Dugan, J. T., Sharpe, J. B. 1996. Effects and Distribution of Iron-Related Well-Screen Encrustation and Aquifer Biofouling in Suffolk County, Long Island, New York (WRIR-96-4217). 29 pp., size 8.5" x 11". Description: Prepared in cooperation with the Suffolk County Water Authority (SCWA). This report 1) describes the effects of iron-related well-screen encrustation on supply wells in the SCWA network; 2) depictst, by aquifer, the spatial distribution of supply wells that have had significant specific-capacity decreases; 3) compares the quality of water from wells that have had large specific-capacity declines with that from wells that have had only small declines; and 4) depicts the spatial distribution of water consitutents that could be related to the specific-capacity declines.