Vienna Correctional Center Lake
Johnson County, Illinois74 acresView mapDirections
Nutrients and algae run above the regional average.
↓ down from C at the last regrade
- Eutrophic
- #1 of 2 in the county
- 23 ft max depth
- Limited data
Vienna Correctional Center Lake in Johnson County, Illinois has a water quality grade of D (Nutrient-rich). Water clarity: 4.5 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 26.2 µg/L. Surface area: 74 acres.
- Clarity
- 4.5 ft
- Typical in September
- 78°F
- Max depth
- ~23 ft est.
- Area
- 74 acres
- Type
- Eutrophic
- Phosphorus
- 22 µg/L
- Chlorophyll-a
- 26.2 µg/L
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Stays near Vienna Correctional Center Lake
Compare lakeside cabins, hotels, and vacation rentals near Vienna Correctional Center Lake in Johnson County, Illinois — 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 grade measures nutrients and algae, not lodging — cabins and rentals around Vienna Correctional Center Lake are listed below.
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Vienna Correctional Center Lake is a 74-acre productive, nutrient-rich eutrophic lake in Johnson County, Illinois with an estimated average depth of about 23 feet. Water quality is graded D based on 2 sampling years through 2020. Compared to the 1 other monitored lakes in Johnson County, Vienna Correctional Center Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2020-11-05. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
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 D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
Water Quality Grade: D (Nutrient-rich)
Murky, only visible to about 4.5 ft. Phosphorus 22 µg/L. Chlorophyll-a 26.2 µg/L. TSI 56. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.5 ft | Not graded |
| Phosphorus | 22 µg/L | Fair |
| Chlorophyll-a (Algae) | 26.2 µg/L | Poor |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Water Temperature
Vienna Correctional Center Lake typically sits around 78°F at the surface in September. Summer average is about 77°F. Usually warmest in Aug (about 79°F) and coldest in Dec (about 48°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 361 field readings (2010–2022) via the EPA Water Quality Portal. See the full Vienna Correctional Center Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~23 ft est. |
| Average Depth | ~12 ft est. |
| Surface Area | 74 acres |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Illinois has not published bathymetry for Vienna Correctional Center Lake.
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.
Fishing Vienna Correctional Center Lake
Reservoir Info (USACE NID)
Vienna Correctional Center Lake is a man-made reservoir impounded by the Vienna Correctional Center Lake Dam (completed 1964), built primarily for recreation on the TRIB BAY CREEK; earth-type dam, 29 ft tall and 680 ft long.
- Surface area
- 74 ac
- Normal storage
- 558 ac-ft
- Max storage
- 1,169 ac-ft
- Drainage area
- 1.5 sq mi
- Hazard class
- Low
- Owner
- ILLINOIS DEPARTMENT OF CORRECTIONS
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID IL00028 · Operator website
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Vienna Correctional Center Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Vienna Correctional Center StpVienna · 0.3 mi away · NPDES IL0036757Recent violation
- Patrician Of Vienna Inc StpVienna · 3.2 mi away · NPDES IL0053660
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 2 lakes in Johnson County
Nearby Lakes in Johnson County
Frequently asked questions about Vienna Correctional Center Lake
Where is Vienna Correctional Center Lake?
- Vienna Correctional Center Lake is a lake in Johnson County, Illinois. LakeQuality grades it D for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Vienna Correctional Center Lake?
- Vienna Correctional Center Lake in Johnson County, Illinois has a water quality grade of D (Nutrient-rich). Water clarity: 4.5 ft visibility. Phosphorus: 22 µg/L. Chlorophyll-a (algae): 26.2 µg/L. Surface area: 74 acres.
Is Vienna Correctional Center Lake safe to swim in?
- The D is nutrients and algae, not a swimming clearance. Check local advisories before you swim.
What is the water temperature of Vienna Correctional Center Lake?
- Vienna Correctional Center Lake typically sits around 78°F at the surface in September, from 361 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
How deep is Vienna Correctional Center Lake?
- No published bathymetric survey covers Vienna Correctional Center Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 23 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 74 acres.
Explore Vienna Correctional Center Lake across LakeQuality
12.6 mi away · 100 ft
Species activity outlook by water temperature and season
Where to stay at Illinois's top lakes, each with its grade
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Where this data comes from
56 measurements from 3 monitoring stations, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- illinois epa
IL_EPA_WQX56 samples · 2020
Analytical methods
- MEASURED IN FIELD
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
Monitoring station identifiers (3)
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)