Avenue of the Saints Lake
Bremer County, IowaView mapDirections
Iowa DNR publishes the water-quality measurements for Avenue of the Saints Lake. Here is what has been measured.
- Hypereutrophic
- Impaired · Algal growth
- Public access
Avenue of the Saints Lake in Bremer County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 1.2 ft visibility. Phosphorus: 174.5 µg/L. Chlorophyll-a (algae): 89.7 µg/L.
Free interactive depth-contour map of Avenue of the Saints Lake, reaching a maximum surveyed depth of 16 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Iowa DNR.
Avenue of the Saints Lake is a highly nutrient-loaded hypereutrophic lake in Bremer County, Iowa. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available.
Source: EPA Water Quality Portal sampling records, Iowa DNR, last sampled 2024-10-28. Methodology: how these readings are compared.
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. Avenue of the Saints Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, pH / acidity, turbidity. Check local advisories before you swim.
Whether Avenue of the Saints 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 Avenue of the Saints Lake
These are the measurements Iowa DNR publishes for Avenue of the Saints 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 1.2 ft of visibility. Phosphorus 174.5 µg/L. Chlorophyll-a 89.7 µg/L. TSI 76.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 1.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 175µg/L | Poor GoodFairPoor |
| Chlorophyll-a (algae) | 89.7µg/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. | 76 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Avenue of the Saints Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Avenue of the Saints Lake typically sits around 72°F at the surface in September. Summer average is about 77°F. Usually warmest in Jul (about 80°F) and coldest in May (about 62°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (62°F) to its warmest (80°F).
Typical surface water temperature by month, from 31 field readings (2010–2023) via the EPA Water Quality Portal. See the full Avenue of the Saints Lake water temperature breakdown →
Stays via Stay22
Stays near Avenue of the Saints Lake
Compare lakeside cabins, hotels, and vacation rentals near Avenue of the Saints Lake in Bremer 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 Avenue of the Saints Lake are listed below.
Top-rated places to stay near Avenue of the Saints Lake
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Fishing Avenue of the Saints Lake
Water Quality Trend: Improving
Based on 4 years of monitoring (2021–2024).
Water clarity
Improving4 years
Phosphorus
Improving-42.6 µg/L/yr4 years
Chlorophyll-a
Worsening+7.9 µg/L/yr4 years
EPA Impairment Status
Avenue of the Saints Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Aquatic life.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit IA 02-SHL-1790 · Official waterbody report
Regulated Pollution Sources Nearby
7 EPA-permitted facilities operate within about 5 miles of Avenue of the Saints Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 6 facilities have a reported Clean Water Act violation in the past three years.
- Waverly City Of StpWaverly · 3.8 mi away · NPDES IA0033197MajorRecent violation
- Shell Rock City Of StpShell Rock · 2.3 mi away · NPDES IA0033359Recent violation
- Wartburg CollegeWaverly · 3 mi away · NPDES IA0071714Recent violation
- Waverly Municipal Fire DepartmentWaverly · 3.4 mi away · NPDES IA0080268Recent violation
- Poet Biorefining - Shell Rock, LlcShell Rock · 4.4 mi away · NPDES IA0081272Recent violation
- Shell Rock Soy Processing LlcShell Rock · 4.6 mi away · NPDES IA0053366Recent 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.
Nearby Lakes in Bremer County
Frequently asked questions about Avenue of the Saints Lake
Where is Avenue of the Saints Lake?
- Avenue of the Saints Lake is a lake in Bremer County, Iowa. Its water-quality measurements are published by Iowa DNR and shown on this page as reported.
What is the water quality of Avenue of the Saints Lake?
- Avenue of the Saints Lake in Bremer County, Iowa has water-quality measurements published by Iowa DNR, shown here as reported. Water clarity: 1.2 ft visibility. Phosphorus: 174.5 µg/L. Chlorophyll-a (algae): 89.7 µg/L.
Is Avenue of the Saints Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Avenue of the Saints Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for algal growth, pH / acidity, turbidity. Check local advisories before you swim.
What is the water temperature of Avenue of the Saints Lake?
- Avenue of the Saints Lake typically sits around 72°F at the surface in September, from 31 EPA Water Quality Portal field readings (2010–2023). That is a typical value for the month, not a live reading.
Can I fish at Avenue of the Saints Lake?
- Public access to Avenue of the Saints Lake is listed as yes on the lake record. 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.
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Where this data comes from
66 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_WQX66 samples · 2021–2024
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)