Marion-Little Weir Lake
Marion County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Marion-Little Weir Lake. Here is what has been measured.
- Mesotrophic
- Impaired · Algal growth
Marion-Little Weir Lake in Marion County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 12 µg/L.
Marion-Little Weir Lake is a mesotrophic lake in Marion County, Florida. Overall water quality is improving over recent sampling years. Compared to the 17 other monitored lakes in Marion County, Marion-Little Weir Lake ranks #12 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2025-03-08. 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. Marion-Little Weir Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Whether Marion-Little Weir 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 Marion-Little Weir Lake
These are the measurements Florida DEP publishes for Marion-Little Weir Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 4 ft. Phosphorus 12 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 4ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 12µg/L | Good 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. | 49 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Marion-Little Weir Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Marion-Little Weir Lake
Compare lakeside cabins, hotels, and vacation rentals near Marion-Little Weir Lake in Marion 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 Marion-Little Weir Lake
Prices for Oct 16–18, 4 adults. Change dates on the map below.
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 →
Follow Marion-Little Weir Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Marion-Little Weir Lake
Water Quality Trend: Improving
Based on 6 years of monitoring (2020–2025).
Water clarity
Improving6 years
Phosphorus
Improving-1.11 µg/L/yr6 years
EPA Impairment Status
Marion-Little Weir Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Aquatic life, Recreation.
Source: EPA ATTAINS assessment unit FL2790B · Official waterbody report
Nearby Lakes in Marion County
Frequently asked questions about Marion-Little Weir Lake
Where is Marion-Little Weir Lake?
- Marion-Little Weir Lake is a lake in Marion County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Marion-Little Weir Lake?
- Marion-Little Weir Lake in Marion County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 4 ft visibility. Phosphorus: 12 µg/L.
Is Marion-Little Weir Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Marion-Little Weir Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Explore Marion-Little Weir Lake across LakeQuality
More lakes in Florida
Other Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
162 measurements from 3 monitoring stations, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX162 samples · 2022–2025
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