Hooper Pond Lake
Warren County, Iowa45 acresView mapDirections
Iowa DNR publishes the water-quality measurements for Hooper Pond Lake. Here is what has been measured.
- Eutrophic
- 22 ft max depth
- Public access
Hooper Pond Lake in Warren County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 2.5 ft visibility. Phosphorus: 61 µg/L. Chlorophyll-a (algae): 25.1 µg/L. Surface area: 44.8 acres.
Free interactive depth-contour map of Hooper Pond Lake, reaching a maximum surveyed depth of 18 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Iowa DNR.
Hooper Pond Lake is a 45-acre productive, nutrient-rich eutrophic lake in Warren County, Iowa with an estimated average depth of about 22 feet. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 1 other monitored lakes in Warren County, Hooper Pond Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-09-18. Methodology: how these readings are compared.
What Hooper Pond Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming conditions
Readings onlyAlgae risk
Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Hooper Pond 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 Hooper Pond Lake
These are the measurements Iowa DNR publishes for Hooper Pond Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Very murky, less than 2.5 ft of visibility. Phosphorus 61 µg/L. Chlorophyll-a 25.1 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.5ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 61µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 25.1µg/L | Poor GoodFairPoor |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 63 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Hooper Pond Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Hooper Pond Lake typically sits around 75°F at the surface in September. Summer average is about 79°F. Usually warmest in Jul (about 82°F) and coldest in May (about 69°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (69°F) to its warmest (82°F).
Typical surface water temperature by month, from 29 field readings (2010–2023) via the EPA Water Quality Portal. See the full Hooper Pond Lake water temperature breakdown →
Lake Details
Max depth
~22 ft est.
Surface area
45 acres
Public access
Yes
Listed by Iowa DNR
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Iowa has not published bathymetry for Hooper Pond Lake.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
0.9 mi
HydroLAKES / HydroSHEDS
Elevation
876 ft
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.
Recreation & Access
- Hooper Wildlife AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Stays via Stay22
Stays near Hooper Pond Lake
Compare lakeside cabins, hotels, and vacation rentals near Hooper Pond Lake in Warren 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. The water-quality readings cover nutrients and algae, not lodging. Cabins and rentals around Hooper Pond Lake are listed below.
Top-rated places to stay near Hooper Pond Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Planning a whole trip? See where to stay at Iowa’s top lakes →
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Fishing Hooper Pond Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2020–2024).
Water clarity
Improving5 years
Phosphorus
Stable+0.55 µg/L/yr4 years
Chlorophyll-a
Improving-7.28 µg/L/yr5 years
Reservoir Info (USACE NID)
Hooper Pond Lake is a man-made reservoir impounded by the Hooper Dam (completed 1996), built primarily for recreation on the TR- SQUAW CREEK; earth-type dam, 37 ft tall and 900 ft long.
- Surface area
- 44.8 ac
- Normal storage
- 418 ac-ft
- Max storage
- 879 ac-ft
- Drainage area
- 2.23 sq mi
- Hazard class
- Significant
- Owner
- Iowa Department of Natural Resources
Source: USACE National Inventory of Dams, NID ID IA03101 · Operator website
Nearby Lakes in Warren County
Frequently asked questions about Hooper Pond Lake
Where is Hooper Pond Lake?
- Hooper Pond Lake is a lake in Warren County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Hooper Pond Lake?
- Hooper Pond Lake in Warren County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 2.5 ft visibility. Phosphorus: 61 µg/L. Chlorophyll-a (algae): 25.1 µg/L. Surface area: 44.8 acres.
Is Hooper Pond Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Hooper Pond Lake?
- Hooper Pond Lake typically sits around 75°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.
How deep is Hooper Pond Lake?
- No published bathymetric survey covers Hooper Pond Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 22 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 44.8 acres.
Are there boat ramps on Hooper Pond Lake?
- Hooper Pond Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Hooper Wildlife Area. Public access is listed as yes.
Can I fish at Hooper Pond Lake?
- Hooper Pond Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Seasons, size and bag limits, and whether you need a license are set by Iowa's fish and wildlife agency, so check its current regulations before you go.
Explore Hooper Pond Lake across LakeQuality
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Where this data comes from
59 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_WQX59 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)
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
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory