Indian Mills Lake
Indian Mills Lake in Burlington County, New Jersey has a water quality grade of C (Fair). Water clarity: 1.6 ft visibility. Phosphorus: 56.8 µg/L. Chlorophyll-a (algae): 24.1 µg/L. Surface area: 40 acres.
- Clarity
- 1.6 ft
- Area
- 40 acres
- Type
- Eutrophic
Indian Mills Lake is a 40-acre productive, nutrient-rich eutrophic lake in Burlington County, New Jersey. Water quality is graded C based on 2 sampling years through 2021. Compared to the 11 other monitored lakes in Burlington County, Indian Mills Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2021-10-12. Grade methodology: LakeGrade methodology.
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Swimming Safety
Grade onlyAlgae risk
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)
Very murky, less than 1.6 ft of visibility. Phosphorus level: 56.8 µg/L. Chlorophyll-a: 24.1 µg/L. Trophic State Index: 65.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1.6 ft | Not graded |
| Phosphorus | 56.8 µg/L | Fair |
| Chlorophyll-a (Algae) | 24.1 µg/L | Fair |
| Trophic State Index (TSI) | 65 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Indian Mills Lake
Compare lakeside cabins, hotels, and vacation rentals near Indian Mills Lake in Burlington 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 Indian Mills Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 40 acres |
No bathymetric survey has been published for Indian Mills Lake, so its depth is not documented here.
Fishing Indian Mills Lake
Reservoir Info (USACE NID)
Indian Mills Lake is a man-made reservoir impounded by the Indian Mills Dam (completed 1807), built primarily for recreation on the Muskingum Brook; earth-type dam, 11 ft tall and 600 ft long.
- Surface area
- 40 ac
- Normal storage
- 160 ac-ft
- Max storage
- 267 ac-ft
- Drainage area
- 5.8 sq mi
- Hazard class
- Significant
- Owner
- Township of Shamong
Source: USACE National Inventory of Dams, NID ID NJ00042 · Operator website
EPA Impairment Status
Indian Mills Lake 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 NJ02040301150030-01 · Official waterbody report · Matched by proximity (2.54 km)
County Ranking
Ranked #6 of 12 lakes in Burlington County
Nearby Lakes in Burlington County
Frequently asked questions about Indian Mills Lake
Where is Indian Mills Lake?
- Indian Mills Lake is a lake in Burlington 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 Indian Mills Lake?
- Indian Mills Lake in Burlington County, New Jersey has a water quality grade of C (Fair). Water clarity: 1.6 ft visibility. Phosphorus: 56.8 µg/L. Chlorophyll-a (algae): 24.1 µg/L. Surface area: 40 acres.
Is Indian Mills Lake safe to swim in?
- Swim with caution, moderate algae may be present. Indian Mills Lake has a water quality grade of C (Fair). Algae concentration (chlorophyll-a) is 24.1 µg/L. Always check local health department advisories before swimming.
Explore Indian Mills 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
51 measurements from 2 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_BFBM51 samples · 2020–2021
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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