Hogan Reservoir
Park County, Wyoming8 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- Limited data
Hogan Reservoir in Park County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 20 µg/L. Surface area: 8 acres.
- Area
- 8 acres
- Phosphorus
- 20 µg/L
- Trend
- ↑ Improving
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Watch Hogan Reservoir’s letter
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Why Hogan Reservoir has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Hogan Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by Wyoming DEQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Hogan Reservoir is a 8-acre lake in Park County, Wyoming. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2015-09-21. Grade methodology: LakeQuality methodology.
What Hogan Reservoir is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Hogan Reservoir
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Phosphorus 20 µg/L. TSI 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 20 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 8 acres |
No bathymetric survey has been published for Hogan Reservoir, so its depth is not documented here.
Recreation & Access
Public campgrounds near Hogan Reservoir
- Hogan and Luce Campground0.2 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Hogan Reservoir
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.27 m/yr | 2 |
| Phosphorus | ↑ Improving | -2.74 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.18 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Hogan Reservoir is a man-made reservoir impounded by the Paint Creek (completed 1911), built primarily for irrigation on the Paint Creek Offstream; earth-type dam, 20 ft tall and 740 ft long.
- Surface area
- 8 ac
- Normal storage
- 98 ac-ft
- Max storage
- 675 ac-ft
- Hazard class
- Low
- Owner
- FS RANCH, B4 RANCH
Source: USACE National Inventory of Dams, NID ID WY01179 · Operator website · Matched by proximity (0.38 km)
Graded lakes near Hogan Reservoir
Hogan Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Park County
Frequently asked questions about Hogan Reservoir
Where is Hogan Reservoir?
- Hogan Reservoir is a lake in Park County, Wyoming. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Hogan Reservoir?
- Hogan Reservoir in Park County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 20 µg/L. Surface area: 8 acres.
Is Hogan Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there campgrounds on Hogan Reservoir?
- Hogan Reservoir has 1 public campground from USGS The National Map within 5 km, including Hogan and Luce Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Hogan Reservoir across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2015. 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_WATERSHED4 samples · 2015
Analytical methods
- 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
Public campgrounds from USGS The National Map Structures, within about 3 miles