Bennett Lake; Deep Basin; Deerfield Township is a mesotrophic lake in Livingston County, Michigan. Water quality is graded C based on 1 sampling years through 2023. The lake supports 1 documented fish species including Lake herring. Compared to the 19 other monitored lakes in Livingston County, Bennett Lake; Deep Basin; Deerfield Township ranks #18 for water quality.
Source: EPA Water Quality Portal sampling records, Michigan DNR, last sampled 2023-09-15. Grade methodology: LakeGrade methodology.
Watch Bennett Lake; Deep Basin; Deerfield Township water quality
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Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Moderate clarity, visible to about 9.5 ft. Trophic State Index: 45.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 9.5 ft | C |
| Phosphorus | No data | |
| Chlorophyll-a (Algae) | No data | |
| Trophic State Index (TSI) | 45 | Mesotrophic |
Moderate nutrients, good water quality
Where to stay near Bennett Lake; Deep Basin; Deerfield Township
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Fish Species
Click a species to see every graded lake where it is documented.
Fishing Bennett Lake; Deep Basin; Deerfield Township
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- → Is it safe to eat fish from Bennett Lake; Deep Basin; Deerfield Township? (mercury & PFAS guide)
Location & Depth Map
Free interactive depth-contour map of Bennett Lake; Deep Basin; Deerfield Township, reaching a maximum surveyed depth of 58 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
County Ranking
Ranked #18 of 20 lakes in Livingston County
Nearby Lakes in Livingston County
Explore Bennett Lake; Deep Basin; Deerfield Township across LakeGrade
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Livingston County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Moderate nutrients, good water quality
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Other Grade C Lakes in Michigan
Genesee County · Clarity: 9 ft
Shiawassee County · Clarity: 5 ft
Shiawassee County · Clarity: 8 ft
Shiawassee County · Clarity: 6 ft
Genesee County · Clarity: 1.8 ft
Genesee County · Clarity: 3.8 ft
Mesotrophic Lakes in Michigan
More records, surveys & data sources
EPA Impairment Status
Bennett Lake; Deep Basin; Deerfield Township is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 5).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040802030109-06 · Official waterbody report · Matched by proximity (0.77 km)
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Bennett Lake; Deep Basin; Deerfield Township under Clean Water Act (NPDES) discharge permits.
- Tyrone Twp WwtpFenton · 2.7 mi away · NPDES MI0056642
- Laier Farms IncHowell · 4 mi away · NPDES MIG440023
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Most recent sample: 2023-09-15
Monitoring stations: 1