Cerro Gordo County, Iowa · Water Quality Report Card
Mcintosh Woods Beach Lake
Mcintosh Woods Beach Lake in Cerro Gordo County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar.
- Mean depth
- ~20 ft est.
Mcintosh Woods Beach Lake is a lake in Cerro Gordo County, Iowa with an estimated average depth of about 20 feet.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-08-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Based on E. coli testing, Mcintosh Woods Beach Lake routinely exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 30.6% of 134 samples across 7 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Iowa’s current beach and health-department advisories before swimming.
Water Quality Grade: Not rated
No clarity data.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No data | |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data |
Lake Details
| Characteristic | Value |
|---|---|
| Average Depth | ~20 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Iowa has not published bathymetry for Mcintosh Woods Beach Lake.
Where to stay near Mcintosh Woods Beach Lake
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Fishing Mcintosh Woods Beach Lake
Location
Nearby Lakes in Cerro Gordo County
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More records, surveys & data sources
EPA Impairment Status
Mcintosh Woods Beach Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-WIN-841 · Official waterbody report · Matched by proximity (2.42 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Where this data comes from
44 measurements from 1 monitoring station, 2021–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Iowa DNR Surface Water Monitoring Data
21IOWA_WQX44 samples · 2021–2024
Analytical methods
- 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)
Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2024-08-27
Monitoring stations: 1