Timmerman Lake
Timmerman Lake in Manistee County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5 ft visibility. Maximum depth: 31 ft.
- Clarity
- 5 ft
- Max depth
- 31 ft
- Trend
- ↓ Declining
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Why Timmerman 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 Timmerman 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.
Timmerman Lake is a lake in Manistee County, Michigan with a maximum depth of 31 feet. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2018-09-04. 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 Timmerman Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5 ft. Trophic State Index: 54.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 54 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Timmerman Lake
Compare lakeside cabins, hotels, and vacation rentals near Timmerman Lake in Manistee 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 Timmerman Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 31 ft |
Fishing Timmerman Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↓ Declining | -0.15 m/yr | 2 |
Graded lakes near Timmerman Lake
Timmerman Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Manistee County
Frequently asked questions about Timmerman Lake
Where is Timmerman Lake?
- Timmerman Lake is a lake in Manistee 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 Timmerman Lake?
- Timmerman Lake in Manistee County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5 ft visibility. Maximum depth: 31 ft.
Is Timmerman Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Timmerman 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 Timmerman Lake?
- Timmerman Lake has a maximum depth of 31 feet.
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Where this data comes from
15 measurements from 1 monitoring station, 2017–2018. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS15 samples · 2017–2018
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.