Water Management

Watermain Replacement

Find out how we ensure Delta's watermains run efficiently and our residents have access to safe, clean drinking water. Review our Watermain Construction process for details.

Three Greater Vancouver Water District reservoirs (Capilano, Seymour and Coquitlam) provide 95 per cent of the water used in Delta. The remaining five per cent comes from Delta's three wells located near Watershed Park.

Delta's water system service covers an area of approximately 18,000 hectares, which includes North Delta, Tsawwassen, Ladner, Tilbury and Annacis Island. The water system provides safe, high quality drinking water to over 100,000 residents and businesses through a 580 kilometer distribution network, 40 pressure reducing valve stations and two pump stations.

The Health of Our Water System

We take the health of our water system, and the public's trust in it, seriously. Our testing regimen meets and often exceeds the Water Monitoring Protocol set out by the provincial government.

Annual Water Quality Report

The focus of our water utility is to provide the highest quality drinking water in a sufficient quantity to meet the demands of our community.

2018 Delta Water Quality Report

Sewer, Drainage, Irrigation and Dikes

Delta operates and maintains hundreds of kilometres of storm and sanitary sewer mains, as well as drainage ditches, irrigation channels and several pump stations.

A dike system surrounds the lowlands of Delta, protecting Ladner, the farmlands and other low-lying areas. The elevation of the Delta lowlands is between 1m and 1.5m, while high tides can be 2.0m.

Integrated Liquid Waste & Resource Management Plan (ILWRMP)

Metro Vancouver is responsible for managing wastewater produced in the Lower Mainland. The Integrated Liquid Waste & Resource Management Plan (ILWRMP) (2.1 MB), approved by the regional Board and the provincial government, directs how our wastewater is managed.

Have you noticed a problem with your water?

See Common Water & Sewer Concerns for assistance. You can report the problem online or call 604-946-4141.

Backflow Prevention

Backflow prevention devices help protect the public safety by preventing potable water contamination in such critical areas as municipal water systems, food processing plants, medical and dental water supplies, and many industrial applications.


Backflow Preventer Testing

What is cross connection control?
Cross connection control is defined as the enforcement of an ordinance regulating cross connections. Municipalities and other communities set up cross connection control programs that monitor the installation, maintenance and field testing of backflow preventers in accordance with local bylaws and other codes and standards.

Getting your backflow preventer tested
Backflow preventers have internal moving parts, rubber valves, o-rings, sensing lines and springs that are subject to fouling, wear, or fatigue. All testable backflow preventers require regular testing to ensure their proper functioning. You must have your testable backflow preventers inspected and tested once a year, or more often if required by the City. This test is to maintain continued reliability and to ensure that they function as designed.

You must have your backflow preventer tested immediately after a backflow preventer has been:

  • relocated;
  • replaced;
  • repaired or cleaned internally;
  • changes/alterations to the piping that supplies the backflow preventer have been made.

Backflow Prevention Assembly Test Report Forms

The fee is $26.25 (tax incl.) payable by cash, cheque or debit and MUST accompany the completed forms. Completed forms will be validated by the Engineering Department at City Hall (4500 Clarence Taylor Crescent, Delta).

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