Mary Jane Lake
Orange County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Mary Jane Lake. Here is what has been measured.
- Eutrophic
- Impaired · Mercury
- Public access
Mary Jane Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 28.5 µg/L.
Mary Jane Lake is a productive, nutrient-rich eutrophic lake in Orange 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 319 other monitored lakes in Orange County, Mary Jane Lake ranks #101 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-12-02. Methodology: how these readings are compared.
What Mary Jane Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyBacteria tested: low
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.
Based on E. coli testing, Mary Jane Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 28 samples across 7 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Florida’s current beach and health-department advisories before swimming.
Whether Mary Jane Lake 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 Mary Jane Lake
These are the measurements Florida DEP publishes for Mary Jane Lake, 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 1.6 ft of visibility. Phosphorus 28.5 µg/L. TSI 61.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 28.5µg/L | Good 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. | 61 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Mary Jane Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Mary Jane Lake typically sits around 80°F at the surface in October. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Jan (about 59°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (59°F) to its warmest (87°F).
Typical surface water temperature by month, from 66 field readings (2010–2024) via the EPA Water Quality Portal. See the full Mary Jane Lake water temperature breakdown →
Recreation & Access
- Moss Park EastPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Mary Jane Lake
Compare lakeside cabins, hotels, and vacation rentals near Mary Jane Lake in Orange 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.
Top-rated places to stay near Mary Jane Lake
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Fishing Mary Jane Lake
Water Quality Trend: Stable
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Worsening+3.25 µg/L/yr5 years
EPA Impairment Status
Mary Jane Lake 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: Aquatic life, Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL3171A · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Mary Jane Lake under Clean Water Act (NPDES) discharge permits.
- Orlando AirportOrlando · 2.2 mi away · NPDES FLG110905
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 Orange County
Frequently asked questions about Mary Jane Lake
Where is Mary Jane Lake?
- Mary Jane Lake is a lake in Orange County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Mary Jane Lake?
- Mary Jane Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.6 ft visibility. Phosphorus: 28.5 µg/L.
Is Mary Jane Lake safe to swim in?
- Based on E. coli testing, Mary Jane Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 28 samples across 7 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Mary Jane Lake is safe to swim in today is a call for Florida's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Mary Jane Lake?
- Mary Jane Lake typically sits around 80°F at the surface in October, from 66 EPA Water Quality Portal field readings (2010–2024). That is a typical value for the month, not a live reading.
Are there boat ramps on Mary Jane Lake?
- Mary Jane Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Moss Park East. Public access is listed as yes.
Can I fish at Mary Jane Lake?
- Mary Jane Lake 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 Mary Jane Lake across LakeQuality
Planning a trip around Canaveral?
Mary Jane Lake is about 38 miles from Canaveral National Seashore. 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 Canaveral →More lakes in Florida
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
57 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples57 samples · 2020–2024
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