Old Lake Davenport
Old Lake Davenport in Polk County, Florida has a water quality grade of B (Good). Water clarity: 4.3 ft visibility. Phosphorus: 22 µg/L.
- Clarity
- 4.3 ft
- Typical in August
- 90°F
- Type
- Eutrophic
- Trend
- ↓ Declining
- Public access
- Yes
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Old Lake Davenport is a productive, nutrient-rich eutrophic lake in Polk County, Florida. Water quality is graded B based on 1 sampling years through 2023. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 176 other monitored lakes in Polk County, Old Lake Davenport ranks #101 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-09-18. Grade methodology: LakeQuality methodology.
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Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Good for swimming, clear water with low algae levels
Water Quality Grade: B (Good)
Murky, only visible to about 4.3 ft. Phosphorus level: 22 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.3 ft | Not graded |
| Phosphorus | 22 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Old Lake Davenport
Compare lakeside cabins, hotels, and vacation rentals near Old Lake Davenport in Polk 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 Old Lake Davenport
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Water Temperature
Old Lake Davenport typically sits around 90°F at the surface in August. Summer average is about 88°F. Usually warmest in Aug (about 90°F) and coldest in Apr (about 75°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 9 field readings (2016–2023) via the EPA Water Quality Portal. See the full Old Lake Davenport water temperature breakdown →
Recreation & Access
- Polk County Northeast Regional ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Old Lake Davenport
Water Quality Trend: ↓ Declining
Based on 6 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.45 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.91 µg/L/yr | 6 |
County Ranking
Ranked #101 of 177 lakes in Polk County
Nearby Lakes in Polk County
Frequently asked questions about Old Lake Davenport
Where is Old Lake Davenport?
- Old Lake Davenport is a lake in Polk County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Old Lake Davenport?
- Old Lake Davenport in Polk County, Florida has a water quality grade of B (Good). Water clarity: 4.3 ft visibility. Phosphorus: 22 µg/L.
Is Old Lake Davenport safe to swim in?
- Good for swimming, clear water with low algae levels. Old Lake Davenport has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Old Lake Davenport?
- Old Lake Davenport typically sits around 90°F at the surface in August, from 9 EPA Water Quality Portal field readings (2016–2023). That is a typical value for the month, not a live reading.
Are there boat ramps on Old Lake Davenport?
- Old Lake Davenport has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Polk County Northeast Regional Park. Public access is listed as yes.
Explore Old Lake Davenport across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
14 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples14 samples · 2023
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
Named boat-access points from the USGS National Boat Ramps inventory