Where is Cultus Lake?

Cultus Lake is a lake in Chilliwack River, British Columbia. Its water-quality measurements are published by ENV and shown on this page as reported.

Cultus Lake

Chilliwack River, British ColumbiaView map Directions

ENV publishes the water-quality measurements for Cultus Lake. Here is what has been measured.

Clarity

6.6 m

Clearer than most

Secchi · sampled 2025

Phosphorus

3.6 µg/L

Less phosphorus than most

Measured by ENV

Chlorophyll-a

1.8 µg/L

Typical for British Columbia

Measured by ENV

Limited data

See the measurements Directions Where to stay

Cultus Lake in Chilliwack River, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 6.6 m visibility. Phosphorus: 3.6 µg/L. Chlorophyll-a (algae): 1.8 µg/L.

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Cultus Lake is a lake in Chilliwack River County, British Columbia.

Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2025-04-09. Methodology: how these readings are compared.

What Cultus Lake is good for

From access and monitoring records, not editorial picks.

Clear water21.7 ft of visibility

Swimming conditions

No reading

Limited data

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Cultus Lake is safe to swim in today is a call for the British Columbia Ministry of Environment and Parks and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Cultus Lake

These are the measurements ENV publishes for Cultus Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Crystal clear, you can see 21.7 ft down. Phosphorus 3.6 µg/L. Chlorophyll-a 1.8 µg/L. TSI 31.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	6.6m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	3.6µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1.8µg/L	Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water.
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.	31	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

Low nutrients, clear water. No reading is a swimming clearance.

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Fishing Cultus Lake

→ Cultus Lake fishing regulations (limits, seasons, special rules)

Nearby Lakes in Chilliwack River

Chilliwack Lake12.6 m clear24.7 miView →Lake Errock2.9 m clear11.7 miView →Hatzic Lake13.8 miView →Grace Lake19.5 miView →Francis Lake20.5 miView →Wood Lake28.1 miView →

Frequently asked questions about Cultus Lake

Where is Cultus Lake?: Cultus Lake is a lake in Chilliwack River, British Columbia. Its water-quality measurements are published by ENV and shown on this page as reported.
What is the water quality of Cultus Lake?: Cultus Lake in Chilliwack River, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 6.6 m visibility. Phosphorus: 3.6 µg/L. Chlorophyll-a (algae): 1.8 µg/L.
Is Cultus Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.