Lake Forest
Warren County, New York28 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Limited data
Lake Forest in Warren County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.9 ft visibility. Surface area: 28 acres.
- Clarity
- 8.9 ft
- Area
- 28 acres
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Watch Lake Forest’s letter
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Why Lake Forest has no grade
Lake Forest has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Lake Forest is Not Rated — not an F. Its 8.9-foot median from 7 readings collected 2020 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by NYSDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Forest is a 28-acre lake in Warren County, New York.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-06. 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 Lake Forest
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8.9 ft. TSI 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.9 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 28 acres |
No bathymetric survey has been published for Lake Forest, so its depth is not documented here.
Fishing Lake Forest
Reservoir Info (USACE NID)
Lake Forest is a man-made reservoir impounded by the Lake Forest Dam (completed 1973), built primarily for recreation on the TR-HUDSON RIVER; concrete-type dam, 12 ft tall and 307 ft long.
- Surface area
- 28 ac
- Normal storage
- 64 ac-ft
- Max storage
- 70 ac-ft
- Drainage area
- 2 sq mi
- Hazard class
- Low
- Owner
- NORTHWOODS ASSOCIATION INC
Source: USACE National Inventory of Dams, NID ID NY01166 · Operator website
Nearby Lakes in Warren County
Frequently asked questions about Lake Forest
Where is Lake Forest?
- Lake Forest is a lake in Warren County, New York. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Lake Forest?
- Lake Forest in Warren County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.9 ft visibility. Surface area: 28 acres.
Is Lake Forest safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
7 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS7 samples · 2020
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.