Harwood Lake
Cass County, Michigan118 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.
- 50 ft max depth
- Public access
- Limited data
Harwood Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Maximum depth: 50 ft. Surface area: 117.8 acres.
- Clarity
- 10 ft
- Max depth
- 50 ft
- Area
- 118 acres
- Trend
- ↓ Declining
- Public access
- Yes
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Watch Harwood Lake’s letter
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Free interactive depth-contour map of Harwood Lake, reaching a maximum surveyed depth of 50 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Harwood Lake has no grade
Harwood 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, Harwood Lake is Not Rated — not an F. Its 10-foot median from 75 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.
Harwood Lake is a 118-acre lake in Cass County, Michigan with a maximum depth of 50 feet. Overall water quality is declining over recent sampling years. The lake supports 11 documented fish species including Blackchin shiner, Blackstripe topminnow, and Bluegill. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-16. Grade methodology: LakeQuality methodology.
What Harwood Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
- Boat launch1 documented ramp
- Fishing11 species recorded
- Deep water50 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Harwood Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10 ft. TSI 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 10 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 44 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 118 acres |
| Public Access | Yes |
Recreation & Access
- Harwood LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Harwood Lake
Water Quality Trend: ↓ Declining
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.19 m/yr | 4 |
Graded lakes near Harwood Lake
Harwood Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Cass County
Frequently asked questions about Harwood Lake
Where is Harwood Lake?
- Harwood Lake is a lake in Cass 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 Harwood Lake?
- Harwood Lake in Cass County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 10 ft visibility. Maximum depth: 50 ft. Surface area: 117.8 acres.
Is Harwood Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Harwood Lake?
- Harwood Lake has a maximum depth of 50 feet. The lake covers 117.8 acres.
What fish are in Harwood Lake?
- Fish species found in Harwood Lake include Blackchin shiner, Blackstripe topminnow, Bluegill, Bluntnose minnow, Green sunfish, Iowa darter, Lake herring, Largemouth bass, Northern longear sunfish, Western banded killifish, Yellow perch. Harwood Lake is located in Cass County, Michigan.
Are there boat ramps on Harwood Lake?
- Harwood Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Harwood Lake. Public access is listed as yes.
Explore Harwood Lake across LakeQuality
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Where this data comes from
75 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
NALMS75 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