Little Island Lake
Little Island Lake in Iosco County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7 ft visibility. Maximum depth: 9 ft. Surface area: 57.1 acres.
- Clarity
- 7 ft
- Max depth
- 9 ft
- Area
- 57 acres
- Trend
- ↑ Improving
- Public access
- Yes
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Why Little Island 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 Little Island 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.
Little Island Lake is a 57-acre lake in Iosco County, Michigan with a maximum depth of 9 feet. Overall water quality is improving over recent sampling years. The lake supports 1 documented fish species including Emerald shiner. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2018-09-09. 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 Little Island Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7 ft. Trophic State Index: 49.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 49 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Little Island Lake
Compare lakeside cabins, hotels, and vacation rentals near Little Island Lake in Iosco 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 Little Island Lake
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Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 9 ft |
| Surface Area | 57 acres |
| Public Access | Yes |
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Recreation & Access
- Round 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 Little Island Lake
Water Quality Trend: ↑ Improving
Based on 3 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.335 m/yr | 3 |
| Phosphorus | ↑ Improving | -4 µg/L/yr | 2 |
| Chlorophyll-a | ↓ Declining | +1.8 µg/L/yr | 3 |
EPA Impairment Status
Little Island 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 MI040801010204-02 · Official waterbody report · Matched by proximity (0.67 km)
Graded lakes near Little Island Lake
Little Island Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Iosco County
Frequently asked questions about Little Island Lake
Where is Little Island Lake?
- Little Island Lake is a lake in Iosco 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 Little Island Lake?
- Little Island Lake in Iosco County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7 ft visibility. Maximum depth: 9 ft. Surface area: 57.1 acres.
Is Little Island Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Little Island 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 Little Island Lake?
- Little Island Lake has a maximum depth of 9 feet. The lake covers 57.1 acres.
What fish are in Little Island Lake?
- Fish species found in Little Island Lake include Emerald shiner. Little Island Lake is located in Iosco County, Michigan.
Are there boat ramps on Little Island Lake?
- Little Island Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Round Lake. Public access is listed as yes.
Explore Little Island Lake across LakeQuality
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Where this data comes from
53 measurements from 1 monitoring station, 2016–2018. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS53 samples · 2016–2018
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory