Clark Lake
Clark Lake in Jackson 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: 575.7 acres.
- Clarity
- 10 ft
- Max depth
- 50 ft
- Area
- 576 acres
- Trend
- ↑ Improving
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Why Clark Lake 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 Clark Lake, 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. Sampling here has recorded water clarity, but not 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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Clark Lake is a 576-acre lake in Jackson County, Michigan with a maximum depth of 50 feet. Overall water quality is improving over recent sampling years. The lake supports 19 documented fish species including Black bullhead, Blackchin shiner, and Blacknose shiner.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2017-09-15. Grade methodology: LakeQuality methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Clark Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 10 ft. Trophic State Index: 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
Where to stay near Clark Lake
Compare lakeside cabins, hotels, and vacation rentals near Clark Lake in Jackson County, Michigan — 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.
Top-rated places to stay near Clark Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 50 ft |
| Surface Area | 576 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Clark Lake
Water Quality Trend: ↑ Improving
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +1 m/yr | 2 |
| Phosphorus | ↑ Improving | -7 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +0.6 µg/L/yr | 2 |
EPA Impairment Status
Clark Lake 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 MI041000020101-03 · Official waterbody report
Nearby Lakes in Jackson County
Frequently asked questions about Clark Lake
Where is Clark Lake?
- Clark Lake is a lake in Jackson County, Michigan. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Clark Lake?
- Clark Lake in Jackson 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: 575.7 acres.
Is Clark Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Clark Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
How deep is Clark Lake?
- Clark Lake has a maximum depth of 50 feet. The lake covers 575.7 acres.
What fish are in Clark Lake?
- Fish species found in Clark Lake include Black bullhead, Blackchin shiner, Blacknose shiner, Bluegill, Bluntnose minnow, Brook silverside, Emerald shiner, Green sunfish, Largemouth bass, Longnose gar, Northern longear sunfish, Rock bass, Smallmouth bass, Spotfin shiner, Spottail shiner, Tadpole madtom, Western banded killifish, Yellow bullhead, Yellow perch. Clark Lake is located in Jackson County, Michigan.
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Where this data comes from
15 measurements from 1 monitoring station, 2016–2017. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS15 samples · 2016–2017
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