Lake Ocquittunk
Lake Ocquittunk in Sussex County, New Jersey has a water quality grade of C (Fair). Water clarity: 4.1 ft visibility. Phosphorus: 23.2 µg/L. Chlorophyll-a (algae): 13 µg/L.
- Clarity
- 4.1 ft
- Type
- Eutrophic
Lake Ocquittunk is a productive, nutrient-rich eutrophic lake in Sussex County, New Jersey. Water quality is graded C based on 2 sampling years through 2022. Compared to the 17 other monitored lakes in Sussex County, Lake Ocquittunk ranks #3 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2022-10-26. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyLimited data
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.
Generally safe for swimming, moderate water quality
Water Quality Grade: C (Fair)
Murky, only visible to about 4.1 ft. Phosphorus level: 23.2 µg/L. Chlorophyll-a: 13 µg/L. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.1 ft | Not graded |
| Phosphorus | 23.2 µg/L | Fair |
| Chlorophyll-a (Algae) | 13 µg/L | Fair |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Ocquittunk
Compare lakeside cabins, hotels, and vacation rentals near Lake Ocquittunk 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 Lake Ocquittunk
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Fishing Lake Ocquittunk
EPA Impairment Status
Lake Ocquittunk is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NJ02040104140030-01 · Official waterbody report · Matched by proximity (1.2 km)
County Ranking
Ranked #3 of 18 lakes in Sussex County
Nearby Lakes in Sussex County
Frequently asked questions about Lake Ocquittunk
Where is Lake Ocquittunk?
- Lake Ocquittunk is a lake in Sussex County, New Jersey. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Ocquittunk?
- Lake Ocquittunk in Sussex County, New Jersey has a water quality grade of C (Fair). Water clarity: 4.1 ft visibility. Phosphorus: 23.2 µg/L. Chlorophyll-a (algae): 13 µg/L.
Is Lake Ocquittunk safe to swim in?
- Generally safe for swimming, moderate water quality. Lake Ocquittunk has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 13 µg/L. Always check local health department advisories before swimming.
Explore Lake Ocquittunk across LakeGrade
More New Jersey Lake Rankings
Other Grade C Lakes in New Jersey
Eutrophic Lakes in New Jersey
Where this data comes from
45 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM45 samples · 2022
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (3)
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