Iowa Lkt Lake
Iowa County, Iowa92 acresView mapDirections
Iowa DNR publishes the water-quality measurements for Iowa Lkt Lake. Here is what has been measured.
- Impaired · Algal growth
- Limited data
Iowa Lkt Lake in Iowa County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 3.7 ft visibility. Surface area: 92 acres.
Iowa Lkt Lake is a 92-acre lake in Iowa County, Iowa. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2023-10-04. Methodology: how these readings are compared.
Swimming conditions
No readingBacteria advisory
Nutrient and algae readings are not a swimming clearance. Iowa Lkt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, pathogens (E. coli, fecal). Check local advisories before you swim.
Whether Iowa Lkt Lake 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 Iowa Lkt Lake
These are the measurements Iowa DNR publishes for Iowa Lkt Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Murky, only visible to about 3.7 ft. TSI 58.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 3.7ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading 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. | 58 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Iowa Lkt Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
92 acres
No bathymetric survey has been published for Iowa Lkt Lake, so its depth is not documented here.
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Fishing Iowa Lkt Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Improving-3.2 µg/L/yr4 years
Chlorophyll-a
Worsening+3.42 µg/L/yr5 years
Reservoir Info (USACE NID)
Iowa Lkt Lake is a man-made reservoir impounded by the Lake Iowa Dam (completed 1962), built primarily for recreation on the PIG CREEK; earth-type dam, 40 ft tall and 893 ft long.
- Surface area
- 92 ac
- Normal storage
- 1,110 ac-ft
- Max storage
- 1,950 ac-ft
- Drainage area
- 2.17 sq mi
- Hazard class
- Significant
- Owner
- Iowa County Conservation Board
Source: USACE National Inventory of Dams, NID ID IA00520 · Operator website · Matched by proximity (0.23 km)
EPA Impairment Status
Iowa Lkt Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Recreation.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-IOW-677 · Official waterbody report
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Iowa Lkt Lake under Clean Water Act (NPDES) discharge permits.
- Millersburg City Of (Poweshiek Water Assn)North English · 4.2 mi away · NPDES IA0077283
Facilities permitted to discharge under the Clean Water Act within ~5 miles; proximity does not by itself mean a facility affects this lake. Source: EPA ECHO (ICIS-NPDES), as of 2026-07.
Nearby Lakes in Iowa County
Frequently asked questions about Iowa Lkt Lake
Where is Iowa Lkt Lake?
- Iowa Lkt Lake is a lake in Iowa County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Iowa Lkt Lake?
- Iowa Lkt Lake in Iowa County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 3.7 ft visibility. Surface area: 92 acres.
Is Iowa Lkt Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Iowa Lkt Lake is listed impaired under Clean Water Act §303(d) (IR 5) for algal growth, mercury, pathogens (E. coli, fecal). Check local advisories before you swim.
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Where this data comes from
2 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Iowa DNR Surface Water Monitoring Data
21IOWA_WQX2 samples · 2023
Analytical methods
- Unknown
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)