Doctor'S Lake @ Mill Cove
Clay County, FloridaView mapDirections
This is the name Florida DEP records for this water. It can describe one sampling location rather than the water as a whole.
Florida DEP publishes the water-quality measurements for Doctor'S Lake @ Mill Cove. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
- Public access
Doctor'S Lake @ Mill Cove in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 86.5 µg/L.
Doctor'S Lake @ Mill Cove is a productive, nutrient-rich eutrophic lake in Clay County, Florida. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 16 other monitored lakes in Clay County, Doctor'S Lake @ Mill Cove ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-09-17. Methodology: how these readings are compared.
What Doctor'S Lake @ Mill Cove is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyRecreation use not supported
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. Doctor'S Lake @ Mill Cove is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Doctor'S Lake @ Mill Cove is safe to swim in today is a call for the Florida Department of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Doctor'S Lake @ Mill Cove
These are the measurements Florida DEP publishes for Doctor'S Lake @ Mill Cove, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.1 ft of visibility. Phosphorus 86.5 µg/L. TSI 67.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 86.5µg/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. | 67 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Doctor'S Lake @ Mill Cove
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Doctor'S Lake @ Mill Cove typically sits around 76°F at the surface in October. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Nov (about 68°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (68°F) to its warmest (87°F).
Typical surface water temperature by month, from 32 field readings (2021–2024) via the EPA Water Quality Portal. See the full Doctor'S Lake @ Mill Cove water temperature breakdown →
Recreation & Access
- Lake Shore Public Boat RampPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Doctor'S Lake @ Mill Cove
Compare lakeside cabins, hotels, and vacation rentals near Doctor'S Lake @ Mill Cove in Clay County, Florida — 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 Doctor'S Lake @ Mill Cove are listed below.
Top-rated places to stay near Doctor'S Lake @ Mill Cove
Prices for Oct 16–18, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Florida’s top lakes →
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Fishing Doctor'S Lake @ Mill Cove
Water Quality Trend: Stable
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Worsening+5.92 µg/L/yr6 years
EPA Impairment Status
Doctor'S Lake @ Mill Cove is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL2389 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Doctor'S Lake @ Mill Cove under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 1 facility has a reported Clean Water Act violation in the past three years.
- Fleming Island Regional WwtfOrange Park · 2.1 mi away · NPDES FL0043834MajorRecent violation
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Clay County
Frequently asked questions about Doctor'S Lake @ Mill Cove
Where is Doctor'S Lake @ Mill Cove?
- Doctor'S Lake @ Mill Cove is in Clay County, Florida. This is the name Florida DEP records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Doctor'S Lake @ Mill Cove?
- Doctor'S Lake @ Mill Cove in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 86.5 µg/L.
Is Doctor'S Lake @ Mill Cove safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Doctor'S Lake @ Mill Cove is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
What is the water temperature of Doctor'S Lake @ Mill Cove?
- Doctor'S Lake @ Mill Cove typically sits around 76°F at the surface in October, from 32 EPA Water Quality Portal field readings (2021–2024). That is a typical value for the month, not a live reading.
Are there boat ramps on Doctor'S Lake @ Mill Cove?
- Doctor'S Lake @ Mill Cove has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Shore Public Boat Ramp. Public access is listed as yes.
Can I fish at Doctor'S Lake @ Mill Cove?
- Doctor'S Lake @ Mill Cove has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Florida's fish and wildlife agency, so check its current regulations before you go.
Explore Doctor'S Lake @ Mill Cove across LakeQuality
Planning a trip around Castillo de San Marcos?
Doctor'S Lake @ Mill Cove is about 29 miles from Castillo de San Marcos National Monument. Crowds there swing hard by season, so the month you pick changes both how busy the park is and what lodging costs.
Best time to visit Castillo de San Marcos →More lakes in Florida
Other Lakes in Florida
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Where this data comes from
46 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FL Dept. of Environmental Protection, Northeast District
21FLA_WQX46 samples · 2021–2024
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory