Alachua-Newnan Lake
Alachua County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Alachua-Newnan Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
Alachua-Newnan Lake in Alachua County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.3 ft visibility. Phosphorus: 198 µg/L.
Alachua-Newnan Lake is a highly nutrient-loaded hypereutrophic lake in Alachua County, Florida. Overall water quality is improving over recent sampling years. Compared to the 30 other monitored lakes in Alachua County, Alachua-Newnan Lake ranks #20 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-25. 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.
Nutrient and algae readings are not a swimming clearance. Alachua-Newnan Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Alachua-Newnan 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 Alachua-Newnan Lake
These are the measurements Florida DEP publishes for Alachua-Newnan 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 1.3 ft of visibility. Phosphorus 198 µg/L. TSI 77.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 198µg/L | Poor 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. | 77 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Alachua-Newnan Lake
Answers come straight from the public measurements and survey records on this page.
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Stays near Alachua-Newnan Lake
Compare lakeside cabins, hotels, and vacation rentals near Alachua-Newnan Lake in Alachua 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Alachua-Newnan Lake are listed below.
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Fishing Alachua-Newnan Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Stable5 years
Phosphorus
Improving-9.1 µg/L/yr5 years
EPA Impairment Status
Alachua-Newnan 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 FL2705B · Official waterbody report
Nearby Lakes in Alachua County
Frequently asked questions about Alachua-Newnan Lake
Where is Alachua-Newnan Lake?
- Alachua-Newnan Lake is a lake in Alachua County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Alachua-Newnan Lake?
- Alachua-Newnan Lake in Alachua County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 1.3 ft visibility. Phosphorus: 198 µg/L.
Is Alachua-Newnan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Alachua-Newnan Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
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Where this data comes from
161 measurements from 3 monitoring stations, 2020–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX161 samples · 2020–2025
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