Alachua-Moss Lake
Alachua-Moss Lake in Putnam County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 19.5 µg/L.
- Clarity
- 3.9 ft
- Typical in May
- 68°F
- Max depth
- ~47 ft est.
- Type
- Eutrophic
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Alachua-Moss Lake is a productive, nutrient-rich eutrophic lake in Putnam County, Florida with an estimated average depth of about 47 feet. Water quality is graded B based on 1 sampling years through 2020. Compared to the 27 other monitored lakes in Putnam County, Alachua-Moss Lake ranks #11 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2020-08-28. 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 3.9 ft. Phosphorus level: 19.5 µg/L. Trophic State Index: 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.9 ft | Not graded |
| Phosphorus | 19.5 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 Alachua-Moss Lake
Compare lakeside cabins, hotels, and vacation rentals near Alachua-Moss Lake 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.
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Water Temperature
Alachua-Moss Lake typically sits around 68°F at the surface in May. Usually warmest in Apr (about 78°F) and coldest in Feb (about 60°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 12 field readings (2011–2018) via the EPA Water Quality Portal. See the full Alachua-Moss Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~47 ft est. |
| Average Depth | ~9 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 Alachua-Moss Lake.
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 Alachua-Moss Lake
EPA Impairment Status
Alachua-Moss Lake 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 FL2713A · Official waterbody report · Matched by proximity (0.14 km)
County Ranking
Ranked #11 of 28 lakes in Putnam County
Nearby Lakes in Putnam County
Frequently asked questions about Alachua-Moss Lake
Where is Alachua-Moss Lake?
- Alachua-Moss Lake is a lake in Putnam County, Florida. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Alachua-Moss Lake?
- Alachua-Moss Lake in Putnam County, Florida has a water quality grade of B (Good). Water clarity: 3.9 ft visibility. Phosphorus: 19.5 µg/L.
Is Alachua-Moss Lake safe to swim in?
- Good for swimming, clear water with low algae levels. Alachua-Moss Lake has a water quality grade of B (Good). Always check local health department advisories before swimming.
What is the water temperature of Alachua-Moss Lake?
- Alachua-Moss Lake typically sits around 68°F at the surface in May, from 12 EPA Water Quality Portal field readings (2011–2018). That is a typical value for the month, not a live reading.
How deep is Alachua-Moss Lake?
- No published bathymetric survey covers Alachua-Moss Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 47 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Alachua-Moss Lake across LakeQuality
More Florida Lake Rankings
Other Grade B Lakes in Florida
Eutrophic Lakes in Florida
Where this data comes from
12 measurements from 3 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX12 samples · 2020
Monitoring station identifiers (3)
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)