What is the cleanest lake near Nla Lake?

Nla Lake in Douglas County holds a Grade B water quality score and is 29.6 miles from Nla Lake.

Why is Nla Lake not Grade A?

Nla Lake holds Grade C, with about 13.7 ft of water clarity and 8004.8 µg/L of phosphorus. The grade reflects measured water quality against Metropolitan Council thresholds. Cleaner alternatives nearby score higher on clarity, phosphorus, or chlorophyll-a.

Are these recommendations based on real data?

Yes. Every grade is calculated from EPA Water Quality Portal samples for the lake. Recommendations are limited to lakes within 30 miles of Nla Lake in Washington, with strictly higher numeric grade scores and sufficient monitoring data.

Cleaner Lakes Than Nla Lake, Top 2 Within 30 Miles, LakeQuality

Cleaner Lakes Than Nla Lake

2 higher-graded lakes within 30 miles, ranked by grade improvement and proximity.

Nla Lake carries a Grade C (Fair) water quality score. Within 30 miles, 2 lakes hold a higher grade. Nla Lake (Douglas County, Grade B, 29.6 mi away) is the closest meaningful upgrade.

Nla Lake

Douglas County, Washington · 29.6 mi from Nla Lake

+Higher grade (C → B)
+Lower phosphorus (55.9 vs 8004.8 µg/L)

Nla Lake

Okanogan County, Washington · 28 mi from Nla Lake

+Higher grade (C → B)
++9 ft water clarity

Reading the cohort

Only 2 lakes within a 30-mile radius score better than Nla Lake's Grade C. The narrow set of options reflects either a fairly clean lake to begin with or a region without a wide range of cleaner alternatives — the trip-planning decision is more constrained than the headline "cleaner lakes nearby" suggests.

The nearest cleaner alternative — Nla Lake in Douglas County — sits 29.6 miles from Nla Lake, putting it firmly in "destination trip" rather than "neighborhood swap" range. The water-quality gap has to be the deciding factor; for a casual outing, Nla Lake is the practical choice and the cleaner options are reserved for purpose-specific visits.

The EPA water-quality grading combines clarity (Secchi depth), phosphorus, and chlorophyll-a measurements from state environmental sampling. A higher letter grade reflects measurably cleaner water on those indicators, not subjective beauty or access quality — a Grade A lake might have worse boat-launch facilities or shoreline access than a Grade C neighbor, so the ranking is one input alongside the rest of trip planning. See the methodology page for the full grading formula.

How this list is built

Every lake on LakeQuality has a calculated grade from EPA Water Quality Portal samples — secchi depth, total phosphorus, and chlorophyll-a measured against Metropolitan Council thresholds. To suggest cleaner alternatives, we filter lakes within 30 miles to those with a strictly higher numeric score, then rank by grade improvement with a small proximity tiebreak. Cross-state and limited-data lakes are excluded so the list stays locally relevant.