Pleasant Lake
Washtenaw County, Michigan196 acresView 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.
- 36 ft max depth
- Limited data
Pleasant Lake in Washtenaw County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.5 ft visibility. Maximum depth: 36 ft. Surface area: 195.7 acres.
- Clarity
- 7.5 ft
- Max depth
- 36 ft
- Area
- 196 acres
- Trend
- ↓ Declining
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Watch Pleasant Lake’s letter
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Why Pleasant Lake has no grade
Pleasant 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, Pleasant Lake is Not Rated — not an F. Its 7.5-foot median from 221 readings collected 2016–2022 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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Pleasant Lake is a 196-acre lake in Washtenaw County, Michigan with a maximum depth of 36 feet. Overall water quality is declining over recent sampling years. The lake supports 1 documented fish species including Largemouth bass.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-12. Grade methodology: LakeQuality methodology.
What Pleasant Lake is good for
From access and monitoring records, not editorial picks.
- Deep water36 ft surveyed max depth
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Pleasant Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 7.5 ft. TSI 48.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 48 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 36 ft |
| Surface Area | 196 acres |
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Pleasant Lake
Water Quality Trend: ↓ Declining
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.03 m/yr | 7 |
| Phosphorus | ↓ Declining | +0.95 µg/L/yr | 5 |
| Chlorophyll-a | ↓ Declining | +0.78 µg/L/yr | 7 |
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Pleasant Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Bridgewater Twp WwtpSaline · 4.3 mi away · NPDES MI0057118Recent 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.
Graded lakes near Pleasant Lake
Pleasant Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Washtenaw County
Frequently asked questions about Pleasant Lake
Where is Pleasant Lake?
- Pleasant Lake is a lake in Washtenaw County, Michigan. 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 Pleasant Lake?
- Pleasant Lake in Washtenaw County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 7.5 ft visibility. Maximum depth: 36 ft. Surface area: 195.7 acres.
Is Pleasant Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Pleasant Lake?
- Pleasant Lake has a maximum depth of 36 feet. The lake covers 195.7 acres.
What fish are in Pleasant Lake?
- Fish species found in Pleasant Lake include Largemouth bass. Pleasant Lake is located in Washtenaw County, Michigan.
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Where this data comes from
221 measurements from 1 monitoring station, 2016–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS221 samples · 2016–2022
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)