Geode Lake Beach
Henry County, IowaView mapDirections
No nutrient or algae sampling on record from Iowa DNR for this lake.
- Limited data
Geode Lake Beach in Henry County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported.
Geode Lake Beach is a lake in Henry County, Iowa. Phosphorus level is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-08-28. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria tested: exceedances
Based on E. coli testing, Geode Lake Beach occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 8.9% of 45 samples across 3 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.
Whether Geode Lake Beach is safe to swim in today is a call for the Iowa Department of Natural Resources and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Geode Lake Beach
These are the measurements Iowa DNR publishes for Geode Lake Beach, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Geode Lake Beach
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Geode Lake Beach
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Fishing Geode Lake Beach
Water Quality Trend: Stable
Based on 4 years of monitoring (2021–2024).
Water clarity
Stable4 years
Phosphorus
Improving-11.85 µg/L/yr4 years
Chlorophyll-a
Worsening+10.4 µg/L/yr4 years
Nearby Lakes in Henry County
Frequently asked questions about Geode Lake Beach
Where is Geode Lake Beach?
- Geode Lake Beach is a lake in Henry County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Geode Lake Beach?
- Geode Lake Beach in Henry County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported.
Is Geode Lake Beach safe to swim in?
- Based on E. coli testing, Geode Lake Beach occasionally exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 8.9% of 45 samples across 3 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 Geode Lake Beach is safe to swim in today is a call for Iowa's water agency and the county health department; check their current beach advisories before you swim.
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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)
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.