Nla Lower Lake
Grays Harbor County, WashingtonView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Nla Lower Lake in Grays Harbor County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 38.9 µg/L. Chlorophyll-a (algae): 0.4 µg/L.
- Phosphorus
- 38.9 µg/L
- Chlorophyll-a
- 0.4 µg/L
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Watch Nla Lower Lake’s letter
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Why Nla Lower Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Nla Lower Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WA Ecology and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Nla Lower Lake is a lake in Grays Harbor County, Washington.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled 2017-07-27. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Nla Lower Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 38.9 µg/L. Chlorophyll-a 0.4 µg/L. TSI 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 38.9 µg/L | Not graded |
| Chlorophyll-a (Algae) | 0.4 µg/L | Not graded |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Fishing Nla Lower Lake
Nearby Lakes in Grays Harbor County
Frequently asked questions about Nla Lower Lake
Where is Nla Lower Lake?
- Nla Lower Lake is a lake in Grays Harbor County, Washington. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Nla Lower Lake?
- Nla Lower Lake in Grays Harbor County, Washington is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 38.9 µg/L. Chlorophyll-a (algae): 0.4 µg/L.
Is Nla Lower Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Nla Lower Lake across LakeQuality
Planning a trip around Olympic?
Nla Lower Lake is about 25 miles from Olympic National Park. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Olympic →More Washington Lake Rankings
Other Lakes in Washington
Oligotrophic Lakes in Washington
Where this data comes from
2 measurements from 1 monitoring station, 2017. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Quinault Indian Nation (Tribal)
QIN_WQX2 samples · 2017
Analytical methods
- 4500 P H ~ Manual Digestion and Flow Injection Analysis for Total Phosphorus
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.