Toronto, Canada, September 18, 2007

Breakwater Resources Ltd. (TSX – BWR) (“Breakwater”) today announced an update to its mineral reserves and mineral resources estimates for the Langlois mine, prepared in accordance with National Instrument 43-101 ("NI 43-101"). Langlois, which is situated in north-western Québec approximately 213 kilometres north of Val-d’Or, reached commercial production as of July 1, 2007.

To September 1, 2007, 38,608 metres of the 50,360 metre diamond drill program planned for 2007 at Langlois have been completed. The 2007 drill program at Langlois was designed to investigate the highly prospective extensions of all the known zones containing resources and reserves at the mine. During the first half of 2007, Zones 3 and 4 surface extensions were drilled from surface and economic mineralization was encountered which extends from the current workings to surface and consequently new resources were estimated for Zones 3 and 4. During the second quarter of 2007, the Certificate of Authorization was received from the Ministère du Développement Durable, de l’Environnment et des Parcs for the Grevet B mine. Following receipt of the Certificate of Authorization, a portion of the Grevet B mineral resources was reclassified into mineral reserves. Grevet B material will be mined and milled during 2007 and 2008.

To June 30, 2007, mineral reserves at Langlois have increased by 325,000 tonnes in the area of the current workings for Zone 3 and 4 to surface after mining 186,500 tonnes. A new ramp from surface was collared during the first quarter of 2007. By the beginning of the third quarter of 2007, the new ramp had accessed the upper portions of Zone 4 between the current mining areas and surface. The mining of this material is not included in the current mine plan and, although lower grade, is economic at current prices.

NOTES TO INVESTORS CONCERNING ESTIMATES

Cautionary note to investors concerning estimates of Measured and Indicated Resources. This news release may use the terms “measured resources” and “indicated resources”. The Company advises investors that while those terms are recognized and required by Canadian regulations, the U.S. Securities and Exchange Commission (the “SEC”) does not recognize them. Investors are cautioned not to assume that any part or all of the mineral deposits in these categories will ever be converted into reserves.

Cautionary note to investors concerning estimates of Inferred Resources.

This news release may also use the term “inferred resources”. The Company advises investors that while this term is recognized and required by Canadian regulations, the SEC does not recognize it. “Inferred resources” have a great amount of uncertainty as to their existence, and great uncertainty as to their economic and legal feasibility. It cannot be assumed that all or any part of an inferred mineral resource will ever be upgraded to a higher category. Under Canadian rules, estimates of inferred mineral resources may not form the basis of feasibility or prefeasibility studies, except in rare cases. Investors are cautioned not to assume that part or all of an inferred resource exists, or is economically or legally mineable.

Metal Price Assumptions

For the June 30, 2007 mineral reserves estimates, metal prices, including premiums, used to determine economic viability for Zones 3, 4 and 97 were US$1.12/lb. zinc, C$/US$ exchange rate of 1.09, US$600/oz. gold, US$12.00/oz. silver, US$2.55/lb. copper and US$0.54/lb. lead. For the newly defined upper portions of Zones 3 and 4 and for Grevet B, a satellite deposit at Langlois, the metal prices used were US$1.45/lb. zinc, C$/US$ exchange rate of 1.09, US$12.00/oz. silver and US$3.27/lb. copper. Higher prices were used on these deposits as it is expected that they will be mined over the next two years.

Scientific and Technical Data

The Company is reporting mineral resource and reserve estimates in accordance with the CIM guidelines for the estimation, classification and reporting of resources and reserves. The Canadian Securities Administrators’ National Instrument 43-101 (“NI 43-101”) requires mining companies to disclose reserves and resources using the subcategories of “proven” reserves, “probable” reserves, “measured” resources, “indicated” resources and “inferred” resources. Mineral resources that are not mineral reserves do not have demonstrated economic viability.

A mineral reserve is the economically mineable part of a measured or indicated resource demonstrated by at least a preliminary feasibility study. This study must include adequate information on mining, processing, metallurgical, economic and other relevant factors that demonstrate, at the time of reporting, that economic extraction can be justified. A mineral reserve includes diluting materials and allows for losses that may occur when the material is mined. A proven mineral reserve is the economically mineable part of a measured resource for which quantity, grade or quality, densities, shape and physical characteristics are so well established that they can be estimated with confidence sufficient to allow the appropriate application of technical and economic parameters, to support production planning and evaluation of the economic viability of the deposit. A probable mineral reserve is the economically mineable part of an indicated mineral resource for which quantity, grade or quality, densities, shape and physical characteristics can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters, to support mine planning and evaluation of the economic viability of the deposit.

A mineral resource is a concentration or occurrence of natural, solid, inorganic or fossilized organic material in or on the earth’s crust in such form and quantity and of such a grade or quality that it has reasonable prospects for economic extraction. The location, quantity, grade, geological characteristics and continuity of a mineral resource are known, estimated or interpreted from specific geological evidence and knowledge. A measured mineral resource is that part of a mineral resource for which quantity, grade or quality, densities, shape, physical characteristics, can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters, to support mine planning and evaluation of the economic viability of the deposit. The estimate is based on detailed and reliable exploration, sampling and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough to confirm both geological and grade continuity. An indicated mineral resource is that part of a mineral resource for which quantity, grade or quality, densities, shape and physical characteristics can be estimated with a level of confidence sufficient to allow the appropriate application of technical and economic parameters, to support mine planning and evaluation of the economic viability of the deposit. The estimate is based on detailed and reliable exploration and testing information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes that are spaced closely enough for geological and grade continuity to be reasonably assumed. An inferred mineral resource is that part of a mineral resource for which quantity and grade or quality can be estimated on the basis of geological evidence and limited sampling and reasonably assumed, but not verified, geological and grade continuity. The estimate is based on limited information and sampling gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill holes. Mineral resources which are not mineral reserves do not have demonstrated economic viability.

