Canadice Lake
Ontario County, New York657 acresView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · PCBs
- 60 ft max depth
- Limited data
Canadice Lake in Ontario County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 18.8 ft visibility. Surface area: 657 acres.
- Clarity
- 18.8 ft
- Max depth
- ~60 ft est.
- Area
- 657 acres
- Trend
- ↓ Declining
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Watch Canadice Lake’s letter
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Why Canadice Lake has no grade
Canadice Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Canadice Lake is Not Rated — not an F. Its 18.8-foot median from 7 readings collected 2020–2022 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by NYSDEC and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Canadice Lake is a 657-acre lake in Ontario County, New York with an estimated average depth of about 60 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, NYSDEC, last sampled 2022-07-12. Grade methodology: LakeQuality methodology.
What Canadice Lake is good for
From access and monitoring records, not editorial picks.
- Clear water18.8 ft of visibility
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Canadice Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pCBs. Check local advisories before you swim.
Water quality measurements for Canadice Lake
These readings exist but are not enough for an A–F grade — see why.
Crystal clear, you can see 18.8 ft down. TSI 35.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 18.8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 35 | Oligotrophic |
Low nutrients, clear water. The letter is not a swimming clearance.
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~60 ft est. |
| Average Depth | ~58 ft est. |
| Surface Area | 657 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. New York has not published bathymetry for Canadice Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Fishing Canadice Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.65 m/yr | 2 |
Reservoir Info (USACE NID)
Canadice Lake is a man-made reservoir impounded by the Canadice Lake Dam (completed 1947), built primarily for water supply on the CANADICE LAKE OUTLET; earth-type dam, 11 ft tall and 735 ft long.
- Surface area
- 657 ac
- Normal storage
- 4,712 ac-ft
- Max storage
- 16,195 ac-ft
- Drainage area
- 12.34 sq mi
- Hazard class
- High
- Owner
- CITY OF ROCHESTER
Source: USACE National Inventory of Dams, NID ID NY00443 · Operator website
EPA Impairment Status
Canadice Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit NY0402-0002 · Official waterbody report
Nearby Lakes in Ontario County
Frequently asked questions about Canadice Lake
Where is Canadice Lake?
- Canadice Lake is a lake in Ontario County, New York. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Canadice Lake?
- Canadice Lake in Ontario County, New York is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 18.8 ft visibility. Surface area: 657 acres.
Is Canadice Lake safe to swim in?
- The letter is not a swimming clearance. Canadice Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pCBs. Check local advisories before you swim.
How deep is Canadice Lake?
- No published bathymetric survey covers Canadice Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 60 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 657 acres.
Explore Canadice Lake across LakeQuality
Depth, room, public access, and the state wake-sport rules
19.4 mi away · cable-pulled, no boat wake
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Where this data comes from
7 measurements from 1 monitoring station, 2020–2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS7 samples · 2020–2022
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
Lake size & watershed from HydroLAKES (HydroSHEDS)