Clay-Ryan Lake
Clay County, Florida6 acresView mapDirections
Florida DEP publishes the water-quality measurements for Clay-Ryan Lake. Here is what has been measured.
- Mesotrophic
- Public access
- Limited data
Clay-Ryan Lake in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 23 µg/L. Surface area: 6 acres.
Clay-Ryan Lake is a 6-acre mesotrophic lake in Clay County, Florida. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 16 other monitored lakes in Clay County, Clay-Ryan Lake ranks #10 for water quality.
Source: EPA Water Quality Portal sampling records, FDEP, last sampled 2022-07-26. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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. Check local advisories before you swim.
Whether Clay-Ryan 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 Clay-Ryan Lake
These are the measurements Florida DEP publishes for Clay-Ryan Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 23 µg/L. TSI 49.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 23µg/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 Clay-Ryan Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
6 acres
Public access
Yes
Listed by Florida DEP
No bathymetric survey has been published for Clay-Ryan Lake, so its depth is not documented here.
Stays via Stay22
Stays near Clay-Ryan Lake
Compare lakeside cabins, hotels, and vacation rentals near Clay-Ryan Lake in Clay 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 Clay-Ryan Lake
Prices for Oct 9–11, 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 Clay-Ryan Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Clay-Ryan Lake
Water quality readings over time
3 seasons of samples on record (2022–2024). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving3 years
Phosphorus
Improving-1.75 µg/L/yr3 years
Reservoir Info (USACE NID)
Clay-Ryan Lake is a man-made reservoir impounded by the Lake Ryan Dam (completed 1969), built primarily for recreation on the Tr-Black Creek; earth-type dam, 29 ft tall and 250 ft long.
- Surface area
- 6 ac
- Normal storage
- 42 ac-ft
- Max storage
- 81 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- High
- Owner
- LAKE ASBURY MUNICIPAL SERVICES BENEFIT DISTRICT (LAMSBD)
All listed purposes: Recreation;Other.
Source: USACE National Inventory of Dams, NID ID FL00151 · Operator website · Matched by proximity (0.12 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Clay-Ryan Lake under Clean Water Act (NPDES) discharge permits.
- Middleburg Bluffs WwtfMiddleburg · 4.1 mi away · NPDES FL0113743
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Clay County
Frequently asked questions about Clay-Ryan Lake
Where is Clay-Ryan Lake?
- Clay-Ryan Lake is a lake in Clay County, Florida. Its water-quality measurements are published by Florida DEP and shown on this page as reported.
What is the water quality of Clay-Ryan Lake?
- Clay-Ryan Lake in Clay County, Florida has water-quality measurements published by Florida DEP, shown here as reported. Phosphorus: 23 µg/L. Surface area: 6 acres.
Is Clay-Ryan Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at Clay-Ryan Lake?
- Public access to Clay-Ryan Lake is listed as yes on the lake record. 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.
Explore Clay-Ryan Lake across LakeQuality
Planning a trip around Castillo de San Marcos?
Clay-Ryan Lake is about 33 miles from Castillo de San Marcos 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 Castillo de San Marcos →More lakes in Florida
Other Lakes in Florida
Mesotrophic Lakes in Florida
Where this data comes from
9 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- FLORIDA LAKEWATCH
21FLKWAT_WQX9 samples · 2022
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)