Center Lake
Kosciusko County, IndianaView mapDirections
Not Rated: one monitoring station are on record, but they measured water clarity only. LakeQuality’s A–F method grades total phosphorus, total nitrogen, chlorophyll-a, and turbidity; clarity is shown, not scored.
- Impaired · Nutrients (phosphorus, nitrogen)
- 34 ft max depth
- Limited data
Center Lake in Kosciusko County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.7 ft visibility.
- Clarity
- 8.7 ft
- Max depth
- ~34 ft est.
- Trend
- → Stable
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Watch Center Lake’s letter
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Why Center Lake has no grade
Center Lake has monitoring on record from one station, but only water clarity was measured. LakeQuality’s A–F letter uses total phosphorus, total nitrogen, chlorophyll-a, and turbidity against EPA National Lakes Assessment condition classes. With none of those grading measurements on record, Center Lake is Not Rated — not an F. Its 8.7-foot median from 11 readings collected 2021 is still shown as clarity, but clarity alone cannot earn a letter.
Not Rated is EPA Integrated Reporting Category 3 — insufficient information. Everything below that has been measured is still reported on this page.
Sampling is run by IDEM and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Center Lake is a lake in Kosciusko County, Indiana with an estimated average depth of about 34 feet. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2021-08-09. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedBacteria D
Based on E. coli testing, Center Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 20.8% of 24 samples across 3 seasons.
This is a historical summary of past testing, not a current condition — bacteria levels change quickly, especially after rain. Always check Indiana’s current beach and health-department advisories before swimming.
Water quality measurements for Center Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8.7 ft. TSI 46.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8.7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 46 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~34 ft est. |
| Average Depth | ~10 ft est. |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Indiana has not published bathymetry for 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 Center Lake
Water Quality Trend: → Stable
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.066 m/yr | 5 |
| Phosphorus | ↓ Declining | +6.27 µg/L/yr | 5 |
| Chlorophyll-a | → Stable | -0.05 µg/L/yr | 5 |
EPA Impairment Status
Center Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
Source: EPA ATTAINS assessment unit INB06P1008_00 · Official waterbody report
Regulated Pollution Sources Nearby
47 EPA-permitted facilities operate within about 5 miles of Center Lake under Clean Water Act (NPDES) discharge permits, including 3 classified by the EPA as major dischargers. 7 facilities have a reported Clean Water Act violation in the past three years.
- Warsaw WwtpWarsaw · 1.3 mi away · NPDES IN0060917MajorRecent violation
- Phoenix Warsaw Industrial Investors LlcWarsaw · 2.1 mi away · NPDES IN0003387MajorRecent violation
- Warsaw #1 WwtpWarsaw · 0.9 mi away · NPDES IN0024805Major
- Warsaw Foundry Company, Inc.Warsaw · 0.3 mi away · NPDES IN0063487Recent violation
- Zimmer Biomet Incorporated Corporate Office BuildingWarsaw · 0.6 mi away · NPDES IN0064907Recent violation
- Zimmer Manufacturing Building 19Warsaw · 1.3 mi away · NPDES IN0064909Recent 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 Kosciusko County
Frequently asked questions about Center Lake
Where is Center Lake?
- Center Lake is a lake in Kosciusko County, Indiana. LakeQuality has not rated this lake (UNRATED) — the only measurement available is water clarity, which is not a water-quality indicator on its own — EPA's National Lakes Assessment does not grade clarity.
What is the water quality grade for Center Lake?
- Center Lake in Kosciusko County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8.7 ft visibility.
Is Center Lake safe to swim in?
- Based on E. coli testing, Center Lake frequently exceeded the EPA safe-swimming threshold (235 MPN/100mL) — on 20.8% of 24 samples across 3 seasons. That works out to a bacteria swim-safety grade of D — a historical summary of past testing, not a current reading. Center Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Bacteria levels can spike quickly after heavy rain, so always check Indiana's current beach and health-department advisories before you swim.
How deep is Center Lake?
- No published bathymetric survey covers Center Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 34 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate.
Explore Center Lake across LakeQuality
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Where this data comes from
11 measurements from 1 monitoring station, 2021. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS11 samples · 2021
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)