Where is Lillian Lake?

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

Lillian Lake

Columbia River, British ColumbiaView map Directions

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

Clarity

5.4 m

Typical for British Columbia

Secchi · sampled 2026

Phosphorus

6.3 µg/L

Typical for British Columbia

Measured by ENV

Chlorophyll-a

1.1 µg/L

Typical for British Columbia

Measured by ENV

Limited data

See the measurements Directions Where to stay

Lillian Lake in Columbia River, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 5.4 m visibility. Phosphorus: 6.3 µg/L. Chlorophyll-a (algae): 1.1 µg/L.

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Lillian Lake is a lake in Columbia River County, British Columbia.

Source: the British Columbia Ministry of Environment and Parks — not the EPA Water Quality Portal, last sampled 2026-08-25. Methodology: how these readings are compared.

What Lillian Lake is good for

From access and monitoring records, not editorial picks.

Clear water17.7 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 Lillian 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 Lillian Lake

These are the measurements ENV publishes for Lillian 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 17.7 ft down. Phosphorus 6.3 µg/L. Chlorophyll-a 1.1 µg/L. TSI 33.

Water quality readings
Measure	Reading	Where it sits
Water clarity (Secchi depth)	5.4m	Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer.
Total phosphorus	6.3µg/L	Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential.
Chlorophyll-a (algae)	1.1µg/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.	33	Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic

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

Ask about Lillian Lake

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

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Stays near Lillian Lake

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Fishing Lillian Lake

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

Nearby Lakes in Columbia River

Windermere Lake4.3 m clear3.8 miView →Columbia Lake4.3 m clear20.5 miView →Whiteswan Lake11.3 m clear37.2 miView →Premier Lake10 m clear43.8 miView →St. Mary's Lake3.4 m clear62.2 miView →Connor Lake46.1 miView →

Frequently asked questions about Lillian Lake

Where is Lillian Lake?: Lillian Lake is a lake in Columbia River, British Columbia. Its water-quality measurements are published by ENV and shown on this page as reported.
What is the water quality of Lillian Lake?: Lillian Lake in Columbia River, British Columbia has water-quality measurements published by ENV, shown here as reported. Water clarity: 5.4 m visibility. Phosphorus: 6.3 µg/L. Chlorophyll-a (algae): 1.1 µg/L.
Is Lillian Lake safe to swim in?: Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.