Little Washoe Outfall Lake
Washoe County, Nevada45 acresView mapDirections
NDEP publishes the water-quality measurements for Little Washoe Outfall Lake. Here is what has been measured.
- Limited data
Little Washoe Outfall Lake in Washoe County, Nevada has water-quality measurements published by NDEP, shown here as reported. Phosphorus: 820 µg/L. Surface area: 45 acres.
Little Washoe Outfall Lake is a 45-acre lake in Washoe County, Nevada.
Source: EPA Water Quality Portal sampling records, NDEP, last sampled 2018-09-12. 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 Little Washoe Outfall Lake is safe to swim in today is a call for the Nevada Division of Environmental Protection and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Little Washoe Outfall Lake
These are the measurements NDEP publishes for Little Washoe Outfall 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 820 µg/L. TSI 101.
| 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 | 820µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| 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. | 101 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Little Washoe Outfall Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
45 acres
No bathymetric survey has been published for Little Washoe Outfall Lake, so its depth is not documented here.
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Fishing Little Washoe Outfall Lake
Reservoir Info (USACE NID)
Little Washoe Outfall Lake is a man-made reservoir impounded by the Washoe Lake Dam, built primarily for irrigation on the Steamboat Creek; masonry-type dam, 12 ft tall and 30 ft long.
- Surface area
- 45 ac
- Normal storage
- 300 ac-ft
- Max storage
- 400 ac-ft
- Drainage area
- 83.8 sq mi
- Hazard class
- High
- Owner
- WASHOE LK RES & GALENA CK DITCH CO
All listed purposes: Irrigation;Recreation.
Source: USACE National Inventory of Dams, NID ID NV10472 · Operator website · Matched by proximity (0.02 km)
Nearby Lakes in Washoe County
Frequently asked questions about Little Washoe Outfall Lake
Where is Little Washoe Outfall Lake?
- Little Washoe Outfall Lake is a lake in Washoe County, Nevada. Its water-quality measurements are published by NDEP and shown on this page as reported.
What is the water quality of Little Washoe Outfall Lake?
- Little Washoe Outfall Lake in Washoe County, Nevada has water-quality measurements published by NDEP, shown here as reported. Phosphorus: 820 µg/L. Surface area: 45 acres.
Is Little Washoe Outfall Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Little Washoe Outfall Lake across LakeQuality
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Where this data comes from
2 measurements from 1 monitoring station, 2014–2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Nevada Division of Environmental Protection
21NEV1_WQX2 samples · 2014–2018
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 4500 P E ~ Phosphorus by Ascorbic Acid
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.