Little Long Lake
Barry County, Michigan168 acresView mapDirections
EGLE publishes the water-quality measurements for Little Long Lake. Here is what has been measured.
- Mesotrophic
- 30 ft max depth
- Public access
Little Long Lake in Barry County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 13 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 30 ft. Surface area: 168.1 acres.
Free interactive depth-contour map of Little Long Lake, reaching a maximum surveyed depth of 30 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Little Long Lake is a 168-acre mesotrophic lake in Barry County, Michigan with a maximum depth of 30 feet. Phosphorus level is improving over recent sampling years. The lake supports 1 documented fish species including Rainbow smelt. Public access is available. Compared to the 6 other monitored lakes in Barry County, Little Long Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-24. Methodology: how these readings are compared.
What Little Long Lake is good for
From access and monitoring records, not editorial picks.
- Clear water13 ft of visibility
- Deep water30 ft surveyed max depth
Swimming conditions
Readings onlyLow algae
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Little Long Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Little Long Lake
These are the measurements EGLE publishes for Little Long Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Good clarity, visible to about 13 ft. Phosphorus 10 µg/L. Chlorophyll-a 2.2 µg/L. TSI 39.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 13ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | 2.2µg/L | Good GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 39 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Little Long Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Little Long Lake typically sits around 71°F at the surface in September. Summer average is about 70°F. Usually warmest in Aug (about 73°F) and coldest in May (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (73°F).
Typical surface water temperature by month, from 899 field readings (2010–2023) via the EPA Water Quality Portal. See the full Little Long Lake water temperature breakdown →
Lake Details
Max depth
30 ft
Surface area
168 acres
Public access
Yes
Listed by EGLE
Lake Size & Watershed
Watershed (drainage) area
4 sq mi
HydroLAKES / HydroSHEDS
Shoreline
2.8 mi
HydroLAKES / HydroSHEDS
Elevation
892 ft
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS).
Stays via Stay22
Stays near Little Long Lake
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Fish Species
Click a species to see every lake where it is documented.
Fishing Little Long Lake
Water Quality Trend: Stable
Based on 7 years of monitoring (2016–2023).
Water clarity
Stable6 years
Phosphorus
Improving-0.87 µg/L/yr7 years
Chlorophyll-a
Worsening+0.26 µg/L/yr7 years
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Little Long Lake under Clean Water Act (NPDES) discharge permits.
- Hickory Gables-CafoHickory Corners · 1 mi away · NPDES MI0058276
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Barry County
Frequently asked questions about Little Long Lake
Where is Little Long Lake?
- Little Long Lake is a lake in Barry County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Little Long Lake?
- Little Long Lake in Barry County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 13 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 2.2 µg/L. Maximum depth: 30 ft. Surface area: 168.1 acres.
Is Little Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Little Long Lake?
- Little Long Lake typically sits around 71°F at the surface in September, from 899 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.
How deep is Little Long Lake?
- Little Long Lake has a maximum depth of 30 feet. The lake covers 168.1 acres.
What fish are in Little Long Lake?
- Fish species found in Little Long Lake include Rainbow smelt. Little Long Lake is located in Barry County, Michigan.
Can I fish at Little Long Lake?
- Public access to Little Long Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Michigan's fish and wildlife agency, so check its current regulations before you go.
Explore Little Long Lake across LakeQuality
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Where this data comes from
153 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_MICORPS153 samples · 2016–2023
Analytical methods
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
Monitoring station identifiers (1)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)