Lake Shannon
Lake Shannon in Orange County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.4 ft visibility.
- Clarity
- 6.4 ft
- Typical in August
- 86°F
- Trend
- ↓ Declining
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Why Lake Shannon has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Shannon, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by FDEP and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Shannon is a lake in Orange County, Florida. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2021-06-02. Grade methodology: LakeQuality methodology.
Watch Lake Shannon water quality
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Swimming Safety
Not ratedBacteria A
Based on E. coli testing, Lake Shannon never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 8 samples across 2 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.
Water quality measurements for Lake Shannon
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 6.4 ft. Trophic State Index: 50.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 6.4 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 50 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Lake Shannon
Compare lakeside cabins, hotels, and vacation rentals near Lake Shannon 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 Lake Shannon
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 →
Water Temperature
Lake Shannon typically sits around 86°F at the surface in August. Summer average is about 82°F. Usually warmest in Aug (about 86°F) and coldest in Mar (about 65°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 70 field readings (2010–2021) via the EPA Water Quality Portal. See the full Lake Shannon water temperature breakdown →
Fishing Lake Shannon
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.057 m/yr | 6 |
| Phosphorus | → Stable | +0.17 µg/L/yr | 6 |
EPA Impairment Status
Lake Shannon is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit FL3168W2 · Official waterbody report · Matched by proximity (0.93 km)
Graded lakes near Lake Shannon
Lake Shannon has no grade, but these lakes within a short drive do.
Nearby Lakes in Orange County
Frequently asked questions about Lake Shannon
Where is Lake Shannon?
- Lake Shannon is a lake in Orange County, Florida. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lake Shannon?
- Lake Shannon in Orange County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 6.4 ft visibility.
Is Lake Shannon safe to swim in?
- Based on E. coli testing, Lake Shannon never exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 0% of 8 samples across 2 seasons. That works out to a bacteria swim-safety grade of A — a historical summary of past testing, not a current reading. Lake Shannon is not rated for water quality — its monitoring record does not meet the evidence bar. Bacteria levels can spike quickly after heavy rain, so always check Florida's current beach and health-department advisories before you swim.
What is the water temperature of Lake Shannon?
- Lake Shannon typically sits around 86°F at the surface in August, from 70 EPA Water Quality Portal field readings (2010–2021). That is a typical value for the month, not a live reading.
Explore Lake Shannon across LakeQuality
Planning a trip around Canaveral?
Lake Shannon is about 39 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 Florida Lake Rankings
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
1 measurement from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples1 sample · 2021
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database