Cascade R W of Sugarloaf Island Lake
Valley County, IdahoView mapDirections
This is the name Idaho DEQ records for this water. It can describe one sampling location rather than the water as a whole.
Idaho DEQ publishes the water-quality measurements for Cascade R W of Sugarloaf Island Lake. Here is what has been measured.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- Public access
Cascade R W of Sugarloaf Island Lake in Valley County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Water clarity: 8.2 ft visibility. Phosphorus: 28.5 µg/L. Chlorophyll-a (algae): 7.5 µg/L.
Cascade R W of Sugarloaf Island Lake is a productive, nutrient-rich eutrophic lake in Valley County, Idaho. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 8 other monitored lakes in Valley County, Cascade R W of Sugarloaf Island Lake ranks #8 for water quality.
Source: EPA Water Quality Portal sampling records, IDEQ, last sampled 2022-09-22. Methodology: how these readings are compared.
Cascade R W of Sugarloaf Island Lake has one public boat landing. For a place on the water, look through cabin and lake-house rentals near Cascade R W of Sugarloaf Island Lake on Vrbo. For a hotel or motel room, Booking.com and Expedia both search around the lake.
What Cascade R W of Sugarloaf Island Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyElevated nutrients
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Cascade R W of Sugarloaf Island Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
Whether Cascade R W of Sugarloaf Island Lake is safe to swim in today is a call for the Idaho Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Cascade R W of Sugarloaf Island Lake
These are the measurements Idaho DEQ publishes for Cascade R W of Sugarloaf Island Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 8.2 ft. Phosphorus 28.5 µg/L. Chlorophyll-a 7.5 µg/L. TSI 50.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 28.5µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 7.5µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 50 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Cascade R W of Sugarloaf Island Lake
Answers come straight from the public measurements and survey records on this page.
Recreation & Access
- SugarloafPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Cascade R W of Sugarloaf Island Lake
Compare lakeside cabins, hotels, and vacation rentals near Cascade R W of Sugarloaf Island Lake in Valley County, Idaho — 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Cascade R W of Sugarloaf Island Lake are listed below.
Top-rated places to stay near Cascade R W of Sugarloaf Island Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Fishing Cascade R W of Sugarloaf Island Lake
Water Quality Trend: Improving
Based on 7 years of monitoring (2012–2022).
Water clarity
Improving7 years
Phosphorus
Improving-1.7 µg/L/yr7 years
Chlorophyll-a
Worsening+0.51 µg/L/yr7 years
EPA Impairment Status
Cascade R W of Sugarloaf Island Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit ID17050123SW007L_0L · Official waterbody report
Nearby Lakes in Valley County
Frequently asked questions about Cascade R W of Sugarloaf Island Lake
Where is Cascade R W of Sugarloaf Island Lake?
- Cascade R W of Sugarloaf Island Lake is in Valley County, Idaho. This is the name Idaho DEQ records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by Idaho DEQ and shown on this page as reported.
What is the water quality of Cascade R W of Sugarloaf Island Lake?
- Cascade R W of Sugarloaf Island Lake in Valley County, Idaho has water-quality measurements published by Idaho DEQ, shown here as reported. Water clarity: 8.2 ft visibility. Phosphorus: 28.5 µg/L. Chlorophyll-a (algae): 7.5 µg/L.
Is Cascade R W of Sugarloaf Island Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Cascade R W of Sugarloaf Island Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for nutrients (phosphorus, nitrogen), pH / acidity. Check local advisories before you swim.
Are there boat ramps on Cascade R W of Sugarloaf Island Lake?
- Cascade R W of Sugarloaf Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sugarloaf. Public access is listed as yes.
Can I fish at Cascade R W of Sugarloaf Island Lake?
- Cascade R W of Sugarloaf Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Idaho's fish and wildlife agency, so check its current regulations before you go.
Explore Cascade R W of Sugarloaf Island Lake across LakeQuality
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Where this data comes from
82 measurements from 1 monitoring station, 2012–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Bureau of Reclamation
1119USBR_WQX82 samples · 2012–2022
Analytical methods
- Depth, Secchi disk depth
- Zebra/Quagga Mussel APHA 10200G Modified
- Phosphorus by Single Reagent Colorimetry
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidity by Nephelometry
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from 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