What is the water quality grade for Nla Lake?

Nla Lake in Washington County, Idaho received a water quality grade of B (Good). Water clarity: 15.1 ft visibility. Phosphorus: 41000 µg/L. Chlorophyll-a (algae): 0.3 µg/L.

Is Nla Lake safe to swim in?

Good for swimming, clear water with low algae levels. Nla Lake has an overall water quality grade of B. Algae concentration (chlorophyll-a) is 0.3 µg/L. Always check local health department advisories before swimming.

Washington County, Idaho

Nla Lake

Grade BGood · 15.1 ft clarity

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Hypereutrophic

Nla Lake is a highly nutrient-loaded hypereutrophic lake in Washington County, Idaho. Water quality is graded B based on 3 sampling years through 2012. Compared to the 2 other monitored lakes in Washington County, Nla Lake ranks #1 for water quality.

Source: EPA Water Quality Portal sampling records, Idaho DNR, last sampled 2012-07-05. Grade methodology: LakeGrade methodology.

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Swimming Safety

Good for swimming, clear water with low algae levels

Water Quality Grade: B, Good

Crystal clear, you can see 15.1 ft down. Phosphorus level: 41000 µg/L. Chlorophyll-a: 0.3 µg/L. Trophic State Index: 72.

Metric	Value	Grade
Water Clarity (Secchi Depth)	15.1 ft	A
Phosphorus	41000 µg/L	F
Chlorophyll-a (Algae)	0.3 µg/L	A
Trophic State Index (TSI)	72	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Where to stay near Nla Lake

Compare lakeside cabins, hotels, and vacation rentals near Nla Lake in Washington 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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