Greenbelt Lake
Donley County, Texas2,020 acresView mapDirections
TCEQ publishes the water-quality measurements for Greenbelt Lake. Here is what has been measured.
- Impaired · Algal growth
- 60 ft max depth
- Public access
- Limited data
Greenbelt Lake in Donley County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 17.9 µg/L. Surface area: 2020 acres.
Greenbelt Lake is a 2,020-acre lake in Donley County, Texas with an estimated average depth of about 60 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 4 public boat landings.
Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2024-12-10. Methodology: how these readings are compared.
What Greenbelt Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch4 documented ramps
- Big water2,020 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Greenbelt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
Whether Greenbelt Lake is safe to swim in today is a call for the Texas Commission on Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Greenbelt Lake
These are the measurements TCEQ publishes for Greenbelt 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 2.1 ft of visibility. Phosphorus 30 µg/L. Chlorophyll-a 17.9 µg/L. TSI 59.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 30µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 17.9µg/L | Measured, not scored 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. | 59 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Greenbelt Lake
Answers come straight from the public measurements and survey records on this page.
→ Greenbelt Lake water level: the live USGS gauge reading
Lake Details
Max depth
~60 ft est.
Surface area
2,020 acres
Public access
Yes
Listed by TCEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Texas has not published bathymetry for Greenbelt Lake.
Lake Size & Watershed
Watershed (drainage) area
334 sq mi
HydroLAKES / HydroSHEDS
Shoreline
9.4 mi
HydroLAKES / HydroSHEDS
Elevation
2,644 ft
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
- North Shore CampgroundPublic
- Lakeside MarinaPublic
- Kincaid Park CampgroundPublic
- Kelly Creek SouthPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Greenbelt Lake
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Fishing Greenbelt Lake
Water Quality Trend: Worsening
Based on 5 years of monitoring (2020–2024).
Water clarity
Worsening4 years
Phosphorus
Worsening+20 µg/L/yr2 years
Chlorophyll-a
Worsening+0.6 µg/L/yr2 years
Reservoir Info (USACE NID)
Greenbelt Lake is a man-made reservoir impounded by the Greenbelt Dam (completed 1968), built primarily for water supply on the Salt Fork Red River; earth-type dam, 111 ft tall and 8,300 ft long.
- Surface area
- 2,020 ac
- Normal storage
- 59,800 ac-ft
- Max storage
- 100,500 ac-ft
- Drainage area
- 266 sq mi
- Hazard class
- High
- Owner
- GREENBELT MUNICIPAL & INDUSTRIAL WATER AUTHORITY
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID TX03698 · Operator website
EPA Impairment Status
Greenbelt Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Other.
Source: EPA ATTAINS assessment unit TX-0223_01 · Official waterbody report
Nearby Lakes in Donley County
Frequently asked questions about Greenbelt Lake
Where is Greenbelt Lake?
- Greenbelt Lake is a lake in Donley County, Texas. Its water-quality measurements are published by TCEQ and shown on this page as reported.
What is the water quality of Greenbelt Lake?
- Greenbelt Lake in Donley County, Texas has water-quality measurements published by TCEQ, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 17.9 µg/L. Surface area: 2020 acres.
Is Greenbelt Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Greenbelt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth. Check local advisories before you swim.
How deep is Greenbelt Lake?
- No published bathymetric survey covers Greenbelt Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 60 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 2020 acres.
Are there boat ramps on Greenbelt Lake?
- Greenbelt Lake has 4 documented boat landings in the USGS National Boat Ramps inventory. Named access points include North Shore Campground, Lakeside Marina, Kincaid Park Campground, Kelly Creek South. Public access is listed as yes.
Can I fish at Greenbelt Lake?
- Greenbelt Lake has 4 documented boat landings in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Texas's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
38 measurements from 4 monitoring stations, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Texas Commission on Environmental Quality
TCEQMAIN20 samples · 2020–2024 - USGS Texas Water Science Center
USGS-TX18 samples · 2020–2023
Monitoring station identifiers (4)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory