Lake Lemon
Monroe County, Indiana1,650 acresView mapDirections
IDEM publishes the water-quality measurements for Lake Lemon. Here is what has been measured.
- Limited data
Lake Lemon in Monroe County, Indiana has water-quality measurements published by IDEM, shown here as reported. Water clarity: 2.1 ft visibility. Surface area: 1650 acres.
Lake Lemon is a 1,650-acre lake in Monroe County, Indiana. Overall water quality is declining over recent sampling years.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2023-07-26. Methodology: how these readings are compared.
Lake Lemon covers about 1,700 acres in Monroe County. If you are planning to stay, you can search lake houses and cabins around Lake Lemon on Vrbo, or look for a hotel room near the lake on Booking.com or Expedia.
What Lake Lemon is good for
From access and monitoring records, not editorial picks.
- Big water1,650 acres
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Lake Lemon is safe to swim in today is a call for the Indiana Department of Environmental Management and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Lake Lemon
These are the measurements IDEM publishes for Lake Lemon, 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 2.1 ft of visibility. TSI 66.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 2.1ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Lake Lemon
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
1,650 acres
No bathymetric survey has been published for Lake Lemon, so its depth is not documented here.
Stays via Stay22
Stays near Lake Lemon
Compare lakeside cabins, hotels, and vacation rentals near Lake Lemon in Monroe County, Indiana — 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.
Top-rated places to stay near Lake Lemon
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Follow Lake Lemon’s readings
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Fishing Lake Lemon
Water quality readings over time
2 seasons of samples on record (2020–2023). Calling a direction takes at least 4 years of the same measurement.
Water clarity
Worsening2 years
Reservoir Info (USACE NID)
Lake Lemon is a man-made reservoir impounded by the Lake Lemon Dam (completed 1952), built primarily for water supply on the BEANBLOSSOM CREEK; earth-type dam, 51 ft tall and 660 ft long.
- Surface area
- 1,650 ac
- Normal storage
- 13,300 ac-ft
- Max storage
- 45,700 ac-ft
- Drainage area
- 70.9 sq mi
- Hazard class
- High
- Owner
- Bob Madden
All listed purposes: Water Supply;Recreation.
Source: USACE National Inventory of Dams, NID ID IN00010 · Operator website
Regulated Pollution Sources Nearby
8 EPA-permitted facilities operate within about 5 miles of Lake Lemon under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Camp Gallahue WwtpFruitdale · 3.4 mi away · NPDES IN0053899Recent violation
- Lake Lemon North Shore Dredge Disposal ProjectUnionville · 1 mi away · NPDES INRA06482
- Lake Lemon Dredge DisposalUnionville · 1.2 mi away · NPDES INRA05878
- Lake Lemon Disposal BasinUnionville · 1.5 mi away · NPDES INRA07207
- Duke Energy Needmore Junction Substation RebuildNashville · 2.8 mi away · NPDES INRA06601
- Lutheran Hills CampTrevlac · 3.2 mi away · NPDES IN0039110
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 Monroe County
Frequently asked questions about Lake Lemon
Where is Lake Lemon?
- Lake Lemon is a lake in Monroe County, Indiana. Its water-quality measurements are published by IDEM and shown on this page as reported.
What is the water quality of Lake Lemon?
- Lake Lemon in Monroe County, Indiana has water-quality measurements published by IDEM, shown here as reported. Water clarity: 2.1 ft visibility. Surface area: 1650 acres.
Is Lake Lemon safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Lake Lemon across LakeQuality
Depth, room, public access, and the state wake-sport rules
Species activity outlook by water temperature and season
Where to stay at Indiana's top lakes, each with its readings
Indiana's cleanest lakes, ranked on agency measurements
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Where this data comes from
5 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- North American Lake Management Society
NALMS5 samples · 2023
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)