Drought Response A Utility Perspective 2002 NECPUC Symposium June 17, 2002 Peter Galant Vice President Engineering & Utility Operations Aquarion Water Company of Connecticut

Presentation Overview n Aquarion Water Company of Connecticut n 2002 Drought –Impacts –Response n Observations n Summary

Aquarion Water Co. of CT n 170,000 customers n 587,000 people n 35 cities/towns n 25 systems Salisbury Lakeville North Canaan Norfolk Cornwall Kent Litchfield Beacon Falls Oxford Seymour Monroe Easton Weston Stratford Trumbull Shelton Ridgefield Wilton New Canaan Norwalk Darien Stamford Greenwich Glen Cove Glenwood Landing Sea Cliff Glen head Old Brookville Rosyln Harbour Westport Fairfield Bridgeport

Cumulative Rainfall Stamford System

Reservoir Capacity Stamford System

Response - Conservation DROUGHT PHASE AlertAdvisory Emergency I Emergency II Emergency III CONSERV. GOAL None Voluntary 10% Mandatory 15% Mandatory 20% Mandatory 60%

Conservation Impact Stamford System

Predicted Capacity

Statistical Analysis

Systems Affected Differently n Geography n Ground Water vs. Surface Water n Reservoir Storage/Watershed Area n Margin of Safety

Response Plans are Different n Triggers –% Capacity n Constant n Monthly –Days Storage Remaining n Risk

Response Plan Comparison Aquarion data based on March 1

Restrictions are Different

Summary n Droughts effect systems differently n Systems have different risk tolerances n Towns have different use restrictions n Impacts on water allocation planning