An initial analysis was made of the economic impact of proposed water effluent guidelines upon certain products in the industrial phosphate industry. This analysis was based on abatement cost data supplied by the EPA. The products covered included phosphorous, phosphoric acid produced from phosphorous, and anhydrous phosphorous derivatives, and certain derivatives of phosphoric acid but not including fertilizers. The effluent guideline development document supplying the abatement costs used in this analysis indicated that zero discharge was a practical goal and that the cost of achieving zero discharge did not exceed 1.6% of the selling price of any of the products studied. On the basis of these costs, it was concluded that there would be no significant economic impact on the products studied.