Tuesday 3:00 PM
Water Quality 
[Presentation PDF]

Room: Sangamon

Innovative Method for Improved Water Quality at Closed Hydraulic Zone Valves

In water distribution systems, valves are closed to create hydraulic zones that improve neighborhood water pressure. These closed valves create dead-end mains that result in poor water quality. The City of Rockford set out to determine if the installation of by-passes on these valves would result in improved quality. The by-passes were designed to allow a low flow that would maintain quality but not compromise the pressure zone. Improved water quality was demonstrated with turbidity readings and duration of hydrant flow collected during the City's Annual Unidirectional Flushing Program.

Moderator:  Eduardo Gasca


Nadine Miller - City of Rockford

Nadine Miller has served as the Water Quality Supervisor for the City of Rockford for the past 10 years.  She has 25 years of experience as an analytical research chemist. She has worked in both the environmental and food industries.



Larry Pierce - City of Rockford

Larry Pierce has served as  the Water Quality Technician for the City of Rockford for the past 7 years.  He is certified in bacteriological testing.  Larry has 16 years of experience in drinking and waste water compliance.