Water Efficiency at Clayton County Water Authority Guy Pihera Water Production Manager
Contents • Background • Distribution Programs • Treatment Plant Programs
Clayton County Water Authority W.J. Hooper, 20mgd Freeman Road, 10mgd J.W. Smith, 12mgd
Conservation Plan • CCWA has a conservation plan on file with EPD • System management • Treatment plant management • Rate-making policies • Recycle & Reuse • Public education
Standard Plumbing Code • Low-flow fixtures enforced for new development
Demand Projections • No conservation measures • With SF toilet retrofit
Drought Contingency • Outdoor watering restrictions • Flushing suspension • Hydrant maintenance suspension • Purchase from neighbors Notice to customers of the Clayton County Water Authority: “Non-essential” Outdoor Water Use Definitions The ban on non-essential use is intended to reduce the demand on water reserves from lawn watering and car washing.
Georgia <10% Wisconsin 25%
Survey of State Agency Water Loss Reporting Practices …the Georgia Environmental Protection Division defines unaccounted-for water as “the difference between the total amount of water pumped into the water system from the source(s) and the amount of metered water use by the customers of the water system expressed as a percentage of the total water pumped into the system” (Rules and Regulations of the State of Georgia Chapter 391-3-2-.02 Definitions, Amended). • Final report to the American Water Works Assn, 1/02.
Production Purchased (Gallons billed) (Leaks & Flushing) Gallons unaccounted
Flow Metrix • Connect both field sensing units (FSU) to the water distribution system • FSUs can be connected to meters, service lines, fire hydrants and valves
Flow Metrix • Once the base and the FSU radios are linked, the correlation process will begin automatically • The peak that develops in the correlation function indicates a leak • It usually takes between 1-30 seconds for a peak to develop Leak
Z-Corr Digital Correlating Logger • Place unit in the field, on valve, meter, etc. • Retrieve unit • Download data • Computer correlates and shows leak location
Meter Testing and Repair • Meter is stopped • Work order generated by data processing if meter readings don’t change
Meter Testing and Repair • Meter tested up to standard
850 MG/yr $3.5 M/yr Jan 99 – Aug 00: All 3” and larger meters were tested - repaired/replaced
Summary • CCWA metered our flushing program. Before installing the Hydro-Guard Automatic Flushing Device we were flushing 3,384,000 gal/mo, manually spending at least 15 hrs/wk in personnel time. • After installing the device, our gallons flushed dropped to 933,300 gal/mo and 1-1/2 hrs/wk in personnel time. • Cost savings in flushed water estimated to be above $4500/mo or 2.5 MG/mo
Reclamation Plant Programs 17,000,000 gal/mo 1,000,000 gal/day
CCWA Practices What it Preaches • Saved 17,000,000 gal/mo at biosolids pelletizing plant by using reclaimed water for scrubber/dust removal system and sludge press belt wash. • Saved 1,200,000 gal/mo at the W.B. Casey Water Reclamation Facility by converting chlorinators to reuse water.