Investors are cautioned not to assume that part or all of an inferred resource exists, or is economically or legally mineable.

The effective date of the Company’s mineral reserves and mineral resources estimate for Langlois is June 30, 2007. The 2007 estimated measured and indicated mineral resource and the estimated inferred mineral resource were prepared under the supervision of Torben Jensen, P.Eng., who is employed by the Company as VP, Engineering and who is a Qualified Person under NI 43-101. The Company advises investors that while the terms measured resources, indicated resources and inferred resources are recognized and required by Canadian Regulations, the SEC does not recognize them.

The qualified person responsible for the Langlois mineral reserve and mineral resource estimates for Zones 3 and 4 is Donald Gervais, member of l’Ordre des géologues du Québec, Chief Geologist. The mineral resources and mineral reserves at Langlois are estimated utilizing twodimensional polygons on cross-section, using the information from core drilling and underground chip sampling across development faces. Two-dimensional kriging and polygons on longitudinal section have also been used to a lesser degree, typically in areas where there is less available data.

The qualified person responsible for the Langlois mineral reserve and mineral resource estimates for Zone 97 is Jean-François Couture, P.Geo. of SRK Consulting. From the borehole database coded by the Company, SRK extracted intercept data for three sulphide-bearing zones (North, Main and South) comprised within Zone 97 and constructed solid bodies for each sulphide zone. Limits of each zone were determined visually on vertical sections based on geology, sulphide abundance and mineralogy and not based on an arbitrary lower zinc cut-off. Assay data for zinc, copper, silver and gold were density-weighted and composited over the true thickness of each zone. Variography analysis and kriging was completed on the product of the composited densityweighted grades and the true thickness. Grade for individual blocks in the model were derived by dividing the resulting interpolated grade/thickness by the true thickness of each block. In this way the true thickness and density variability are considered during grade interpolation, something that is not possible with polygonal sectional interpolation. Capping of the zinc grades was not deemed to be necessary because it is appropriately accounted for during kriging. Drill holes intersecting the mineralized zone at an angle less than 15 degrees were discarded, as well as those holes or underground samples that did not intersect the entire width of the mineralized zone.

The qualified person responsible for the Grevet B mineral resource estimate is Bernard Salmon, Eng. of Scott Wilson RPA. Scott Wilson RPA carried out mineral resource estimation for the Grevet B deposit using 3D block modeling. A total of six lenses were interpreted, namely #1, #2, #2 North, #3, #3 North and #3 South. The Grevet B mineralization contains significant values for three elements: zinc, copper and silver. An NSR value was determined by the Company for each metal unit. These metal units were then used to calculate the NSR value of each sample interval while defining the resource envelopes, and of each mineralized block while determining the resource estimates. Zn, Cu, and Ag grades of each sample have been converted into dollar values based on the smelter parameter. The minimum mining width used for interpretation of the lenses is 2.0 metres. The lenses were interpreted from drill holes projected on level plans at every 10 metres from Elevation 2980 metres to Elevation 2820 metres, over a strike length of about 300 metres. The 3D solid of each lens was created by adding tie lines to plan views in order to create 3D tins. The Grevet B mineral resource estimate was further classified by Donald Gervais, Chief Geologist, Langlois mine into mineral reserves and mineral resources following the receipt of the Certificate of Authorization from the Ministère du Développment duarable, de l’Environnment et des Parcs for the Grevet B mine.

Forward-looking Statements

The information in this news release has been prepared as at June 30, 2007. Certain information included in this news release constitute “forward-looking statements”. The words “expect”, “will”, “intend”, “estimate” and similar expressions identify forward-looking statements. Forward-looking statements are necessarily based upon a number of estimates and assumptions that, while considered reasonable by management, are inherently subject to significant business, economic and competitive uncertainties and contingencies. The Company cautions the reader that such forward-looking statements involve known and unknown risks, uncertainties and other factors that may cause the actual results, performance or achievements of the Company to be materially different from the Company’s estimated future results, performance or achievements expressed or implied by those forward-looking statements and the forward-looking statements are not guarantees of future performance. These risks, uncertainties and other factors include, but are not limited to, risks associated with the mining industry such as government regulation, environmental and reclamation risks, title disputes or claims, success of mining activities, future commodity prices, costs of production, possible variation in mineral reserves, mineral resources, grade or recovery rates, failure of plant, equipment or processes to operate as anticipated, accidents, labour disputes, the timing of estimated future production, capital expenditures, financial market fluctuations, requirements for additional capital, conclusions of economic evaluations, limitations on insurance coverage, risks associated with using third-party contractors, inflation as well as those factors discussed in the Company’s most recent Form 40- F/Annual Information Form on file with the SEC and Canadian provincial securities regulatory authorities.

The Company disclaims any intention or obligation to update or revise any forward-looking statements whether as a result of new information, future events or otherwise, except as required by applicable law.

Should you require further information please contact:

Torben Jensen, P.Eng.
Vice President, Engineering
(416) 363-4798 Ext. 232
TJensen@breakwater.ca

or

Ann Wilkinson
Vice President, Investor Relations
416-363-4798 Ext. 277
AWilkinson@breakwater.ca