Lower Sweetheart Lake
Lower Sweetheart Lake in Juneau County, Alaska is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1236 acres.
- Area
- 1,236 acres
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Why Lower Sweetheart 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 Lower Sweetheart Lake, no water-quality sampling on record for this lake.
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 your state environmental agency and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lower Sweetheart Lake is a 1,236-acre lake in Juneau County, Alaska.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled recent years. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lower Sweetheart Lake
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Lower Sweetheart Lake
Compare lakeside cabins, hotels, and vacation rentals near Lower Sweetheart Lake in Juneau County, Alaska — 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.
Top-rated places to stay near Lower Sweetheart Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 1,236 acres |
No bathymetric survey has been published for Lower Sweetheart Lake, so its depth is not documented here.
Fishing Lower Sweetheart Lake
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Frequently asked questions about Lower Sweetheart Lake
Where is Lower Sweetheart Lake?
- Lower Sweetheart Lake is a lake in Juneau County, Alaska. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Lower Sweetheart Lake?
- Lower Sweetheart Lake in Juneau County, Alaska is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 1236 acres.
Is Lower Sweetheart Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lower Sweetheart Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Explore Lower Sweetheart Lake across LakeQuality
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Where this data comes from
Measurements for Lower Sweetheart Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.