Kinmundy New Lake
Marion County, Illinois100 acresView mapDirections
Illinois EPA publishes the water-quality measurements for Kinmundy New Lake. Here is what has been measured.
- Hypereutrophic
- 38 ft max depth
- Public access
- Limited data
Kinmundy New Lake in Marion County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 2.9 ft visibility. Phosphorus: 49.5 µg/L. Chlorophyll-a (algae): 38 µg/L. Surface area: 100 acres.
Kinmundy New Lake is a 100-acre highly nutrient-loaded hypereutrophic lake in Marion County, Illinois with an estimated average depth of about 38 feet. Limited fish-species data available. Public access is available. Compared to the 5 other monitored lakes in Marion County, Kinmundy New Lake ranks #6 for water quality.
Source: EPA Water Quality Portal sampling records, Illinois EPA, last sampled 2022-10-12. Methodology: how these readings are compared.
Swimming conditions
Readings onlyLimited data
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 Kinmundy New Lake is safe to swim in today is a call for the Illinois Environmental Protection Agency and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Kinmundy New Lake
These are the measurements Illinois EPA publishes for Kinmundy New 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 2.9 ft of visibility. Phosphorus 49.5 µg/L. Chlorophyll-a 38 µg/L. TSI 63.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.9ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 49.5µg/L | Fair GoodFairPoor |
| Chlorophyll-a (algae) | 38µg/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 | Hypereutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Very high nutrients, dense algae, poor clarity
Ask about Kinmundy New Lake
Answers come straight from the public measurements and survey records on this page.
Water Temperature
Kinmundy New Lake typically sits around 62°F at the surface in October. Summer average is about 77°F. Usually warmest in Aug (about 79°F) and coldest in Apr (about 60°F). These are typical values by month — not a live reading.
Column height runs from this lake’s coldest month (60°F) to its warmest (79°F).
Typical surface water temperature by month, from 410 field readings (2010–2022) via the EPA Water Quality Portal. See the full Kinmundy New Lake water temperature breakdown →
Lake Details
Max depth
~38 ft est.
Surface area
100 acres
Public access
Yes
Listed by Illinois EPA
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Illinois has not published bathymetry for Kinmundy New Lake.
Lake Size & Watershed
Watershed (drainage) area
2 sq mi
HydroLAKES / HydroSHEDS
Shoreline
1.4 mi
HydroLAKES / HydroSHEDS
Elevation
561 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.
Stays via Stay22
Stays near Kinmundy New Lake
Compare lakeside cabins, hotels, and vacation rentals near Kinmundy New Lake in Marion 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 readings cover nutrients and algae, not lodging. Cabins and rentals around Kinmundy New Lake are listed below.
Top-rated places to stay near Kinmundy New Lake
Prices for Oct 23–25, 4 adults. Change dates on the map below.
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Fishing Kinmundy New Lake
Reservoir Info (USACE NID)
Kinmundy New Lake is a man-made reservoir impounded by the Kinmundy New Lake Dam (completed 1998), built primarily for recreation on the TRIB EAST FORK KASKASKIA RIVER; earth-type dam, 38 ft tall and 1,250 ft long.
- Surface area
- 100 ac
- Normal storage
- 1,192 ac-ft
- Max storage
- 2,250 ac-ft
- Drainage area
- 1.91 sq mi
- Hazard class
- High
- Owner
- CITY OF KINMUNDY
All listed purposes: Recreation;Water Supply.
Source: USACE National Inventory of Dams, NID ID IL50271 · Operator website
Nearby Lakes in Marion County
Frequently asked questions about Kinmundy New Lake
Where is Kinmundy New Lake?
- Kinmundy New Lake is a lake in Marion County, Illinois. Its water-quality measurements are published by Illinois EPA and shown on this page as reported.
What is the water quality of Kinmundy New Lake?
- Kinmundy New Lake in Marion County, Illinois has water-quality measurements published by Illinois EPA, shown here as reported. Water clarity: 2.9 ft visibility. Phosphorus: 49.5 µg/L. Chlorophyll-a (algae): 38 µg/L. Surface area: 100 acres.
Is Kinmundy New 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 Kinmundy New Lake?
- Kinmundy New Lake typically sits around 62°F at the surface in October, from 410 EPA Water Quality Portal field readings (2010–2022). That is a typical value for the month, not a live reading.
How deep is Kinmundy New Lake?
- No published bathymetric survey covers Kinmundy New Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 38 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 100 acres.
Can I fish at Kinmundy New Lake?
- Public access to Kinmundy New Lake is listed as yes on the lake record. Seasons, size and bag limits, and whether you need a license are set by Illinois's fish and wildlife agency, so check its current regulations before you go.
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Where this data comes from
42 measurements from 3 monitoring stations, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- illinois epa
IL_EPA_WQX42 samples · 2022
Analytical methods
- MEASURED IN FIELD
- Phosphorus by Colorimetry
- 10200 H 2 ~ Chlorophyll a-b-c Determination by spectrophotometer
Monitoring station identifiers (3)
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)