Monroe Lake
Monroe 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.
- Public access
- Limited data
Monroe Lake in Monroe County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.7 ft visibility.
- Clarity
- 5.7 ft
- Public access
- Yes
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Watch Monroe Lake’s letter
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Why Monroe Lake has no grade
Monroe 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, Monroe Lake is Not Rated — not an F. Its 5.7-foot median from 8 readings collected 2023 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.
Monroe Lake is a lake in Monroe County, Indiana. Limited fish-species data available. Public access is available with 3 public boat landings.
Source: EPA Water Quality Portal sampling records, IDEM, last sampled 2023-07-26. Grade methodology: LakeQuality methodology.
What Monroe Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch3 documented ramps
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Monroe Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5.7 ft. TSI 52.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.7 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 52 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Current Conditions
USGS snapshot Jul 6, 2026, 4:25 AM from gauge 03372400 (Monroe Lake Near Harrodsburg, IN). Station page ↗ — a live reading replaces this snapshot when the gauge responds. Missing live data is not an all-clear.
Recreation & Access
- CutrightPublic
- Moores CreekPublic
- Pine Grove State Recreation AreaPublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Monroe Lake
Regulated Pollution Sources Nearby
10 EPA-permitted facilities operate within about 5 miles of Monroe Lake under Clean Water Act (NPDES) discharge permits. 3 facilities have a reported Clean Water Act violation in the past three years.
- Paynetown Sra WwtpBloomington · 1.8 mi away · NPDES IN0030163Recent violation
- Monroe County WtpBloomington · 2 mi away · NPDES IN0060810Recent violation
- Salt Creek Services IncMonroe County · 3.8 mi away · NPDES IN0043699Recent violation
- Ransburg Scout ReservationBloomington · 0.4 mi away · NPDES IN0045411
- Home Bank Of SaratogaPlainfield · 1 mi away · NPDES INR10M994
- South Central Indiana Rsd Stinesville WwtpStinesville · 1.4 mi away · NPDES IN0050105
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 Monroe Lake
Where is Monroe Lake?
- Monroe Lake is a lake in Monroe 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 Monroe Lake?
- Monroe Lake in Monroe County, Indiana is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.7 ft visibility.
Is Monroe Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
What is the water level at Monroe Lake?
- The USGS snapshot on this page for Monroe Lake is 549.96 ft of water-surface elevation, recorded Jul 6, 2026, 4:25 AM at gauge 03372400. Current Conditions hydrates a live NWIS reading from that same station when the gauge responds. A missed live fetch is not an all-clear.
Are there boat ramps on Monroe Lake?
- Monroe Lake has 3 documented boat landings in the USGS National Boat Ramps inventory. Named access points include Cutright, Moores Creek, Pine Grove State Recreation Area. Public access is listed as yes.
Explore Monroe Lake 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 grade
Indiana's cleanest and most-polluted lakes, ranked
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Where this data comes from
8 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
NALMS8 samples · 2023
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory