Lake
Thurston County, Washington270 acresView mapDirections
Washington Ecology publishes the water-quality measurements for Lake. Here is what has been measured.
- Limited data
Lake in Thurston County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Phosphorus: 33 µg/L. Chlorophyll-a (algae): 7.5 µg/L. Surface area: 270 acres.
Lake is a 270-acre lake in Thurston County, Washington. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, WA Ecology, last sampled 2015-06-25. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake is safe to swim in today is a call for the Washington State Department of Ecology and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake
These are the measurements Washington Ecology publishes for 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 33 µg/L. Chlorophyll-a 7.5 µg/L. TSI 52.
| 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 | 33µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 7.5µg/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. | 52 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
270 acres
No bathymetric survey has been published for Lake, so its depth is not documented here.
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Fishing Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2012–2015).
Phosphorus
Improving-2 µg/L/yr4 years
Chlorophyll-a
Improving-0.26 µg/L/yr4 years
Reservoir Info (USACE NID)
Lake is a man-made reservoir impounded by the Deschutes Dam (completed 1951), built primarily for recreation on the Deschutes River; earth-type dam, 45 ft tall.
- Surface area
- 270 ac
- Normal storage
- 3,700 ac-ft
- Max storage
- 4,300 ac-ft
- Drainage area
- 185 sq mi
- Hazard class
- Low
- Owner
- WA DES
Source: USACE National Inventory of Dams, NID ID WA00143 · Operator website · Matched by proximity (0.36 km)
Nearby Lakes in Thurston County
Frequently asked questions about Lake
Where is Lake?
- Lake is a lake in Thurston County, Washington. Its water-quality measurements are published by Washington Ecology and shown on this page as reported.
What is the water quality of Lake?
- Lake in Thurston County, Washington has water-quality measurements published by Washington Ecology, shown here as reported. Phosphorus: 33 µg/L. Chlorophyll-a (algae): 7.5 µg/L. Surface area: 270 acres.
Is Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
40 measurements from 1 monitoring station, 2012–2015. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Thurston County Health Department
THURSTONCOUNTY40 samples · 2012–2015
Analytical methods
- External files contain methodological data
- Fluorometric determination of chlorophyll a in presence of pheophytin
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.