What is the water quality grade for Black Cnyn Reservoir Ns of?

Black Cnyn Reservoir Ns of in Gem County, Idaho received a water quality grade of B (Good). Water clarity: 7.5 ft visibility. Phosphorus: 29.5 µg/L. Chlorophyll-a (algae): 3.1 µg/L.

Is Black Cnyn Reservoir Ns of safe to swim in?

Good for swimming, clear water with low algae levels. Black Cnyn Reservoir Ns of has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 3.1 µg/L. Always check local health department advisories before swimming.

Gem County, Idaho

Black Cnyn Reservoir Ns of

Grade BGood · 7.5 ft clarity

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Mesotrophic

Black Cnyn Reservoir Ns of is a mesotrophic lake in Gem County, Idaho. Water quality is graded B based on 3 sampling years through 2023. Compared to the 1 other monitored lakes in Gem County, Black Cnyn Reservoir Ns of ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Idaho DNR, last sampled 2023-08-17. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Moderate clarity, visible to about 7.5 ft. Phosphorus level: 29.5 µg/L. Chlorophyll-a: 3.1 µg/L. Trophic State Index: 48.

Metric	Value	Grade
Water Clarity (Secchi Depth)	7.5 ft	C
Phosphorus	29.5 µg/L	B
Chlorophyll-a (Algae)	3.1 µg/L	A
Trophic State Index (TSI)	48	Mesotrophic

Moderate nutrients, good water quality

Where to stay near Black Cnyn Reservoir Ns of

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