Hammonton Lake
Hammonton Lake in Atlantic County, New Jersey has a water quality grade of C (Fair). Water clarity: 5.2 ft visibility. Phosphorus: 34.2 µg/L. Chlorophyll-a (algae): 26.2 µg/L. Surface area: 71 acres.
- Clarity
- 5.2 ft
- Area
- 71 acres
- Type
- Eutrophic
Hammonton Lake is a 71-acre productive, nutrient-rich eutrophic lake in Atlantic County, New Jersey. Water quality is graded C based on 2 sampling years through 2021. Compared to the 5 other monitored lakes in Atlantic County, Hammonton Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-13. 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.
Swim with caution, moderate algae may be present
Water Quality Grade: C (Fair)
Murky, only visible to about 5.2 ft. Phosphorus level: 34.2 µg/L. Chlorophyll-a: 26.2 µg/L. Trophic State Index: 57.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.2 ft | Not graded |
| Phosphorus | 34.2 µg/L | Good |
| Chlorophyll-a (Algae) | 26.2 µg/L | Fair |
| Trophic State Index (TSI) | 57 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hammonton Lake
Compare lakeside cabins, hotels, and vacation rentals near Hammonton Lake in Atlantic 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 Hammonton Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 71 acres |
No bathymetric survey has been published for Hammonton Lake, so its depth is not documented here.
Fishing Hammonton Lake
Reservoir Info (USACE NID)
Hammonton Lake is a man-made reservoir impounded by the Hammonton Lake Dam (completed 1902), built primarily for recreation on the Hammonton Creek; earth-type dam, 13 ft tall and 325 ft long.
- Surface area
- 71 ac
- Normal storage
- 426 ac-ft
- Drainage area
- 2.7 sq mi
- Hazard class
- Significant
- Owner
- NJDOT
Source: USACE National Inventory of Dams, NID ID NJ00476 · Operator website
EPA Impairment Status
Hammonton 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 NJ02040301170010-01 · Official waterbody report · Matched by proximity (1.62 km)
County Ranking
Ranked #5 of 6 lakes in Atlantic County
Nearby Lakes in Atlantic County
Frequently asked questions about Hammonton Lake
Where is Hammonton Lake?
- Hammonton Lake is a lake in Atlantic 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 Hammonton Lake?
- Hammonton Lake in Atlantic County, New Jersey has a water quality grade of C (Fair). Water clarity: 5.2 ft visibility. Phosphorus: 34.2 µg/L. Chlorophyll-a (algae): 26.2 µg/L. Surface area: 71 acres.
Is Hammonton Lake safe to swim in?
- Swim with caution, moderate algae may be present. Hammonton Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 26.2 µg/L. Always check local health department advisories before swimming.
Explore Hammonton Lake across LakeGrade
More New Jersey Lake Rankings
Other Grade C Lakes in New Jersey
Eutrophic Lakes in New Jersey
Where this data comes from
85 measurements from 3 monitoring stations, 2020–2021. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- NJDEP Bureau of Freshwater and Biological Monitoring
NJDEP_BFBM85 samples · 2020–2021
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