Sulphur Creek Reservoir
Uinta County, Wyoming632 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.
- Public access
- Limited data
Sulphur Creek Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.1 ft visibility. Phosphorus: 14.2 µg/L. Surface area: 632 acres.
- Clarity
- 3.1 ft
- Area
- 632 acres
- Phosphorus
- 14.2 µg/L
- Trend
- ↑ Improving
- Public access
- Yes
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Watch Sulphur Creek Reservoir’s letter
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Why Sulphur Creek 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 Sulphur Creek Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity and phosphorus, but not 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.
Sulphur Creek Reservoir is a 632-acre lake in Uinta County, Wyoming. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wyoming DEQ, last sampled 2013-09-12. Grade methodology: LakeQuality methodology.
What Sulphur Creek Reservoir is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Sulphur Creek Reservoir
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 3.1 ft of visibility. Phosphorus 14.2 µg/L. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.1 ft | Not graded |
| Phosphorus | 14.2 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 632 acres |
| Public Access | Yes |
No bathymetric survey has been published for Sulphur Creek Reservoir, so its depth is not documented here.
Recreation & Access
- Sulphur Creek ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Sulphur Creek Reservoir
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.129 m/yr | 3 |
| Phosphorus | ↑ Improving | -4.31 µg/L/yr | 3 |
| Chlorophyll-a | → Stable | +0.04 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Sulphur Creek Reservoir is a man-made reservoir impounded by the Sulphur Creek (completed 1964), built primarily for irrigation on the Sulphur Creek; earth-type dam, 85 ft tall and 4,725 ft long.
- Surface area
- 632 ac
- Normal storage
- 19,775 ac-ft
- Max storage
- 19,775 ac-ft
- Drainage area
- 62.7 sq mi
- Hazard class
- High
- Owner
- CITY OF EVANSTON
All listed purposes: Irrigation;Other;Fish and Wildlife Pond;Water Supply;Flood Risk Reduction.
Source: USACE National Inventory of Dams, NID ID WY01196 · Operator website
Graded lakes near Sulphur Creek Reservoir
Sulphur Creek Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Uinta County
Frequently asked questions about Sulphur Creek Reservoir
Where is Sulphur Creek Reservoir?
- Sulphur Creek Reservoir is a lake in Uinta 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 Sulphur Creek Reservoir?
- Sulphur Creek Reservoir in Uinta County, Wyoming is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 3.1 ft visibility. Phosphorus: 14.2 µg/L. Surface area: 632 acres.
Is Sulphur Creek Reservoir safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Sulphur Creek Reservoir?
- Sulphur Creek Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sulphur Creek Reservoir. Public access is listed as yes.
Explore Sulphur Creek Reservoir across LakeQuality
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Where this data comes from
4 measurements from 1 monitoring station, 2013. 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 · 2013
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