Cerro Gordo County, Iowa · Water Quality Report Card
Clear Lake State Park Beach
Clear Lake State Park Beach 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.
Clear Lake State Park Beach 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, Clear Lake State Park Beach frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 17.3% of 104 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 Clear Lake State Park Beach.
Where to stay near Clear Lake State Park Beach
Compare lakeside cabins, hotels, and vacation rentals near Clear Lake State Park Beach in Cerro Gordo County, Iowa — 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.
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Fishing Clear Lake State Park Beach
Location
Nearby Lakes in Cerro Gordo County
Explore Clear Lake State Park Beach across LakeGrade
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More records, surveys & data sources
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
43 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_WQX43 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
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