Conserving Water and Money
Upcoming SlideShare
Loading in...5
×
 

Conserving Water and Money

on

  • 637 views

How to justify and begin a water loss reduction program at a water utility

How to justify and begin a water loss reduction program at a water utility

Statistics

Views

Total Views
637
Views on SlideShare
633
Embed Views
4

Actions

Likes
0
Downloads
13
Comments
0

2 Embeds 4

https://www.linkedin.com 3
http://www.linkedin.com 1

Accessibility

Categories

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Conserving Water and Money Conserving Water and Money Presentation Transcript

  • Conserving Water and Money
    How to Begin and Justify a Water Loss Reduction Program
    Bernie Bouman, PE and Dan Barr, PE
  • 1978
    Kent, Ohio
  • Unaccounted For Water
    Billed Consumption
    Plant Production
    View slide
  • What is Missing?
    Unmetered Consumption
    Public Facilities
    Fire Protection
    Flushing
    Main Breaks
    Theft
    View slide
  • What Else?
    Benchmarking against other communities
    Making a business case for a water loss reduction program
  • What’s Next
  • Modern AWWA Water Audit
  • Modern AWWA Water Audit
    System Input Volume
    The annual volume input to the water supply system
    Authorized Consumption
    The annual volume of metered and/or unmetered water taken by registered customers, the water supplier, and others who are authorized to do so.
    Water Losses
    The difference between the above:
    System Input Volume – Authorized Consumption
  • Modern AWWA Water Audit
  • Modern AWWA Water Audit
    Apparent Losses
    Unauthorized Consumption, all types of customer metering inaccuracies and systematic data handling errors including theft.
    Real Losses
    The annual volumes lost through all types of leaks, breaks, and overflows up to the point of customer metering
  • Modern AWWA Water Audit
  • Modern AWWA Water Audit
    Revenue Water
    Those components of the System Input Volume that are billed and produce revenue.
    Nonrevenue Water
    The sum of Unbilled Authorized Consumption, Apparent Losses and Real Losses.
  • Free AWWA Water Audit Spreadsheet
  • Free AWWA Water Audit Spreadsheet
  • Free AWWA Water Audit Spreadsheet
  • Quantifying Unbilled Unmetered Authorized Consumption
    Spreadsheet will assume 1.25 % of Water Supplied
    Review following:
    Fire fighting and training
    Flushing mains, sewers
    Street cleaning
    Irrigation of Public Areas
    Fountains
    Swimming pools
    Construction sites
    Unmetered Public facilities
  • Quantifying Unauthorized Consumption
    Spreadsheet will assume 0.25 % of Water Supplied
    Review following:
    Illegal connections
    Hidden meters
    Misuse of hydrants
    Bypassed or tampered with meters
    Illegally opening closed curb stops
    Uninstalled meters
  • Begin a Program
  • Accounting
    Accounting Procedures
    Manually check your processes from meter reading to customer billing
  • Metering
  • Metering
    Large and Production Meters
    Meters 2” and larger.
    Up to 60% of consumption.
    Calibrate annually.
  • Metering
    Residential Meters
    Inventory and Sample
    Average Customer Meter often needs replaced after 10 years.
  • Leakage Reduction
    Acoustic methods very cost effective
    Start with pilot
    Pressure Management
    Area Master Meters
  • Leakage Reduction
    Canton, OH Case Study
    Surveyed about 280 miles of water mains
    Found 80 leaks
    31 at hydrants
    19 at services
    23 on the main lines
  • Leakage Reduction
    Canton, OH Case Study
    Estimated 773,520 gpd from identified leaks
    Survey Cost $35,000
    $100 to $150/mile
  • Leakage Reduction
    Erie County, OH Case Study
    Surveyed 200 miles of water transmission main for a cost of $15,000
    • Located 36 leaks that were repaired
    • Reduction of 350,000 GPD of unaccounted for water!
    • Represents 12% of the water being purchased daily for Erie County!
    • Resulted in a savings of $500 daily or $182,500 per year!
    “Elimination of leaks paid for the survey.. and then some!”
  • Summary
    The AWWA M36 Water Audit Manual creates a business case and benchmarking tool.
    Starting points for water loss reduction include:
    Auditing your accounting procedures
    A meter testing and replacement program
    A leak detection survey
  • Questions?