Goose Creek Reservoir
Loudoun County, Virginia120 acresView mapDirections
Virginia DEQ publishes the water-quality measurements for Goose Creek Reservoir. Here is what has been measured.
- Mesotrophic
Goose Creek Reservoir in Loudoun County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 65 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Surface area: 120 acres.
Goose Creek Reservoir is a 120-acre mesotrophic lake in Loudoun County, Virginia. Compared to the 2 other monitored lakes in Loudoun County, Goose Creek Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2026-06-25. Methodology: how these readings are compared.
Goose Creek Reservoir covers about 120 acres in Loudoun County. Vrbo is where to look for cabins and lake homes around Goose Creek Reservoir, and Booking.com and Expedia search hotels near the lake for your dates.
Swimming conditions
Readings onlyLow algae
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 Goose Creek Reservoir is safe to swim in today is a call for the Virginia Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Goose Creek Reservoir
These are the measurements Virginia DEQ publishes for Goose Creek Reservoir, 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 65 µg/L. Chlorophyll-a 2.1 µg/L. TSI 56.
| 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 | 65µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 2.1µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 56 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Goose Creek Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
120 acres
No bathymetric survey has been published for Goose Creek Reservoir, so its depth is not documented here.
Stays via Stay22
Stays near Goose Creek Reservoir
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Fishing Goose Creek Reservoir
Water Quality Trend: Stable
Based on 4 years of monitoring (2015–2026).
Water clarity
Stable4 years
Phosphorus
Stable+0.88 µg/L/yr3 years
Chlorophyll-a
Stable-0.03 µg/L/yr3 years
Reservoir Info (USACE NID)
Goose Creek Reservoir is a man-made reservoir impounded by the Goose Creek Dam, built primarily for water supply on the Goose Creek; gravity-type dam, 39 ft tall and 715 ft long.
- Surface area
- 120 ac
- Normal storage
- 613 ac-ft
- Max storage
- 4,373 ac-ft
- Drainage area
- 347 sq mi
- Hazard class
- High
- Owner
- Loudoun Water
Source: USACE National Inventory of Dams, NID ID VA107003 · Operator website
Nearby Lakes in Loudoun County
Frequently asked questions about Goose Creek Reservoir
Where is Goose Creek Reservoir?
- Goose Creek Reservoir is a lake in Loudoun County, Virginia. Its water-quality measurements are published by Virginia DEQ and shown on this page as reported.
What is the water quality of Goose Creek Reservoir?
- Goose Creek Reservoir in Loudoun County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 2.1 ft visibility. Phosphorus: 65 µg/L. Chlorophyll-a (algae): 2.1 µg/L. Surface area: 120 acres.
Is Goose Creek Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Goose Creek Reservoir across LakeQuality
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Mesotrophic Lakes in Virginia
Where this data comes from
160 measurements from 2 monitoring stations, 2015–2026. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY
21VASWCB160 samples · 2015–2026
Analytical methods
- Tyler, John. 1968. The secchi disk, Limnology and Oceanograpy, 13(1):1-6.
- Total Phosphorus After Block Digestion
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- 446.0 ~ EPA; Chlorophylls and Pheopigments in Phytoplankton by Spectrophotometry
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (2)
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.