Mid Lake Deep
Morris County, New JerseyView mapDirections
NJDEP publishes the water-quality measurements for Mid Lake Deep. Here is what has been measured.
- Hypereutrophic
- Impaired · Impaired biota (cause unknown)
- Limited data
Mid Lake Deep in Morris County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Phosphorus: 110 µg/L.
Mid Lake Deep is a highly nutrient-loaded hypereutrophic lake in Morris County, New Jersey. 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. Methodology: how these readings are compared.
Swimming conditions
Readings onlyBacteria advisory
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Mid Lake Deep is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), salinity / chlorides, turbidity. Check local advisories before you swim.
Whether Mid Lake Deep is safe to swim in today is a call for the New Jersey Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Mid Lake Deep
These are the measurements NJDEP publishes for Mid Lake Deep, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 110 µg/L. TSI 72.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 110µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 72 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Mid Lake Deep
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Mid Lake Deep are listed below.
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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
Designated uses not supporting: Drinking water, Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit NJ02030103010150-01 · Official waterbody report
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. Its water-quality measurements are published by NJDEP and shown on this page as reported.
What is the water quality of Mid Lake Deep?
- Mid Lake Deep in Morris County, New Jersey has water-quality measurements published by NJDEP, shown here as reported. Phosphorus: 110 µg/L.
Is Mid Lake Deep safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Mid Lake Deep is listed impaired under Clean Water Act §303(d) (IR 5) for impaired biota (cause unknown), metals (other than mercury), nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal), salinity / chlorides, turbidity. Check local advisories before you swim.
Explore Mid Lake Deep across LakeQuality
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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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database