X0202 4 2005-08-17 0 0000276209 CONNECTICUT WATER SERVICE INC / CT CTWS 0001217201 ONEILL TERRANCE P C/O CONNECTICUT WATER SERVICE, INC. 93 WEST MAIN STREET CLINTON CT 06413 0 1 0 0 Vice President, Operations Common Stock Option Sale 2005-08-17 2005-08-17 4 S 0 2600 24.95 D 37683 D Common Stock Exercise & Sale 22.33 2005-08-17 2005-08-17 4 M 0 655 22.33 D 2000-12-08 2009-12-08 Option 655 37555 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 M 0 1945 20.42 D 2001-12-06 2010-12-06 Option 1945 37555 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 200 24.75 D 2001-12-06 2010-12-06 Option 200 37355 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 450 24.78 D 2001-12-06 2010-12-06 Option 450 36905 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 50 24.82 D 2001-12-06 2010-12-06 Option 50 36855 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 100 24.84 D 2001-12-06 2010-12-06 Option 100 36755 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 360 24.85 D 2001-12-06 2010-12-06 Option 360 36395 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 99 24.88 D 2001-12-06 2010-12-06 Option 99 36296 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 99 24.89 D 2001-12-06 2010-12-06 Option 99 36197 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 142 24.94 D 2001-12-06 2010-12-06 Option 142 36055 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 800 24.95 D 2001-12-06 2010-12-06 Option 800 35255 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 100 24.99 D 2001-12-06 2010-12-06 Option 100 35155 D Common Stock Exercise & Sale 20.42 2005-08-17 2005-08-17 4 S 0 200 25.05 D 2001-12-06 2010-12-06 Option 200 34955 D This report covers the final sales of 10,550 stock options, exercised 8/12/2005. 3,000 were sold on 8/12/2005 and reported on Form 4, dated 8/15,2005; 4,350 were sold on 8/15/2005 and reported on Form 4, dated 8/16/2005; 600 were sold on 8/16/2005 and reported on Form 4, dated 8/17/2005. This Form 4 covers the sale of 2,600 option shares. /s/Michele G. DiAcri, POA for Terrance P. O'Neill 2005-08-19