Perrin Lake
St. Joseph County, Michigan109 acresView mapDirections
EGLE publishes the water-quality measurements for Perrin Lake. Here is what has been measured.
- Mesotrophic
- Public access
- Limited data
Perrin Lake in St. Joseph County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Phosphorus: 9.5 µg/L. Surface area: 109 acres.
Perrin Lake is a 109-acre mesotrophic lake in St. Joseph County, Michigan. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 7 other monitored lakes in St. Joseph County, Perrin Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2019-09-20. Methodology: how these readings are compared.
What Perrin Lake is good for
From access and monitoring records, not editorial picks.
- Clear water10 ft of visibility
- Boat launch1 documented ramp
Swimming conditions
Readings onlyLimited data
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 Perrin 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 Perrin Lake
These are the measurements EGLE publishes for Perrin 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 10 ft. Phosphorus 9.5 µg/L. TSI 40.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 10ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 9.5µg/L | Good GoodFairPoor |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 40 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Perrin Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
109 acres
Public access
Yes
Listed by EGLE
No bathymetric survey has been published for Perrin Lake, so its depth is not documented here.
Recreation & Access
- Perrin LakePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
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Fishing Perrin Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2016–2019).
Water clarity
Improving3 years
Phosphorus
Stable0 µg/L/yr4 years
Nearby Lakes in St. Joseph County
Frequently asked questions about Perrin Lake
Where is Perrin Lake?
- Perrin Lake is a lake in St. Joseph County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Perrin Lake?
- Perrin Lake in St. Joseph County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 10 ft visibility. Phosphorus: 9.5 µg/L. Surface area: 109 acres.
Is Perrin Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Are there boat ramps on Perrin Lake?
- Perrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Perrin Lake. Public access is listed as yes.
Can I fish at Perrin Lake?
- Perrin Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. 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 Perrin Lake across LakeQuality
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Where this data comes from
56 measurements from 1 monitoring station, 2016–2019. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS56 samples · 2016–2019
Analytical methods
- Phosphorus by Colorimetry
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
Named boat-access points from the USGS National Boat Ramps inventory