Maston Lake
Kent County, MichiganView mapDirections
Clarity, phosphorus, and algae all sit in the cleanest band for this region.
- Mesotrophic
- Impaired · Pathogens (E. coli, fecal)
- #6 of 10 in the county
- Public access
- Limited data
Maston Lake in Kent County, Michigan has a water quality grade of A (Excellent). Water clarity: 11.3 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
- Clarity
- 11.3 ft
- Type
- Mesotrophic
- Phosphorus
- 10 µg/L
- Chlorophyll-a
- 2.4 µg/L
- Trend
- → Stable
- Public access
- Yes
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Watch Maston Lake’s letter
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Free interactive depth-contour map of Maston Lake, reaching a maximum surveyed depth of 46 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Maston Lake is a mesotrophic lake in Kent County, Michigan. Water quality is graded A based on 2 sampling years through 2023. Water clarity is improving over recent sampling years. Limited fish-species data available. Public access is available. Compared to the 9 other monitored lakes in Kent County, Maston Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-07-05. Grade methodology: LakeQuality methodology.
What Maston Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11.3 ft of visibility
Swimming Safety
Grade onlyBacteria advisory
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The A is nutrients and algae, not a swimming clearance. Maston Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
Water Quality Grade: A (Excellent)
Good clarity, visible to about 11.3 ft. Phosphorus 10 µg/L. Chlorophyll-a 2.4 µg/L. TSI 40. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11.3 ft | Not graded |
| Phosphorus | 10 µg/L | Good |
| Chlorophyll-a (Algae) | 2.4 µg/L | Good |
| Trophic State Index (TSI) | 40 | Mesotrophic |
Moderate nutrients, good water quality
Fishing Maston Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.658 m/yr | 5 |
| Phosphorus | → Stable | +0.1 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +0.32 µg/L/yr | 4 |
EPA Impairment Status
Maston 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 MI040500060107-02 · Official waterbody report · Matched by proximity (2.75 km)
County Ranking
Ranked #6 of 10 lakes in Kent County
Nearby Lakes in Kent County
Frequently asked questions about Maston Lake
Where is Maston Lake?
- Maston Lake is a lake in Kent County, Michigan. LakeQuality grades it A for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Maston Lake?
- Maston Lake in Kent County, Michigan has a water quality grade of A (Excellent). Water clarity: 11.3 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.4 µg/L.
Is Maston Lake safe to swim in?
- The A is nutrients and algae, not a swimming clearance. Maston Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
Explore Maston Lake across LakeQuality
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Where this data comes from
104 measurements from 1 monitoring station, 2016–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS104 samples · 2016–2023
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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