Lake Mecosta
Mecosta County, Michigan312 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.
- 39 ft max depth
- Public access
- Limited data
Lake Mecosta in Mecosta County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Maximum depth: 39 ft. Surface area: 311.7 acres.
- Clarity
- 9.8 ft
- Max depth
- 39 ft
- Area
- 312 acres
- Trend
- → Stable
- Public access
- Yes
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Watch Lake Mecosta’s letter
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Why Lake Mecosta has no grade
Lake Mecosta 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, Lake Mecosta is Not Rated — not an F. Its 9.8-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.
Lake Mecosta is a 312-acre lake in Mecosta County, Michigan with a maximum depth of 39 feet. Water clarity is improving 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 2022-09-15. Grade methodology: LakeQuality methodology.
What Lake Mecosta is good for
From access and monitoring records, not editorial picks.
- Clear water9.8 ft of visibility
- Boat launch1 documented ramp
- Deep water39 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 Lake Mecosta
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 9.8 ft. TSI 44.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.8 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 | 39 ft |
| Surface Area | 312 acres |
| Public Access | Yes |
Recreation & Access
- Lake MecostaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Lake Mecosta
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.213 m/yr | 7 |
| Phosphorus | → Stable | +0.06 µg/L/yr | 7 |
| Chlorophyll-a | ↓ Declining | +0.35 µg/L/yr | 7 |
Graded lakes near Lake Mecosta
Lake Mecosta has no grade, but these lakes within a short drive do.
Nearby Lakes in Mecosta County
Frequently asked questions about Lake Mecosta
Where is Lake Mecosta?
- Lake Mecosta is a lake in Mecosta 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 Lake Mecosta?
- Lake Mecosta in Mecosta County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 9.8 ft visibility. Maximum depth: 39 ft. Surface area: 311.7 acres.
Is Lake Mecosta safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Lake Mecosta?
- Lake Mecosta has a maximum depth of 39 feet. The lake covers 311.7 acres.
Are there boat ramps on Lake Mecosta?
- Lake Mecosta has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Lake Mecosta. Public access is listed as yes.
Explore Lake Mecosta 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