Lake Georgetown
Williamson County, Texas1,310 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- 82 ft max depth
- Public access
- Limited data
Lake Georgetown in Williamson County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.6 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 9.4 µg/L. Surface area: 1310 acres.
- Clarity
- 5.6 ft
- Max depth
- ~82 ft est.
- Area
- 1,310 acres
- Phosphorus
- 20 µg/L
- Chlorophyll-a
- 9.4 µg/L
- Public access
- Yes
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Watch Lake Georgetown’s letter
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Why Lake Georgetown has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Lake Georgetown, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by TCEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lake Georgetown is a 1,310-acre lake in Williamson County, Texas with an estimated average depth of about 82 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2026-05-20. Grade methodology: LakeQuality methodology.
What Lake Georgetown is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
- Big water1,310 acres
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Lake Georgetown
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5.6 ft. Phosphorus 20 µg/L. Chlorophyll-a 9.4 µg/L. TSI 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.6 ft | Not graded |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | 9.4 µg/L | Not graded |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~82 ft est. |
| Surface Area | 1,310 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for Lake Georgetown.
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.
Recreation & Access
- Russell ParkPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Georgetown
Reservoir Info (USACE NID)
Lake Georgetown is a man-made reservoir impounded by the North San Gabriel Dam (completed 1980), built primarily for flood risk reduction on the North Fork San Gabriel River; earth-type dam, 162 ft tall and 6,650 ft long.
- Surface area
- 1,310 ac
- Normal storage
- 37,100 ac-ft
- Max storage
- 236,500 ac-ft
- Drainage area
- 246 sq mi
- Hazard class
- High
- Owner
- USACE - Fort Worth District
All listed purposes: Flood Risk Reduction;Fish and Wildlife Pond;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID TX08006 · Operator website
Graded lakes near Lake Georgetown
Lake Georgetown has no grade, but these lakes within a short drive do.
Nearby Lakes in Williamson County
Frequently asked questions about Lake Georgetown
Where is Lake Georgetown?
- Lake Georgetown is a lake in Williamson County, Texas. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Lake Georgetown?
- Lake Georgetown in Williamson County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.6 ft visibility. Phosphorus: 20 µg/L. Chlorophyll-a (algae): 9.4 µg/L. Surface area: 1310 acres.
Is Lake Georgetown safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lake Georgetown?
- No published bathymetric survey covers Lake Georgetown, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 82 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 1310 acres.
Are there boat ramps on Lake Georgetown?
- Lake Georgetown has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Russell Park. Public access is listed as yes.
Explore Lake Georgetown across LakeQuality
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Where this data comes from
24 measurements from 2 monitoring stations, 2024–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN24 samples · 2024–2026
Monitoring station identifiers (2)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory