Ingerson Lake
Allegan County, Michigan16 acresView mapDirections
EGLE publishes the water-quality measurements for Ingerson Lake. Here is what has been measured.
- Mesotrophic
Ingerson Lake in Allegan County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 1.4 µg/L. Surface area: 15.6 acres.
Ingerson Lake is a 16-acre mesotrophic lake in Allegan County, Michigan. Overall water quality is declining over recent sampling years. Compared to the 4 other monitored lakes in Allegan County, Ingerson Lake ranks #5 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2025-11-25. Methodology: how these readings are compared.
Ingerson Lake covers about 16 acres in Allegan County. If you are planning to stay, you can search lake houses and cabins around Ingerson Lake on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
Swimming conditions
Readings onlyBacteria tested: exceedances
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.
Based on E. coli testing, Ingerson Lake occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 8.6% of 35 samples across 8 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Michigan’s current beach and health-department advisories before swimming.
Whether Ingerson 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 Ingerson Lake
These are the measurements EGLE publishes for Ingerson Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 9 ft. Phosphorus 39 µg/L. Chlorophyll-a 1.4 µg/L. TSI 46.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 39µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 1.4µg/L | Measured, not scored 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. | 46 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Ingerson Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Ingerson Lake typically sits around 54°F at the surface in October. Summer average is about 67°F. Usually warmest in Jul (about 68°F) and coldest in Jan (about 39°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (39°F) to its warmest (68°F).
Typical surface water temperature by month, from 679 field readings (2012–2024) via the EPA Water Quality Portal. See the full Ingerson Lake water temperature breakdown →
Lake Details
Surface area
16 acres
No bathymetric survey has been published for Ingerson Lake, so its depth is not documented here.
Stays via Stay22
Stays near Ingerson Lake
Compare lakeside cabins, hotels, and vacation rentals near Ingerson Lake in Allegan 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 Ingerson Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
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Fishing Ingerson Lake
Water Quality Trend: Worsening
Based on 10 years of monitoring (2016–2025).
Water clarity
Worsening2 years
Phosphorus
Worsening+12.16 µg/L/yr8 years
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Ingerson Lake under Clean Water Act (NPDES) discharge permits.
- John Schaendorf DairyAllegan · 3.9 mi away · NPDES MIG440012
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 Allegan County
Frequently asked questions about Ingerson Lake
Where is Ingerson Lake?
- Ingerson Lake is a lake in Allegan County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Ingerson Lake?
- Ingerson Lake in Allegan County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 9 ft visibility. Phosphorus: 39 µg/L. Chlorophyll-a (algae): 1.4 µg/L. Surface area: 15.6 acres.
Is Ingerson Lake safe to swim in?
- Based on E. coli testing, Ingerson Lake occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 8.6% of 35 samples across 8 seasons. That is a historical summary of past bacteria testing, not a current reading and not a swimming clearance. Bacteria levels can spike quickly after heavy rain, so whether Ingerson Lake is safe to swim in today is a call for Michigan's water agency and the county health department; check their current beach advisories before you swim.
What is the water temperature of Ingerson Lake?
- Ingerson Lake typically sits around 54°F at the surface in October, from 679 EPA Water Quality Portal field readings (2012–2024). That is a typical value for the month, not a live reading.
Explore Ingerson Lake across LakeQuality
19.3 mi away · cable-pulled, no boat wake
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Where this data comes from
683 measurements from 1 monitoring station, 2016–2025. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Match-e-be-nash-she-wish Band of Pottawatomi Indians of Michigan (Gun Lake)
GNLK01_WQX683 samples · 2016–2025
Analytical methods
- 4500 P E ~ Phosphorus in Water by Colorimetry- Ascorbic Acid Method
- 10200 H ~ Chlorophyll a-b-c Determination
- Turbidity in Water
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)