St John'S Lake
Volusia County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for St John'S Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
- Public access
St John'S Lake in Volusia County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 102 µg/L.
St John'S Lake is a highly nutrient-loaded hypereutrophic lake in Volusia County, Florida. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 29 other monitored lakes in Volusia County, St John'S Lake ranks #30 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2024-12-02. Methodology: how these readings are compared.
What St John'S Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch2 documented ramps
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. St John'S Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen), salinity / chlorides. Check local advisories before you swim.
Whether St John'S 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 St John'S Lake
These are the measurements Florida DEP publishes for St John'S Lake, 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 102 µg/L. TSI 71.
| 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 | 102µg/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. | 71 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about St John'S Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
St John'S Lake typically sits around 77°F at the surface in October. Summer average is about 86°F. Usually warmest in Jul (about 88°F) and coldest in Jan (about 62°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (62°F) to its warmest (88°F).
Typical surface water temperature by month, from 50 field readings (2010–2025) via the EPA Water Quality Portal. See the full St John'S Lake water temperature breakdown →
Recreation & Access
- Cameron Wight Park Boat RampPublic
- Lemon Bluff 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 St John'S Lake
Compare lakeside cabins, hotels, and vacation rentals near St John'S Lake in Volusia 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 St John'S Lake are listed below.
Top-rated places to stay near St John'S Lake
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 →
Follow St John'S Lake’s readings
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Fishing St John'S Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable4 years
Phosphorus
Worsening+6.85 µg/L/yr5 years
EPA Impairment Status
St John'S Lake 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 FL2981A · Official waterbody report
Nearby Lakes in Volusia County
Frequently asked questions about St John'S Lake
Where is St John'S Lake?
- St John'S Lake is a lake in Volusia County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of St John'S Lake?
- St John'S Lake in Volusia County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 102 µg/L.
Is St John'S Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. St John'S Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen), salinity / chlorides. Check local advisories before you swim.
What is the water temperature of St John'S Lake?
- St John'S Lake typically sits around 77°F at the surface in October, from 50 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Are there boat ramps on St John'S Lake?
- St John'S Lake has 2 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Cameron Wight Park Boat Ramp, Lemon Bluff Public Boat Ramp. Public access is listed as yes.
Can I fish at St John'S Lake?
- St John'S Lake has 2 documented boat landings 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 St John'S Lake across LakeQuality
Planning a trip around Canaveral?
St John'S Lake is about 26 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
Hypereutrophic Lakes in Florida
Where this data comes from
19 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 samples19 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
Named boat-access points from the USGS National Boat Ramps inventory