligations, non-current 276 369
Other non-current liabilities   1,838     3,890  
Total liabilities   20,452     22,000  
 
Stockholders’ equity:

Preferred stock, $0.001 par value; 10,000,000 shares authorized;
no shares issued or outstanding

Common stock, $0.001 par value; 200,000,000 shares authorized;
52,436,769 and 51,215,653 shares issued and outstanding at
June 30, 2010 and December 31, 2009, respectively

52 51
Additional paid-in capital 110,364 108,626
Notes receivable from stockholders (37 ) (90 )
Accumulated other comprehensive loss (57 ) (66 )
Retained earnings   12,194     12,448  
Total stockholders’ equity   122,516     120,969  
Total liabilities and stockholders’ equity $ 142,968   $ 142,969  

Energy Recovery Non-GAAP Financial Reconciliation (unaudited)

Second Quarter 2010:

Reconciliation of Adjusted Net Income  

Q2 2010

(in thousands)
 
Net income (loss) $ (322 )
Plus:
Purchase adjustment of acquired inventory 428
Amortization of purchased intangible assets 677
Income tax effect (1)   (703 )
Adjusted net income $ 80  

(1) Represents the application of the effective tax rate to the non-GAAP adjustments

Reconciliation of Adjusted EBITDA  

Q2 2010

(in thousands)
 
Net income (loss) $ (322 )
Plus:
Net interest 13
Tax (benefit) (492 )
Depreciation of fixed assets 457
Amortization of intangible assets 683
Share-based compensation 711
Purchase adjustment of acquired inventory   428  
Adjusted EBITDA $ 1,478  

Guidance for the third quarter of 2010 and the full year (amounts in thousands):

Reconciliation of Estimated Adjusted Net

Income (Loss)

 

Q3 2010

 

FY 2010

Low   High Low   High
 
Net income (loss) $ (1,554 ) $ (628 ) $ (2,302 ) $ (781 )
Plus:
Purchase adjustment of acquired inventory 20 20 870 870
Amortization of purchased intangible assets 677 677 2,606 2,606
Income tax effect (1)   (258 )   (258 )   (1,286 )   (1,286 )
Adjusted net income (loss) $ (1,115 ) $ (189 ) $ (112 ) $ 1,409  

(1) Represents the application of the statutory tax rate to the non-GAAP adjustments

Reconciliation of Estimated Adjusted EBITDA  

Q3 2010

 

FY 2010

Low   High Low   High
 
Net income (loss) $ (1,554 ) $ (628 ) $ (2,302 ) $ (781 )
Plus:
Net interest 7 7 41 41
Tax provision (benefit) (913 ) (369 ) (1,351 ) (459 )
Depreciation of fixed assets 724 724 2,397 2,397
Amortization of intangible assets 689 689 2,632 2,632
Share-based compensation 779 779 2,959 2,959
Purchase adjustment of acquired inventory   20     20     870     870  
Adjusted EBITDA $ (248 ) $ 1,222   $ 5,246   $ 7,659  

CONTACT:
Energy Recovery, Inc.
Tom Willardson, 510-483-7370
Chief Financial Officer