Hardesty Lake Center
Hardesty Lake Center in Putnam County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.3 ft visibility. Phosphorus: 53 µg/L.
- Clarity
- 2.3 ft
- Typical in July
- 80°F
- Max depth
- ~38 ft est.
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Why Hardesty Lake Center 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 Hardesty Lake Center, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not 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.
Hardesty Lake Center is a lake in Putnam County, Florida with an estimated average depth of about 38 feet.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2020-12-14. Grade methodology: LakeQuality methodology.
Watch Hardesty Lake Center water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Hardesty Lake Center
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2.3 ft of visibility. Phosphorus level: 53 µg/L. Trophic State Index: 63.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2.3 ft | Not graded |
| Phosphorus | 53 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 63 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Hardesty Lake Center
Compare lakeside cabins, hotels, and vacation rentals near Hardesty Lake Center in Putnam 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 Hardesty Lake Center
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
Hardesty Lake Center typically sits around 80°F at the surface in July. Summer average is about 80°F. Usually warmest in Jul (about 80°F) and coldest in Jan (about 57°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 29 field readings (2017–2020) via the EPA Water Quality Portal. See the full Hardesty Lake Center water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~38 ft est. |
| Average Depth | ~7 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Florida has not published bathymetry for Hardesty Lake Center.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Hardesty Lake Center
EPA Impairment Status
Hardesty Lake Center is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4C).
Causes of impairment
Source: EPA ATTAINS assessment unit FL2716X · Official waterbody report · Matched by proximity (0.03 km)
Graded lakes near Hardesty Lake Center
Hardesty Lake Center has no grade, but these lakes within a short drive do.
Nearby Lakes in Putnam County
Frequently asked questions about Hardesty Lake Center
Where is Hardesty Lake Center?
- Hardesty Lake Center is a lake in Putnam 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 Hardesty Lake Center?
- Hardesty Lake Center in Putnam County, Florida is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2.3 ft visibility. Phosphorus: 53 µg/L.
Is Hardesty Lake Center safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Hardesty Lake Center is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
What is the water temperature of Hardesty Lake Center?
- Hardesty Lake Center typically sits around 80°F at the surface in July, from 29 EPA Water Quality Portal field readings (2017–2020). That is a typical value for the month, not a live reading.
How deep is Hardesty Lake Center?
- No published bathymetric survey covers Hardesty Lake Center, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Hardesty Lake Center across LakeQuality
Planning a trip around Fort Matanzas?
Hardesty Lake Center is about 38 miles from Fort Matanzas National Monument. 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 Fort Matanzas →More Florida Lake Rankings
Other Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
9 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FL Dept. of Environmental Protection, Northeast District
21FLA_WQX9 samples · 2020
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
Lake size & watershed from HydroLAKES (HydroSHEDS)