Friends Lake
Warren County, New York450 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
Friends Lake in Warren County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13.8 ft visibility. Surface area: 450 acres.
- Clarity
- 13.8 ft
- Area
- 450 acres
- Trend
- ↑ Improving
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Stays near Friends Lake
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Watch Friends Lake’s letter
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Why Friends Lake has no grade
Friends Lake 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, Friends Lake is Not Rated — not an F. Its 13.8-foot median from 6 readings collected 2021 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.
Friends Lake is a 450-acre lake in Warren County, New York. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2021-10-05. Grade methodology: LakeQuality methodology.
What Friends Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Friends Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 13.8 ft. TSI 39.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 39 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 450 acres |
No bathymetric survey has been published for Friends Lake, so its depth is not documented here.
Fishing Friends Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +3.68 m/yr | 2 |
Reservoir Info (USACE NID)
Friends Lake is a man-made reservoir impounded by the Friends Lake Dam (completed 1954), built primarily for recreation on the TR-CHESTER CREEK; earth-type dam, 7 ft tall and 300 ft long.
- Surface area
- 450 ac
- Normal storage
- 6,300 ac-ft
- Max storage
- 6,300 ac-ft
- Drainage area
- 5.56 sq mi
- Hazard class
- Low
- Owner
- FRIENDS LAKE PROPERTY ASSOCIATION
Source: USACE National Inventory of Dams, NID ID NY01514 · Operator website
Nearby Lakes in Warren County
Frequently asked questions about Friends Lake
Where is Friends Lake?
- Friends Lake 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 Friends Lake?
- Friends Lake in Warren County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 13.8 ft visibility. Surface area: 450 acres.
Is Friends Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Friends Lake across LakeQuality
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Where this data comes from
6 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- USGS New York Water Science Center
USGS-NY6 samples · 2021
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.