Tamarack Lake
Tamarack Lake in Sussex County, New Jersey is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.7 ft visibility. Surface area: 777 acres.
- Clarity
- 5.7 ft
- Area
- 777 acres
Why Tamarack Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Tamarack Lake, 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. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
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.
Tamarack Lake is a 777-acre lake in Sussex County, New Jersey.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-07-23. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedBacteria advisory
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Tamarack Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
Murky, only visible to about 5.7 ft. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Tamarack Lake
Compare lakeside cabins, hotels, and vacation rentals near Tamarack Lake in Sussex County, New Jersey — 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 Tamarack Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 777 acres |
No bathymetric survey has been published for Tamarack Lake, so its depth is not documented here.
Fishing Tamarack Lake
Reservoir Info (USACE NID)
Tamarack Lake is a man-made reservoir impounded by the Lake Mohawk Dam (completed 1927), built primarily for recreation on the Wallkill River; earth-type dam, 20 ft tall and 580 ft long.
- Surface area
- 777 ac
- Normal storage
- 8,220 ac-ft
- Max storage
- 14,220 ac-ft
- Drainage area
- 4.3 sq mi
- Hazard class
- High
- Owner
- Lake Mohawk Country Club
Source: USACE National Inventory of Dams, NID ID NJ00017 · Operator website · Matched by proximity (0.66 km)
EPA Impairment Status
Tamarack Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02020007010010-01 · Official waterbody report · Matched by proximity (2.08 km)
Graded lakes near Tamarack Lake
Tamarack Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Sussex County
Frequently asked questions about Tamarack Lake
Where is Tamarack Lake?
- Tamarack Lake is a lake in Sussex County, New Jersey. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Tamarack Lake?
- Tamarack Lake in Sussex County, New Jersey is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.7 ft visibility. Surface area: 777 acres.
Is Tamarack Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Tamarack 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 Tamarack Lake across LakeGrade
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Where this data comes from
4 measurements from 2 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Princeton Hydro LLC
PRINCETONHYDRO4 samples · 2020
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database