Mohawk Lake
Oakland County, Michigan370 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.
- Impaired · Pathogens (E. coli, fecal)
- 33 ft max depth
- Limited data
Mohawk Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11 ft visibility. Maximum depth: 33 ft. Surface area: 370 acres.
- Clarity
- 11 ft
- Typical in September
- 55°F
- Max depth
- 33 ft
- Area
- 370 acres
- Trend
- ↑ Improving
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Watch Mohawk Lake’s letter
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Free interactive depth-contour map of Mohawk Lake, reaching a maximum surveyed depth of 33 ft. Toggle Depth contours to overlay the bathymetric survey lines. Contour data from Michigan DNR.
Why Mohawk Lake has no grade
Mohawk 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, Mohawk Lake is Not Rated — not an F. Its 11-foot median from 19 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 EGLE and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Mohawk Lake is a 370-acre lake in Oakland County, Michigan with a maximum depth of 33 feet. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2023-09-11. Grade methodology: LakeQuality methodology.
What Mohawk Lake is good for
From access and monitoring records, not editorial picks.
- Clear water11 ft of visibility
- Deep water33 ft surveyed max depth
Swimming Safety
Not ratedBacteria advisory
The letter is not a swimming clearance. Mohawk Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
Water quality measurements for Mohawk Lake
These readings exist but are not enough for an A–F grade — see why.
Good clarity, visible to about 11 ft. TSI 43.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 11 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 43 | Mesotrophic |
Moderate nutrients, good water quality
Water Temperature
Mohawk Lake typically sits around 55°F at the surface in September. Summer average is about 54°F. Usually warmest in Aug (about 56°F) and coldest in May (about 49°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 1,291 field readings (2012–2018) via the EPA Water Quality Portal. See the full Mohawk Lake water temperature breakdown →
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | 33 ft |
| Surface Area | 370 acres |
Fishing Mohawk Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +0.26 m/yr | 4 |
| Phosphorus | ↓ Declining | +4 µg/L/yr | 3 |
| Chlorophyll-a | ↑ Improving | -0.15 µg/L/yr | 3 |
Reservoir Info (USACE NID)
Mohawk Lake is a man-made reservoir impounded by the Clintonville Dam (completed 1915), built primarily for recreation on the Clinton River; earth-type dam, 14 ft tall and 200 ft long.
- Surface area
- 370 ac
- Normal storage
- 2,400 ac-ft
- Max storage
- 3,900 ac-ft
- Drainage area
- 0 sq mi
- Hazard class
- Significant
- Owner
- Oakland County Drain Commissioner
Source: USACE National Inventory of Dams, NID ID MI00241 · Operator website · Matched by proximity (0.98 km)
EPA Impairment Status
Mohawk Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040900030103-05 · Official waterbody report · Matched by proximity (0.42 km)
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Mohawk Lake under Clean Water Act (NPDES) discharge permits.
- Mlc-Fiero SitePontiac · 2.9 mi away · NPDES MI0058796
- Gm - Pontiac Sw FacilityPontiac · 3.1 mi away · NPDES MI0058908
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 Mohawk Lake
Mohawk Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Oakland County
Frequently asked questions about Mohawk Lake
Where is Mohawk Lake?
- Mohawk Lake is a lake in Oakland 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 Mohawk Lake?
- Mohawk Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 11 ft visibility. Maximum depth: 33 ft. Surface area: 370 acres.
Is Mohawk Lake safe to swim in?
- The letter is not a swimming clearance. Mohawk Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for pathogens (E. coli, fecal). Check local advisories before you swim.
What is the water temperature of Mohawk Lake?
- Mohawk Lake typically sits around 55°F at the surface in September, from 1,291 EPA Water Quality Portal field readings (2012–2018). That is a typical value for the month, not a live reading.
How deep is Mohawk Lake?
- Mohawk Lake has a maximum depth of 33 feet. The lake covers 370 acres.
Explore Mohawk Lake across LakeQuality
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Where this data comes from
19 measurements from 1 monitoring station, 2023. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- Michigan EGLE - MiCorps
21MICH_MICORPS19 samples · 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)