Kent Park Lake
Johnson County, Iowa29 acresView mapDirections
Clarity, phosphorus, and algae sit in the clean band for this region.
↑ up from C at the last regrade
- Eutrophic
- #1 of 3 in the county
Kent Park Lake in Johnson County, Iowa has a water quality grade of B (Good). Water clarity: 4.8 ft visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 11.4 µg/L. Surface area: 28.7 acres.
- Clarity
- 4.8 ft
- Typical in September
- 68°F
- Area
- 29 acres
- Type
- Eutrophic
- Phosphorus
- 25 µg/L
- Chlorophyll-a
- 11.4 µg/L
- Trend
- ↑ Improving
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Stays near Kent Park Lake
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Watch Kent Park Lake’s letter
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Free interactive depth-contour map of Kent Park Lake, reaching a maximum surveyed depth of 16 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Iowa DNR.
Kent Park Lake is a 29-acre productive, nutrient-rich eutrophic lake in Johnson County, Iowa. Water quality is graded B based on 2 sampling years through 2024. Overall water quality is improving over recent sampling years. Compared to the 2 other monitored lakes in Johnson County, Kent Park Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-08-26. Grade methodology: LakeQuality methodology.
What Kent Park Lake is good for
From access and monitoring records, not editorial picks.
- Camping1 public campground nearby
Swimming Safety
Grade onlyLow algae
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: B (Good)
Murky, only visible to about 4.8 ft. Phosphorus 25 µg/L. Chlorophyll-a 11.4 µg/L. TSI 53. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.8 ft | Not graded |
| Phosphorus | 25 µg/L | Good |
| Chlorophyll-a (Algae) | 11.4 µg/L | Good |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Kent Park Lake typically sits around 68°F at the surface in September. Summer average is about 80°F. Usually warmest in Jul (about 81°F) and coldest in Sep (about 68°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 29 field readings (2010–2023) via the EPA Water Quality Portal. See the full Kent Park Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 29 acres |
No bathymetric survey has been published for Kent Park Lake, so its depth is not documented here.
Recreation & Access
Public campgrounds near Kent Park Lake
- F W Kent County Park Campground1.1 km
Nearest public campgrounds in the USGS National Map inventory, within about 3 miles. An empty list means USGS records no campground that close, which is not the same as camping being unavailable. Where the source gives an official reservation link, it is used; the cabin and hotel search does not cover campsites. More camping lakes
Fishing Kent Park Lake
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.189 m/yr | 5 |
| Phosphorus | → Stable | -0.05 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -0.86 µg/L/yr | 5 |
Reservoir Info (USACE NID)
Kent Park Lake is a man-made reservoir impounded by the F.W.Kent Park Dam (completed 1972), built primarily for recreation on the TR-CLEAR CREEK; earth-type dam, 34 ft tall and 850 ft long.
- Surface area
- 28.7 ac
- Normal storage
- 224 ac-ft
- Max storage
- 336 ac-ft
- Drainage area
- 1.09 sq mi
- Hazard class
- Low
- Owner
- Johnson County Conservation Board
Source: USACE National Inventory of Dams, NID ID IA01324 · Operator website · Matched by proximity (0.07 km)
Regulated Pollution Sources Nearby
5 EPA-permitted facilities operate within about 5 miles of Kent Park Lake under Clean Water Act (NPDES) discharge permits. 5 facilities have a reported Clean Water Act violation in the past three years.
- Parkview Mobile Home CourtOxford · 1.1 mi away · NPDES IA0068349Recent violation
- Oxford City Of StpOxford · 2.8 mi away · NPDES IA0032531Recent violation
- Oxford Water Treatment PlantOxford · 3.6 mi away · NPDES IA0082252Recent violation
- Tiffin City Of StpTiffin · 4 mi away · NPDES IA0036617Recent violation
- Beyonder Getaway At Sleepy HollowOxford · 4.4 mi away · NPDES IA0069094Recent violation
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.
County Ranking
Ranked #1 of 3 lakes in Johnson County
Nearby Lakes in Johnson County
Frequently asked questions about Kent Park Lake
Where is Kent Park Lake?
- Kent Park Lake is a lake in Johnson County, Iowa. LakeQuality grades it B for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Kent Park Lake?
- Kent Park Lake in Johnson County, Iowa has a water quality grade of B (Good). Water clarity: 4.8 ft visibility. Phosphorus: 25 µg/L. Chlorophyll-a (algae): 11.4 µg/L. Surface area: 28.7 acres.
Is Kent Park Lake safe to swim in?
- The B is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Kent Park Lake?
- Kent Park Lake typically sits around 68°F at the surface in September, from 29 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.
Are there campgrounds on Kent Park Lake?
- Kent Park Lake has 1 public campground from USGS The National Map within 5 km, including F W Kent County Park Campground. This is a location join, not a booking. Cabins and hotels are listed separately; campsite reservations use the official link when the source provides one.
Explore Kent Park Lake across LakeQuality
More Iowa Lake Rankings
Other Grade B Lakes in Iowa
Eutrophic Lakes in Iowa
Where this data comes from
60 measurements from 1 monitoring station, 2020–2024. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Iowa DNR Surface Water Monitoring Data
21IOWA_WQX60 samples · 2020–2024
Analytical methods
- Unknown
- Phosphorus by Colorimetry
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
- In-Vitro Determination of Chlorophyll
- ISU modification of APHA 2130-B
Monitoring station identifiers (1)
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Public campgrounds from USGS The National Map Structures, within about 3 miles