Gap Lake
Washington County, FloridaView mapDirections
Florida DEP publishes the water-quality measurements for Gap Lake. Here is what has been measured.
- Impaired · Mercury
- Public access
- Limited data
Gap Lake in Washington County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 13.8 ft visibility. Phosphorus: 4 µg/L.
Gap Lake is a lake in Washington County, Florida. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2023-07-25. Methodology: how these readings are compared.
Gap Lake has one public boat landing. Vrbo is where to look for cabins and lake homes around Gap Lake, and Booking.com and Expedia search hotels near the lake for your dates.
What Gap Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13.8 ft of visibility
- Boat launch1 documented ramp
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Gap Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Gap 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 Gap Lake
These are the measurements Florida DEP publishes for Gap Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13.8 ft. Phosphorus 4 µg/L. TSI 32.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13.8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 4µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 32 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about Gap Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- Griffin Landing (North)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Gap Lake
Compare lakeside cabins, hotels, and vacation rentals near Gap Lake in Washington 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 Gap Lake
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Fishing Gap Lake
Water quality readings over time
3 seasons of samples on record (2020–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Phosphorus
Improving-0.29 µg/L/yr3 years
EPA Impairment Status
Gap 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: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit FL555 · Official waterbody report
Nearby Lakes in Washington County
Frequently asked questions about Gap Lake
Where is Gap Lake?
- Gap Lake is a lake in Washington County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Gap Lake?
- Gap Lake in Washington County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Water clarity: 13.8 ft visibility. Phosphorus: 4 µg/L.
Is Gap Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Gap Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Are there boat ramps on Gap Lake?
- Gap Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Griffin Landing (North). Public access is listed as yes.
Can I fish at Gap Lake?
- Gap Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Florida's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
4 measurements from 1 monitoring station, 2020–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Submitting organization not recorded for these samples4 samples · 2020–2023
Monitoring station identifiers (1)
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
Named boat-access points from the USGS National Boat Ramps inventory