What is the water quality grade for Lake Alva Mid-Lake Deep?

Lake Alva Mid-Lake Deep in Missoula County, Montana received a water quality grade of A (Excellent). Water clarity: 21.6 ft visibility. Phosphorus: 6.6 µg/L.

Is Lake Alva Mid-Lake Deep safe to swim in?

Excellent for swimming, crystal clear water with minimal algae. Lake Alva Mid-Lake Deep has an overall water quality grade of A. Always check local health department advisories before swimming.

Missoula County, Montana

Lake Alva Mid-Lake Deep

Grade AExcellent · 21.6 ft clarity

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Oligotrophic

Lake Alva Mid-Lake Deep is a cold, clear oligotrophic lake in Missoula County, Montana. Water quality is graded A based on 2 sampling years through 2021. Compared to the 59 other monitored lakes in Missoula County, Lake Alva Mid-Lake Deep ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, Montana DNR, last sampled 2021-09-17. Grade methodology: LakeGrade methodology.

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Swimming Safety

Excellent for swimming, crystal clear water with minimal algae

Water Quality Grade: A, Excellent

Crystal clear, you can see 21.6 ft down. Phosphorus level: 6.6 µg/L. Trophic State Index: 32.

Metric	Value	Grade
Water Clarity (Secchi Depth)	21.6 ft	A
Phosphorus	6.6 µg/L	A
Chlorophyll-a (Algae)	No data
Trophic State Index (TSI)	32	Oligotrophic

Low nutrients, clear water, excellent for swimming

Where to stay near Lake Alva Mid-Lake Deep

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