Deer Park Pond
Deer Park Pond in Warren County, New Jersey has a water quality grade of D (Nutrient-rich). Water clarity: 5.6 ft visibility. Phosphorus: 11.8 µg/L. Chlorophyll-a (algae): 11.4 µg/L. Surface area: 35 acres.
- Clarity
- 5.6 ft
- Area
- 35 acres
- Type
- Eutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Deer Park Pond →
Deer Park Pond is a 35-acre productive, nutrient-rich eutrophic lake in Warren County, New Jersey. Water quality is graded D based on 2 sampling years through 2024. Compared to the 1 other monitored lakes in Warren County, Deer Park Pond ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2024-04-17. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyBacteria advisory
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 5.6 ft. Phosphorus level: 11.8 µg/L. Chlorophyll-a: 11.4 µg/L. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.6 ft | Not graded |
| Phosphorus | 11.8 µg/L | Good |
| Chlorophyll-a (Algae) | 11.4 µg/L | Poor |
| Trophic State Index (TSI) | 49 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Deer Park Pond
Compare lakeside cabins, hotels, and vacation rentals near Deer Park Pond in Warren 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. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Deer Park Pond are listed below.
Top-rated places to stay near Deer Park Pond
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 35 acres |
No bathymetric survey has been published for Deer Park Pond, so its depth is not documented here.
Fishing Deer Park Pond
Reservoir Info (USACE NID)
Deer Park Pond is a man-made reservoir impounded by the Deer Park Pond Dam, built primarily for recreation on the Musconetcong River-TR; earth-type dam, 19 ft tall and 410 ft long.
- Surface area
- 35 ac
- Normal storage
- 356 ac-ft
- Max storage
- 456 ac-ft
- Drainage area
- 0.82 sq mi
- Hazard class
- Significant
- Owner
- Division of Parks and Forestry
Source: USACE National Inventory of Dams, NID ID NJ00502 · Operator website
EPA Impairment Status
Deer Park Pond 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 NJ02040105150080-01 · Official waterbody report · Matched by proximity (1.53 km)
County Ranking
Ranked #1 of 2 lakes in Warren County
Nearby Lakes in Warren County
Frequently asked questions about Deer Park Pond
Where is Deer Park Pond?
- Deer Park Pond is a lake in Warren County, New Jersey. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Deer Park Pond?
- Deer Park Pond in Warren County, New Jersey has a water quality grade of D (Nutrient-rich). Water clarity: 5.6 ft visibility. Phosphorus: 11.8 µg/L. Chlorophyll-a (algae): 11.4 µg/L. Surface area: 35 acres.
Is Deer Park Pond safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Deer Park Pond has a water quality grade of D (Nutrient-rich). Algae concentration (chlorophyll-a) is 11.4 µg/L. Always check local health department advisories before swimming.
Explore Deer Park Pond across LakeGrade
More New Jersey Lake Rankings
Other Grade D Lakes in New Jersey
Eutrophic Lakes in New Jersey
Where this data comes from
19 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM19 samples · 2021–2024
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 2120 B ~ Color in Water by Visual Comparison
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
Impairment status from EPA ATTAINS 303(d) database