Sylvan Lake
Sylvan Lake in Noble County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 653 acres.
- Area
- 653 acres
Next lake in Noble County
Swipe left or right on this bar to open the next or previous lake.
Why Sylvan 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 Sylvan 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 IDEM and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Sylvan Lake is a 653-acre lake in Noble County, Indiana.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Sylvan Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Sylvan 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 Sylvan Lake
Compare lakeside cabins, hotels, and vacation rentals near Sylvan Lake in Noble County, Indiana — 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 Sylvan Lake
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Indiana’s top lakes →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 653 acres |
No bathymetric survey has been published for Sylvan Lake, so its depth is not documented here.
Fishing Sylvan Lake
Nearby Lakes in Noble County
Frequently asked questions about Sylvan Lake
Where is Sylvan Lake?
- Sylvan Lake is a lake in Noble County, Indiana. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Sylvan Lake?
- Sylvan Lake in Noble County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 653 acres.
Is Sylvan Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Sylvan 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 Sylvan Lake across LakeQuality
Species activity outlook by water temperature and season
Top lakes and where to stay in the Northern Indiana Lake Country area
Where to stay at Indiana's top lakes, each with its grade
Indiana's cleanest and most-polluted lakes, ranked
More Indiana Lake Rankings
Other Lakes in Indiana
Where this data comes from
Measurements for Sylvan Lake come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.