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DC Water’s Service Line Inventory and Display Maps

Maureen Schmelling

Director of Water Quality and Technology

DC Water

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Service Line Sections

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POE

Pipe Material

Public

Private

Lead

10,393

21,581

Unknown

14,687

16,182

Brass

9,605

10,142

Copper

84,680

70,495

Galvanized Iron

168

547

Non-lead

6,919

7,505

 

 

 

TOTAL

126,452

126,452

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What is a Service Line Inventory?

  • Living data system that collects service line pipe material

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    • Maintenance / repairs
    • New installations
    • Customer reports

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  • Built to add and revise data from multiple sources through time

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    • Historical data
      • Tap cards
      • Permit or engineering documents

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Sources of Data

  • Historical
    • Tap cards, permit documents
  • EPA 1991 LCR Study
    • Researched beyond tap cards

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  • Construction
    • Service line replacements—water main replacements and leak repairs
  • Meter pits
    • Service lines might be visible (DC’s are not)

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DC Water’s Interactive Map of Service Lines

  • Displays public and private pipe material data held by DC Water
  • Search by address or zoom to an area

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Translating Data to Public Information

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Data Source

Data Criteria

Pipe Material

Website description

Historical Data

 

Copper

Assess further for confirmation

Meter data

Meter size > 2"

Non-lead

Service line has 2" or greater diameter, therefore not lead

Inspection

Eyes on service line pipe

Brass

[insert date field] excavation revealed brass pipe

Research for 1991 LCR

 

Lead

Lead likely based on historic documentation

New Tap

 

Copper

New service installed

Water Quality Tests

 

Lead

Lead likely based on water test results

As-builts

 

Copper

Based on Engineering drawings

Permit Documents

> 1982

Non-Lead

Based on water service connection year

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Thank you and n to the discussion…

Maureen Schmelling

Director of Water Quality and Technology

DC Water

Maureen.Schmelling@dcwater.com

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