Where is Callaghan Lake?

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

Callaghan Lake

Squamish, British ColumbiaView map Directions

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

Clarity

12.9 m

Clearer than most

Secchi · sampled 2025

Phosphorus

2.8 µg/L

Less phosphorus than most

Measured by ENV

Chlorophyll-a

0.3 µg/L

Less algae than most

Measured by ENV

Limited data

See the measurements Directions Where to stay

Callaghan Lake in Squamish, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 12.9 m visibility. Phosphorus: 2.8 µg/L. Chlorophyll-a (algae): 0.3 µg/L.

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Callaghan Lake is a lake in Squamish County, British Columbia.

Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2025-06-10. Methodology: how these readings are compared.

What Callaghan Lake is good for

From access and monitoring records, not editorial picks.

Clear water42.3 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 Callaghan 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 Callaghan Lake

These are the measurements ENV publishes for Callaghan 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 42.3 ft down. Phosphorus 2.8 µg/L. Chlorophyll-a 0.3 µg/L. TSI 20.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	12.9m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	2.8µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	0.3µg/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.	20	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Callaghan Lake

Answers come straight from the public measurements and survey records on this page.

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Fishing Callaghan Lake

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

Nearby Lakes in Squamish

Loggers Lake11.3 miView →Brohm Lake7 m clear25.9 miView →Cat Lake27.7 miView →Stump Lake28.4 miView →Fawn Lake28.8 miView →Alice Lake29.1 miView →

Frequently asked questions about Callaghan Lake

Where is Callaghan Lake?: Callaghan Lake is a lake in Squamish, British Columbia. Its water-quality measurements are published by ENV and shown on this page as reported.
What is the water quality of Callaghan Lake?: Callaghan Lake in Squamish, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 12.9 m visibility. Phosphorus: 2.8 µg/L. Chlorophyll-a (algae): 0.3 µg/L.
Is Callaghan Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.