Oatman Lake
Kalamazoo County, Michigan6 acresView mapDirections
EGLE publishes the water-quality measurements for Oatman Lake. Here is what has been measured.
- Limited data
Oatman Lake in Kalamazoo County, Michigan has water-quality measurements published by EGLE, shown here as reported. Phosphorus: 82 µg/L. Surface area: 5.9 acres.
Oatman Lake is a 6-acre lake in Kalamazoo County, Michigan. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-24. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Oatman 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 Oatman Lake
These are the measurements EGLE publishes for Oatman Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data. Phosphorus 82 µg/L. TSI 68.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 82µg/L | Measured, not scored 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. | 68 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Oatman Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
6 acres
No bathymetric survey has been published for Oatman Lake, so its depth is not documented here.
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Fishing Oatman 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.
Phosphorus
Worsening+30 µg/L/yr2 years
Nearby Lakes in Kalamazoo County
Frequently asked questions about Oatman Lake
Where is Oatman Lake?
- Oatman Lake is a lake in Kalamazoo County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Oatman Lake?
- Oatman Lake in Kalamazoo County, Michigan has water-quality measurements published by EGLE, shown here as reported. Phosphorus: 82 µg/L. Surface area: 5.9 acres.
Is Oatman Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
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Where this data comes from
4 measurements from 1 monitoring station, 2022–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS4 samples · 2022–2023
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.