What is the water quality grade for Nla Lake?

Nla Lake in Valley County, Idaho received a water quality grade of C (Fair). Water clarity: 9 ft visibility. Phosphorus: 43.9 µg/L. Chlorophyll-a (algae): 17 µg/L.

Is Nla Lake safe to swim in?

Swim with caution, moderate algae may be present. Nla Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 17 µg/L. Always check local health department advisories before swimming.

Valley County, Idaho · 44.37°N

Nla Lake

Grade CFair · 9 ft clarity

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Eutrophic

Nla Lake is a productive, nutrient-rich eutrophic lake in Valley County, Idaho. Water quality is graded C based on 3 sampling years through 2017. Compared to the 14 other monitored lakes in Valley County, Nla Lake ranks #12 for water quality.

Source: EPA Water Quality Portal sampling records, Idaho DNR, last sampled 2017-08-17. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

Water Quality Grade: C, Fair

Moderate clarity, visible to about 9 ft. Phosphorus level: 43.9 µg/L. Chlorophyll-a: 17 µg/L. Trophic State Index: 54.

Metric	Value	Grade
Water Clarity (Secchi Depth)	9 ft	C
Phosphorus	43.9 µg/L	C
Chlorophyll-a (Algae)	17 µg/L	C
Trophic State Index (TSI)	54	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Nla Lake

Compare lakeside cabins, hotels, and vacation rentals near Nla Lake in Valley County, Idaho — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.

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