Roberts Lake
Orange County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Roberts Lake. Here is what has been measured.
- Eutrophic
- Impaired · Algal growth
Roberts Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.6 ft visibility. Phosphorus: 49 µg/L.
Roberts Lake is a productive, nutrient-rich eutrophic lake in Orange County, Florida. Water clarity is improving over recent sampling years. Compared to the 319 other monitored lakes in Orange County, Roberts Lake ranks #272 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-02-26. Methodology: how these readings are compared.
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.
Based on E. coli testing, Roberts Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 31 samples across 8 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 Roberts 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 Roberts Lake
These are the measurements Florida DEP publishes for Roberts 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 2.6 ft of visibility. Phosphorus 49 µg/L. TSI 62.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.6ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 49µg/L | Fair 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. | 62 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Roberts Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Roberts Lake typically sits around 79°F at the surface in October. Summer average is about 86°F. Usually warmest in Jul (about 87°F) and coldest in Dec (about 65°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (65°F) to its warmest (87°F).
Typical surface water temperature by month, from 57 field readings (2010–2025) via the EPA Water Quality Portal. See the full Roberts Lake water temperature breakdown →
Stays via Stay22
Stays near Roberts Lake
Compare lakeside cabins, hotels, and vacation rentals near Roberts 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 Roberts 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 Roberts Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Roberts Lake
Water Quality Trend: Stable
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Worsening+7.75 µg/L/yr5 years
EPA Impairment Status
Roberts 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 FL2872A · Official waterbody report
Nearby Lakes in Orange County
Frequently asked questions about Roberts Lake
Where is Roberts Lake?
- Roberts 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 Roberts Lake?
- Roberts Lake in Orange County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 2.6 ft visibility. Phosphorus: 49 µg/L.
Is Roberts Lake safe to swim in?
- Based on E. coli testing, Roberts Lake never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 31 samples across 8 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 Roberts 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 Roberts Lake?
- Roberts Lake typically sits around 79°F at the surface in October, from 57 EPA Water Quality Portal field readings (2010–2025). That is a typical value for the month, not a live reading.
Explore Roberts Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
93 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples63 samples · 2020–2025
- Submitting organization not recorded for these samples30 samples · 2024–2025
Monitoring station identifiers (3)
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