Hoop Lake
Summit County, UtahView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- #17 of 18 in the county
- Limited data
Hoop Lake in Summit County, Utah has a water quality grade of D (Nutrient-rich). Water clarity: 5.6 ft visibility. Phosphorus: 45 µg/L. Chlorophyll-a (algae): 13 µg/L.
- Clarity
- 5.6 ft
- Type
- Eutrophic
- Phosphorus
- 45 µg/L
- Chlorophyll-a
- 13 µg/L
- Trend
- ↓ Declining
Stays via Stay22
Stays near Hoop Lake
Compare lakeside cabins, hotels, and vacation rentals near Hoop Lake in Summit County, Utah — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water. The water-quality grade measures nutrients and algae, not lodging — cabins and rentals around Hoop Lake are listed below.
Top-rated places to stay near Hoop Lake
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Watch Hoop Lake’s letter
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Hoop Lake is a productive, nutrient-rich eutrophic lake in Summit County, Utah. Water quality is graded D based on 2 sampling years through 2023. Overall water quality is declining over recent sampling years. Compared to the 17 other monitored lakes in Summit County, Hoop Lake ranks #17 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2023-09-27. Grade methodology: LakeQuality methodology.
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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 5.6 ft. Phosphorus 45 µg/L. Chlorophyll-a 13 µg/L. TSI 56. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.6 ft | Not graded |
| Phosphorus | 45 µg/L | Poor |
| Chlorophyll-a (Algae) | 13 µg/L | Poor |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Fishing Hoop Lake
Water Quality Trend: ↓ Declining
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.007 m/yr | 3 |
| Chlorophyll-a | ↓ Declining | +1.01 µg/L/yr | 2 |
Reservoir Info (USACE NID)
Hoop Lake is a man-made reservoir impounded by the Hoop Lake (completed 1939), built primarily for irrigation on the East Fork of Beaver Creek; earth-type dam, 30 ft tall and 824 ft long.
- Normal storage
- 3,925 ac-ft
- Max storage
- 4,800 ac-ft
- Drainage area
- 25 sq mi
- Hazard class
- Significant
- Owner
- HOOP LAKE RESERVOIR & IRRIGATION CO
Source: USACE National Inventory of Dams, NID ID UT00143 · Operator website
County Ranking
Ranked #17 of 18 lakes in Summit County
Nearby Lakes in Summit County
Frequently asked questions about Hoop Lake
Where is Hoop Lake?
- Hoop Lake is a lake in Summit County, Utah. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Hoop Lake?
- Hoop Lake in Summit County, Utah has a water quality grade of D (Nutrient-rich). Water clarity: 5.6 ft visibility. Phosphorus: 45 µg/L. Chlorophyll-a (algae): 13 µg/L.
Is Hoop Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Explore Hoop Lake across LakeQuality
More Utah Lake Rankings
Other Grade D Lakes in Utah
Eutrophic Lakes in Utah
Where this data comes from
22 measurements from 1 monitoring station, 2017–2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX22 samples · 2017–2023
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
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.