Drinking Water Officers' Guide

Last updated on February 25, 2026

The Drinking Water Officers’ Guide contains all provincial health policy related to drinking water. In 2007, the Minister of Health released the document to guide issuing officials (drinking water officers and public health engineers) in their decision making. An updated version of the guide was published in 2024.

Structure of the Drinking Water Officers’ Guide

The guide is divided into four parts: an Introduction, Part A, Part B and Part C (Appendices). The Introduction provides an overview of the Guide including updates in the most recent version. Part A provides guidance on interpreting the requirements in the Drinking Water Protection Act and Drinking Water Protection Regulation. Part B contains a series of guideline documents on technical and procedural issues. The appendices in Part C provide samples of forms and letters required for fulfilling certain sections of the legislation. The health authorities may use or require alternate versions of these forms.

New guideline publications are identified as Version 1.0. Sub-numbering (example Version 1.2, 1.3) indicates minor document edits. Substantive changes to a guideline are noted by a new version number (example Version 2.0).

Download the guidelines

Document Last Updated 

Drinking Water Officer's Guide (Consolidated) (PDF, 7.9MB)

April 03, 2025

Download individual guideline documents

Document

Published

Last Updated

Introduction (PDF, 50KB)

2007

2024

Part A | Legislative Requirements (PDF, 794KB)

2007

2025

Part B.1 | Determining Appropriate Drinking Water Chemical and Physical Monitoring Guidelines (PDF, 248KB)

2014

2025

Part B.2 | Requests for Investigation of a Drinking Water Threat Under the Drinking Water Protection Act (PDF, 171KB)

2014

2024

Part B.3 | Strategies, Tools and Procedures Health Authorities May Use to Find and Regulate Small Systems (PDF, 123KB)

2014

2024

Part B.4 | Drinking Water Complaints and Inquiries Process (PDF, 137KB)

2014

2024

Part B.5 | Drinking Water Treatment Objectives (Microbiological) for Surface Water Supplies in British Columbia (PDF, 307KB)

2012

2024

Part B.6 | Drinking Water Treatment Objectives (Microbiological) for Ground Water Supplies in British Columbia (PDF, 379KB)

2015

2024

Part B.7 | British Columbia Guidelines (Microbiological) on Maintaining Water Quality in Distribution Systems (PDF, 311KB)

2016

2024

Part B.8 | Decision Protocols for Cyanobacterial Toxins in B.C. Drinking Water and Recreational Water (PDF, 774KB)

2017

2024

Part B.9 | Decision Tree for Responding to a Turbidity Event in Unfiltered Drinking Water (PDF, 382KB)

2009

2024

Part B.10 | Water Systems for Class D & E Slaughter Establishments and Other Unregulated Uses (PDF, 102KB)

2014

2024

Part B.11 | Obligations of the Water Suppliers of Drinking Water Treatment Systems that have Point of Use/Point of Entry Devices (PDF, 144KB)

2014

2024

Part B.12 | Guidelines on Evaluating and Mitigating Lead in Drinking Water Supplies, Schools, Child Care Facilities and Other Buildings (PDF, 1.3MB)

2019

2024

Part B.12.1 | Supplemental guidance for sampling lead in drinking water in school buildings (PDF, 880KB)

2025 2025

Part B.13 | Guidance on Manganese in Drinking Water (PDF, 219KB)

2019

2024

Part B.14 | Guidance for Treatment of Rainwater Harvested for Potable Use in British Columbia (PDF, 140KB)

2020

2024

Part B. 15 | Guidelines for Pathogen Log Reduction Credit Assignment (PDF, 1.2MB)

2022

2024

Part B.16 | Guidelines for Ultraviolet Disinfection of Drinking Water (PDF, 525KB)

2022

2024

Part B.17 | Design Guidelines for Drinking Water Systems in British Columbia (PDF, 4MB) 2023

2024

Part C | Appendices (PDF, 391KB)

2014

2024

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