Sederlin Lake
Carbon County, Wyoming40 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Sederlin Lake. Here is what has been measured.
- Limited data
Sederlin Lake in Carbon County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 50 µg/L. Surface area: 40 acres.
Sederlin Lake is a 40-acre lake in Carbon County, Wyoming. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2014-09-09. 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 Sederlin Lake is safe to swim in today is a call for the Wyoming Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Sederlin Lake
These are the measurements Wyoming DEQ publishes for Sederlin 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 50 µg/L. TSI 61.
| 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 | 50µg/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. | 61 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Sederlin Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
40 acres
No bathymetric survey has been published for Sederlin Lake, so its depth is not documented here.
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Fishing Sederlin Lake
Water quality readings over time
2 seasons of samples on record (2013–2014). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Worsening+20 µg/L/yr2 years
Reservoir Info (USACE NID)
Sederlin Lake is a man-made reservoir impounded by the Sederlin (completed 1910), built primarily for irrigation on the Fish Creek; earth-type dam, 7 ft tall and 510 ft long.
- Surface area
- 40 ac
- Normal storage
- 120 ac-ft
- Max storage
- 173 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Low
- Owner
- DOUBLE 8 LAND CORPORATION
All listed purposes: Irrigation;Fish and Wildlife Pond.
Source: USACE National Inventory of Dams, NID ID WY00388 · Operator website
Nearby Lakes in Carbon County
Frequently asked questions about Sederlin Lake
Where is Sederlin Lake?
- Sederlin Lake is a lake in Carbon County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Sederlin Lake?
- Sederlin Lake in Carbon County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Phosphorus: 50 µg/L. Surface area: 40 acres.
Is Sederlin 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
5 measurements from 1 monitoring station, 2013–2014. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- State of Wyoming Department of Environmental Quality Watershed Program
WYDEQ_WATERSHED5 samples · 2013–2014
Analytical methods
- Total Phosphorus After Block Digestion
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.