Linn County, Iowa · Water Quality Report Card
Pleasant Creek Beach Lake
Pleasant Creek Beach Lake in Linn County, Iowa is not rated for water quality — its monitoring record does not meet the evidence bar.
- Mean depth
- ~14 ft est.
- Trend
- → Stable
Pleasant Creek Beach Lake is a lake in Linn County, Iowa with an estimated average depth of about 14 feet. Phosphorus level is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-08-21. Grade methodology: LakeGrade methodology.
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Swimming Safety
Based on E. coli testing, Pleasant Creek Beach Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 13.8% of 87 samples across 6 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 | ~14 ft est. |
Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Iowa has not published bathymetry for Pleasant Creek Beach Lake.
Where to stay near Pleasant Creek Beach Lake
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Fishing Pleasant Creek Beach Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | +0.02 m/yr | 5 |
| Phosphorus | ↓ Declining | +38.97 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -3.63 µg/L/yr | 5 |
Location
Nearby Lakes in Linn County
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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
41 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_WQX41 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: 2024-08-21
Monitoring stations: 1