East Canyon Reservoir
Morgan County, Utah684 acresView mapDirections
Nutrients and algae sit mid-range for this region.
↓ down from A at the last regrade
- Mesotrophic
- Impaired · Algal growth
- #1 of 5 in the county
- Public access
- Limited data
East Canyon Reservoir in Morgan County, Utah has a water quality grade of C (Fair). Water clarity: 13.8 ft visibility. Phosphorus: 16.8 µg/L. Chlorophyll-a (algae): 3.4 µg/L. Surface area: 684 acres.
- Clarity
- 13.8 ft
- Area
- 684 acres
- Type
- Mesotrophic
- Phosphorus
- 16.8 µg/L
- Chlorophyll-a
- 3.4 µg/L
- Trend
- → Stable
- Public access
- Yes
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Watch East Canyon Reservoir’s letter
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East Canyon Reservoir is a 684-acre mesotrophic lake in Morgan County, Utah. Water quality is graded C based on 2 sampling years through 2022. Water clarity is declining 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 Morgan County, East Canyon Reservoir ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2022-09-22. Grade methodology: LakeQuality methodology.
What East Canyon Reservoir is good for
From access and monitoring records, not editorial picks.
- Clear water13.8 ft of visibility
- Boat launch1 documented ramp
Swimming Safety
Grade onlyBacteria advisory
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 C is nutrients and algae, not a swimming clearance. East Canyon Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal). Check local advisories before you swim.
Water Quality Grade: C (Fair)
Good clarity, visible to about 13.8 ft. Phosphorus 16.8 µg/L. Chlorophyll-a 3.4 µg/L. TSI 42. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 13.8 ft | Not graded |
| Phosphorus | 16.8 µg/L | Good |
| Chlorophyll-a (Algae) | 3.4 µg/L | Fair |
| Trophic State Index (TSI) | 42 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 684 acres |
| Public Access | Yes |
No bathymetric survey has been published for East Canyon Reservoir, so its depth is not documented here.
Recreation & Access
- East Canyon ReservoirPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing East Canyon Reservoir
Water Quality Trend: → Stable
Based on 8 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.105 m/yr | 8 |
| Chlorophyll-a | ↑ Improving | -0.37 µg/L/yr | 3 |
Reservoir Info (USACE NID)
East Canyon Reservoir is a man-made reservoir impounded by the East Canyon Dam (completed 1966), built primarily for flood risk reduction on the East Canyon Creek; concrete-type dam, 260 ft tall and 436 ft long.
- Surface area
- 684 ac
- Normal storage
- 51,200 ac-ft
- Max storage
- 58,350 ac-ft
- Drainage area
- 143.74 sq mi
- Hazard class
- High
- Owner
- BUREAU OF RECLAMATION
All listed purposes: Flood Risk Reduction;Irrigation;Water Supply.
Source: USACE National Inventory of Dams, NID ID UT10119 · Operator website
EPA Impairment Status
East Canyon Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit UT-L-16020102-020_00 · Official waterbody report
County Ranking
Ranked #1 of 5 lakes in Morgan County
Nearby Lakes in Morgan County
Frequently asked questions about East Canyon Reservoir
Where is East Canyon Reservoir?
- East Canyon Reservoir is a lake in Morgan County, Utah. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for East Canyon Reservoir?
- East Canyon Reservoir in Morgan County, Utah has a water quality grade of C (Fair). Water clarity: 13.8 ft visibility. Phosphorus: 16.8 µg/L. Chlorophyll-a (algae): 3.4 µg/L. Surface area: 684 acres.
Is East Canyon Reservoir safe to swim in?
- The C is nutrients and algae, not a swimming clearance. East Canyon Reservoir is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, nutrients (phosphorus, nitrogen), pathogens (E. coli, fecal). Check local advisories before you swim.
Are there boat ramps on East Canyon Reservoir?
- East Canyon Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include East Canyon Reservoir. Public access is listed as yes.
Explore East Canyon Reservoir across LakeQuality
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Species activity outlook by water temperature and season
Where to stay at Utah's top lakes, each with its grade
Moderate nutrients, good water quality
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Where this data comes from
555 measurements from 2 monitoring stations, 2013–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX555 samples · 2013–2022
Analytical methods
- Field Measurements
- Phosphorus by Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
Monitoring station identifiers (2)
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
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory