Duncan drinking water path

Source

Cowichan River sub-river / unconfined aquifer (four deep wells) Groundwater

raw water

Intake

Municipal wells groundwater pumping

to plant

Treatment

Duncan municipal well system / chlorinati… chlorination · filtration

finished

Mains

Distribution Distribution covers Duncan and extends into portions of North Cowichan, CVRD Areas D/E, and Cowichan Tribes lands (~15,000 people).

drinking water

Tap

Household tap Duncan

Source & supply
Cowichan River sub-river / unconfined aquifer (four deep wells)
Distribution covers Duncan and extends into portions of North Cowichan, CVRD Areas D/E, and Cowichan Tribes lands (~15,000 people).
Duncan's aquifer is unconfined and river-connected—summer Cowichan River low flows are a regional water-security concern shared with North Cowichan.
Treatment
Duncan municipal well system / chlorination
Four deep wells and two reservoirs near the Cowichan River; aquifer recharged by river and watershed filtration through pervious soils.
Treatment on record: chlorination · filtration
At the tap
Hardness 181 mg/L (Very hard)
Grade B (Good)
pH 6.8999999999999995 · lead 0.5 μg/L
ECCC / municipal open data (seed)