Swan Lake
Iron County, Michigan160 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.
- 20 ft max depth
- Public access
- Limited data
Swan Lake in Iron County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.5 ft visibility. Maximum depth: 20 ft. Surface area: 159.5 acres.
- Clarity
- 9.5 ft
- Max depth
- 20 ft
- Area
- 160 acres
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Swan Lake’s letter
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Free interactive depth-contour map of Swan Lake, reaching a maximum surveyed depth of 20 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Swan Lake has no grade
Swan 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, Swan Lake is Not Rated — not an F. Its 9.5-foot median from 61 readings collected 2016–2022 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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Swan Lake is a 160-acre lake in Iron County, Michigan with a maximum depth of 20 feet. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-05. Grade methodology: LakeQuality methodology.
What Swan Lake 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. Check local advisories before you swim.
Water quality measurements for Swan Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.5 ft. TSI 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 20 ft |
| Surface Area | 160 acres |
| Public Access | Yes |
Recreation & Access
- Swan LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Swan Lake
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.334 m/yr | 7 |
| Phosphorus | ↓ Declining | +2.37 µg/L/yr | 7 |
| Chlorophyll-a | ↓ Declining | +0.42 µg/L/yr | 7 |
Graded lakes near Swan Lake
Swan Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Iron County
Frequently asked questions about Swan Lake
Where is Swan Lake?
- Swan Lake is a lake in Iron County, Michigan. 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 Swan Lake?
- Swan Lake in Iron County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.5 ft visibility. Maximum depth: 20 ft. Surface area: 159.5 acres.
Is Swan Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Swan Lake?
- Swan Lake has a maximum depth of 20 feet. The lake covers 159.5 acres.
Are there boat ramps on Swan Lake?
- Swan Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Swan Lake. Public access is listed as yes.
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Where this data comes from
61 measurements from 1 monitoring station, 2016–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS61 samples · 2016–2022
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
Named boat-access points from the USGS National Boat Ramps inventory