Long Pond
Columbia County, New YorkView 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
Long Pond in Columbia County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.2 ft visibility.
- Clarity
- 10.2 ft
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Watch Long Pond’s letter
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Why Long Pond has no grade
Long Pond 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, Long Pond is Not Rated — not an F. Its 10.2-foot median from 8 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.
Long Pond is a lake in Columbia County, New York.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2020-09-22. Grade methodology: LakeQuality methodology.
What Long Pond is good for
From access and monitoring records, not editorial picks.
- Clear water10.2 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 Long Pond
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10.2 ft. TSI 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10.2 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Long Pond
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Long Pond under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 3 facilities have a reported Clean Water Act violation in the past three years.
- Ancram MillAncram · 2.6 mi away · NPDES NY0006157MajorRecent violation
- Simons General StoreAncram · 2.7 mi away · NPDES NY0282448Recent violation
- Town Highway GarageAncramdale · 3.8 mi away · NPDES NY0282430Recent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Graded lakes near Long Pond
Long Pond has no grade, but these lakes within a short drive do.
Nearby Lakes in Columbia County
Frequently asked questions about Long Pond
Where is Long Pond?
- Long Pond is a lake in Columbia 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 Long Pond?
- Long Pond in Columbia County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10.2 ft visibility.
Is Long Pond safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Explore Long Pond across LakeQuality
3 documented falls within 22.4 mi, nearest Bash Bish Falls
Species activity outlook by water temperature and season
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Where this data comes from
8 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
NALMS8 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.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)