Duhamel Water System

Annual Drinking Water Information

Size and number of connections

The system services 93 active connections.


The system is located in the community of Duhamel on the north shore of the west arm of Kootenay Lake approximately 13 km northeast of Nelson. Duhamel is within RDCK Electoral Area F.


The system draws water from a 156-foot groundwater well in an aquifer designated as being high-to-moderate vulnerability due to moderate levels of development as classified by the Ministry of Environment. The source area is designated as a Community Watershed.

System Description

Insufficient information exists regarding the date when this system was first developed; however, some system components were upgraded in 2005.


There is no water treatment implemented in the system as historical water quality tests suggests the groundwater source is not under the direct influence of surface water.


The system includes a 454,000 litre concrete reservoir. This level of capacity meets existing water demands in the area and could support moderate growth.

Distribution System

The distribution system is gravity fed from the reservoir. As a result, in the summer watering season, portions of the network at higher elevation are prone to low pressure problems. About half of the distribution system has been identified as requiring near-future replacement. 

Leak detection was performed in 2020 by isolating sections of main line and measuring flow rates.  Several large leaks were discovered and repairs have been made. This leakage results in higher water demand and increased pumping costs. The Regional District is performing leak detection work to locate significant leaks on the Duhamel Community Water system lines, as well as leaks on individual property service valves.  


The system does not meet standardized requirements for fire protection. However, the Duhamel water system was reviewed by the Fire Underwriters Survey in 2014 and is now recognized as having a Dwelling Protection grade based on available fire flows from one hydrant. Subscribing insurance providers can now get water system grading information from Fire Underwriters Survey so contact your insurance provider for additional details.

Significant Issues

A significant proportion of water system infrastructure is situated on privately owned land in Duhamel. 

A significant leak was repaired in the summer of 2020; however, other existing leaks remain within the distribution system. Operators continue to investigate the location and volumes for repair and/or replacement of water main and valves. 

Plans for Future Upgrades

Asbestos cement pipe replacement is planned for 2022.

Asset Management Planning

An Asset Management Plan (AMP) is complete and being updated annually.  The 2018 AMP summary report can be viewed HERE.

The RDCK has received grant funding under the Federation of Canadian Municipalities (FCM), Municipal Asset Management Program (MAMP) in 2018 to develop a Risk & Criticality Assessment model for the water system's distribution network.  This Risk & Criticality Assessment model is now a component of the AMP and is included when RDCK management considers asset replacement dates or the prioritization of upgrade work on the highest risk/highest need.


Given the evolving regulatory framework, complexity of, and liabilities inherent in water systems management, the Duhamel Commission of Management was dissolved in 2016. A Community Advisory Committee (CAC) will be established should there be interest from the community. The Regional District would like to thank all past Commission members for their service.

This system is currently owned and operated by the RDCK. 

The content on this page was last updated April 26 2022 at 1:22 PM