Healy Reservoir
Johnson County, Wyoming246 acresView mapDirections
Wyoming DEQ publishes the water-quality measurements for Healy Reservoir. Here is what has been measured.
- Mesotrophic
- 19 ft max depth
- Public access
- Limited data
Healy Reservoir in Johnson County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 15.3 ft visibility. Phosphorus: 20 µg/L. Surface area: 246 acres.
Healy Reservoir is a 246-acre mesotrophic lake in Johnson County, Wyoming with an estimated average depth of about 19 feet. 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, Healy Reservoir ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2019-09-09. Methodology: how these readings are compared.
What Healy Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water15.3 ft of visibility
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
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 Healy Reservoir 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 Healy Reservoir
These are the measurements Wyoming DEQ publishes for Healy Reservoir, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15.3 ft down. Phosphorus 20 µg/L. TSI 43.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15.3ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 20µg/L | Good GoodFairPoor |
| 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. | 43 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Healy Reservoir
Answers come straight from the public measurements and survey records on this page.
Lake Details
Max depth
~19 ft est.
Surface area
246 acres
Public access
Yes
Listed by Wyoming DEQ
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Wyoming has not published bathymetry for Healy Reservoir.
Lake Size & Watershed
Watershed (drainage) area
354 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.4 mi
HydroLAKES / HydroSHEDS
Elevation
4,380 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Healy ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Stays near Healy Reservoir
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Fishing Healy Reservoir
Water quality readings over time
2 seasons of samples on record (2016–2019). Calling a direction takes at least 4 years of the same measurement.
Phosphorus
Improving-1.67 µg/L/yr2 years
Reservoir Info (USACE NID)
Healy Reservoir is a man-made reservoir impounded by the Healy (completed 1975), built primarily for irrigation on the Clear Creek; earth-type dam, 76 ft tall and 8,900 ft long.
- Surface area
- 246 ac
- Normal storage
- 5,140 ac-ft
- Max storage
- 6,500 ac-ft
- Drainage area
- 1.1 sq mi
- Hazard class
- High
- Owner
- WYOMING WATER DEVELOPMENT COMMISSION
All listed purposes: Irrigation;Fire Protection, Stock, Or Small Fish Pond;Other;Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID WY01495 · Operator website
Nearby Lakes in Johnson County
Frequently asked questions about Healy Reservoir
Where is Healy Reservoir?
- Healy Reservoir is a lake in Johnson County, Wyoming. Its water-quality measurements are published by Wyoming DEQ and shown on this page as reported.
What is the water quality of Healy Reservoir?
- Healy Reservoir in Johnson County, Wyoming has water-quality measurements published by Wyoming DEQ, shown here as reported. Water clarity: 15.3 ft visibility. Phosphorus: 20 µg/L. Surface area: 246 acres.
Is Healy Reservoir safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
How deep is Healy Reservoir?
- No published bathymetric survey covers Healy Reservoir, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 19 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 246 acres.
Are there boat ramps on Healy Reservoir?
- Healy Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Healy Reservoir. Public access is listed as yes.
Can I fish at Healy Reservoir?
- Healy Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Wyoming's fish and wildlife agency, so check its current regulations before you go.
Explore Healy Reservoir across LakeQuality
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Mesotrophic Lakes in Wyoming
Where this data comes from
7 measurements from 2 monitoring stations, 2016–2019. 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_WATERSHED7 samples · 2016–2019
Analytical methods
- Secchi
- Total Phosphorus After Block Digestion
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.
Other records on this page
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory