Lake Desmet Lpd
Johnson County, WyomingView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↓ down from A at the last regrade
- Oligotrophic
- #2 of 5 in the county
- Public access
- Limited data
Lake Desmet Lpd in Johnson County, Wyoming has a water quality grade of B (Good). Water clarity: 39.1 ft visibility. Phosphorus: 10 µg/L.
- Clarity
- 39.1 ft
- Type
- Oligotrophic
- Phosphorus
- 10 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Lake Desmet Lpd is a cold, clear oligotrophic lake in Johnson County, Wyoming. Water quality is graded B based on 1 sampling years through 2018. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 4 other monitored lakes in Johnson County, Lake Desmet Lpd ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2018-09-10. Grade methodology: LakeQuality methodology.
What Lake Desmet Lpd is good for
From access and monitoring records, not editorial picks.
- Clear water39.1 ft of visibility
- Boat launch1 documented ramp
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Crystal clear, you can see 39.1 ft down. Phosphorus 10 µg/L. TSI 31. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 39.1 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 31 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Recreation & Access
- Lake DeSmetPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Desmet Lpd
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.9 m/yr | 3 |
| Phosphorus | ↑ Improving | -0.89 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -0.1 µg/L/yr | 2 |
County Ranking
Ranked #2 of 5 lakes in Johnson County
Nearby Lakes in Johnson County
Frequently asked questions about Lake Desmet Lpd
Where is Lake Desmet Lpd?
- Lake Desmet Lpd is a lake in Johnson County, Wyoming. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Lake Desmet Lpd?
- Lake Desmet Lpd in Johnson County, Wyoming has a water quality grade of B (Good). Water clarity: 39.1 ft visibility. Phosphorus: 10 µg/L.
Is Lake Desmet Lpd safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Lake Desmet Lpd?
- Lake Desmet Lpd has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake DeSmet. Public access is listed as yes.
Explore Lake Desmet Lpd across LakeQuality
Species activity outlook by water temperature and season
Where to stay at Wyoming's top lakes, each with its grade
Low nutrients, clear water. The letter is not a swimming clearance.
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Other Grade B Lakes in Wyoming
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Where this data comes from
9 measurements from 1 monitoring station, 2017–2018. 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_WATERSHED9 samples · 2017–2018
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Named boat-access points from the USGS National Boat Ramps inventory