O'Rourke Lake
Otsego County, Michigan36 acresView mapDirections
EGLE publishes the water-quality measurements for O'Rourke Lake. Here is what has been measured.
- Public access
- Limited data
O'Rourke Lake in Otsego County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 15.5 ft visibility. Surface area: 35.7 acres.
O'Rourke Lake is a 36-acre lake in Otsego County, Michigan. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-17. Methodology: how these readings are compared.
What O'Rourke Lake is good for
From access and monitoring records, not editorial picks.
- Clear water15.5 ft of visibility
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether O'Rourke 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 O'Rourke Lake
These are the measurements EGLE publishes for O'Rourke Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Crystal clear, you can see 15.5 ft down. TSI 38.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 15.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| 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. | 38 | Oligotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Low nutrients, clear water. No reading is a swimming clearance.
Ask about O'Rourke Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
36 acres
Public access
Yes
Listed by EGLE
No bathymetric survey has been published for O'Rourke Lake, so its depth is not documented here.
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Fishing O'Rourke Lake
Water quality readings over time
2 seasons of samples on record (2022–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Improving2 years
Phosphorus
Improving-1 µg/L/yr2 years
Nearby Lakes in Otsego County
Frequently asked questions about O'Rourke Lake
Where is O'Rourke Lake?
- O'Rourke Lake is a lake in Otsego County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of O'Rourke Lake?
- O'Rourke Lake in Otsego County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 15.5 ft visibility. Surface area: 35.7 acres.
Is O'Rourke Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Can I fish at O'Rourke Lake?
- Public access to O'Rourke 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.
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Where this data comes from
21 measurements from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS21 samples · 2022
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.