Cutler Reservoir
Cache County, UtahView 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.
- Impaired · Nutrients (phosphorus, nitrogen)
- Limited data
Cutler Reservoir in Cache County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1 ft visibility. Phosphorus: 100 µg/L. Chlorophyll-a (algae): 11.2 µg/L.
- Clarity
- 1 ft
- Phosphorus
- 100 µg/L
- Chlorophyll-a
- 11.2 µg/L
- Trend
- ↓ Declining
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Watch Cutler Reservoir’s letter
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Why Cutler 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 Cutler Reservoir, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus 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 Utah DWQ and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Cutler Reservoir is a lake in Cache County, Utah. Overall water quality is declining over recent sampling years. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Utah DWQ, last sampled 2020-06-09. Grade methodology: LakeQuality methodology.
What Cutler 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. Cutler Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Water quality measurements for Cutler Reservoir
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 1 ft of visibility. Phosphorus 100 µg/L. Chlorophyll-a 11.2 µg/L. TSI 67.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 1 ft | Not graded |
| Phosphorus | 100 µg/L | Not graded |
| Chlorophyll-a (Algae) | 11.2 µg/L | Not graded |
| Trophic State Index (TSI) | 67 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Recreation & Access
- Bear River 3800 NSemi-private
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Cutler Reservoir
Water Quality Trend: ↓ Declining
Based on 9 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.004 m/yr | 9 |
| Phosphorus | ↓ Declining | +208 µg/L/yr | 3 |
| Chlorophyll-a | ↓ Declining | +0.47 µg/L/yr | 5 |
EPA Impairment Status
Cutler Reservoir is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit UT-L-16010202-002_00 · Official waterbody report
Graded lakes near Cutler Reservoir
Cutler Reservoir has no grade, but these lakes within a short drive do.
Nearby Lakes in Cache County
Frequently asked questions about Cutler Reservoir
Where is Cutler Reservoir?
- Cutler Reservoir is a lake in Cache County, Utah. 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 Cutler Reservoir?
- Cutler Reservoir in Cache County, Utah is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 1 ft visibility. Phosphorus: 100 µg/L. Chlorophyll-a (algae): 11.2 µg/L.
Is Cutler Reservoir safe to swim in?
- The letter is not a swimming clearance. Cutler Reservoir is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen). Check local advisories before you swim.
Are there boat ramps on Cutler Reservoir?
- Cutler Reservoir has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Bear River 3800 N.
Explore Cutler Reservoir across LakeQuality
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Where this data comes from
5 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Utah Department Of Environmental Quality
UTAHDWQ_WQX5 samples · 2020
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Named boat-access points from the USGS National Boat Ramps inventory