Mid Lake Deep
Mid Lake Deep in Morris County, New Jersey has a water quality grade of D (Nutrient-rich). Phosphorus: 110 µg/L.
- Type
- Hypereutrophic
Grade D measures nutrients and algae, not whether this is a good place for a cabin trip. Cabins and rentals near Mid Lake Deep →
Mid Lake Deep is a highly nutrient-loaded hypereutrophic lake in Morris County, New Jersey. Water quality is graded D based on 1 sampling years through 2026. Compared to the 11 other monitored lakes in Morris County, Mid Lake Deep ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-07-08. 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)
No clarity data. Phosphorus level: 110 µg/L. Trophic State Index: 72.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 110 µg/L | Poor |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 72 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Mid Lake Deep
Compare lakeside cabins, hotels, and vacation rentals near Mid Lake Deep in Morris 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 Mid Lake Deep are listed below.
Top-rated places to stay near Mid Lake Deep
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Fishing Mid Lake Deep
EPA Impairment Status
Mid Lake Deep 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 NJ02030103010150-01 · Official waterbody report · Matched by proximity (1.25 km)
County Ranking
Ranked #10 of 12 lakes in Morris County
Nearby Lakes in Morris County
Frequently asked questions about Mid Lake Deep
Where is Mid Lake Deep?
- Mid Lake Deep is a lake in Morris 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 Mid Lake Deep?
- Mid Lake Deep in Morris County, New Jersey has a water quality grade of D (Nutrient-rich). Phosphorus: 110 µg/L.
Is Mid Lake Deep safe to swim in?
- Nutrients and algae run higher than average — check local advisories before swimming, and skip the water if you see scum. Mid Lake Deep has a water quality grade of D (Nutrient-rich). Always check local health department advisories before swimming.
Explore Mid Lake Deep across LakeGrade
More New Jersey Lake Rankings
Other Grade D Lakes in New Jersey
Hypereutrophic Lakes in New Jersey
Where this data comes from
7 measurements from 1 monitoring station, 2025–2026. Retrieved from the EPA Water Quality Portal on 2026-08-21.
Collected and reported by
- Princeton Hydro LLC
PRINCETONHYDRO7 samples · 2025–2026
Analytical methods
- 4500 P B ~ Phosphorus, sample preparation method
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