Tull Lake
Oakland County, Michigan81 acresView mapDirections
Nutrients and algae sit mid-range for this region.
- Eutrophic
- Impaired · Nutrients (phosphorus, nitrogen)
- #26 of 29 in the county
- Limited data
Tull Lake in Oakland County, Michigan has a water quality grade of C (Fair). Water clarity: 4.8 ft visibility. Phosphorus: 27 µg/L. Surface area: 81 acres.
- Clarity
- 4.8 ft
- Area
- 81 acres
- Type
- Eutrophic
- Trend
- → Stable
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Watch Tull Lake’s letter
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Free interactive depth-contour map of Tull Lake, reaching a maximum surveyed depth of 32 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Tull Lake is a 81-acre productive, nutrient-rich eutrophic lake in Oakland County, Michigan. Water quality is graded C based on 1 sampling years through 2023. Phosphorus level is declining over recent sampling years. The lake supports 1 documented fish species including Lake herring. Compared to the 28 other monitored lakes in Oakland County, Tull Lake ranks #26 for water quality.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-24. Grade methodology: LakeQuality methodology.
Swimming Safety
Grade onlyLimited data
Based on clarity and algae grades from past sampling — we do not hold live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.
The C is nutrients and algae, not a swimming clearance. Tull Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pesticides, pCBs. Check local advisories before you swim.
Water Quality Grade: C (Fair)
Murky, only visible to about 4.8 ft. Phosphorus 27 µg/L. TSI 53. The letter is not a swimming clearance.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 4.8 ft | Not graded |
| Phosphorus | 27 µg/L | Fair |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 81 acres |
No bathymetric survey has been published for Tull Lake, so its depth is not documented here.
Fish Species
Click a species to see every graded lake where it is documented.
Fishing Tull Lake
Water Quality Trend: → Stable
Based on 7 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.061 m/yr | 6 |
| Phosphorus | ↓ Declining | +0.83 µg/L/yr | 7 |
| Chlorophyll-a | ↑ Improving | -0.13 µg/L/yr | 7 |
Reservoir Info (USACE NID)
Tull Lake is a man-made reservoir impounded by the Tull Lake Dam, built primarily for recreation on the Huron River; earth-type dam, 16 ft tall and 150 ft long.
- Surface area
- 81 ac
- Normal storage
- 270 ac-ft
- Max storage
- 760 ac-ft
- Hazard class
- Low
- Owner
- Kelly Bros. Land Development Inc.
Source: USACE National Inventory of Dams, NID ID MI01717 · Operator website · Matched by proximity (0.24 km)
EPA Impairment Status
Tull Lake 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 MI040900050101-04 · Official waterbody report · Matched by proximity (1.97 km)
Regulated Pollution Sources Nearby
1 EPA-permitted facility operate within about 5 miles of Tull Lake under Clean Water Act (NPDES) discharge permits.
- Speedway Superamerica Sta 2223White Lake · 0.9 mi away · NPDES MIG081062
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.
County Ranking
Ranked #26 of 29 lakes in Oakland County
Nearby Lakes in Oakland County
Frequently asked questions about Tull Lake
Where is Tull Lake?
- Tull Lake is a lake in Oakland County, Michigan. LakeQuality grades it C for nutrients and algae. The letter is not a swimming clearance.
What is the water quality grade for Tull Lake?
- Tull Lake in Oakland County, Michigan has a water quality grade of C (Fair). Water clarity: 4.8 ft visibility. Phosphorus: 27 µg/L. Surface area: 81 acres.
Is Tull Lake safe to swim in?
- The C is nutrients and algae, not a swimming clearance. Tull Lake is listed impaired under Clean Water Act §303(d) (IR 5) for nutrients (phosphorus, nitrogen), pesticides, pCBs. Check local advisories before you swim.
What fish are in Tull Lake?
- Fish species found in Tull Lake include Lake herring. Tull Lake is located in Oakland County, Michigan.
Explore Tull Lake across LakeQuality
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Where this data comes from
53 measurements from 1 monitoring station, 2018–2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS53 samples · 2018–2023
Analytical methods
- Phosphorus by Colorimetry
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)