Upper Long Lake
Oakland County, Michigan130 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)
- Limited data
Upper Long Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Surface area: 129.5 acres.
- Clarity
- 8 ft
- Area
- 130 acres
- Trend
- ↑ Improving
Stays via Stay22
Stays near Upper Long Lake
Compare lakeside cabins, hotels, and vacation rentals near Upper Long Lake in Oakland County, Michigan — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Upper Long Lake
Prices for Sep 11–13, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Michigan’s top lakes →
Watch Upper Long Lake’s letter
Email me if this lake’s grade moves. Grades stay free.
Or email
Why Upper Long Lake has no grade
Upper Long 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, Upper Long Lake is Not Rated — not an F. Its 8-foot median from 43 readings collected 2018–2022 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.
Upper Long Lake is a 130-acre lake in Oakland County, Michigan. Overall water quality is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-09-18. Grade methodology: LakeQuality methodology.
Swimming Safety
Not ratedBacteria advisory
The letter is not a swimming clearance. Upper Long Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pathogens (E. coli, fecal). Check local advisories before you swim.
Water quality measurements for Upper Long Lake
These readings exist but are not enough for an A–F grade — see why.
Moderate clarity, visible to about 8 ft. TSI 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 8 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 130 acres |
No bathymetric survey has been published for Upper Long Lake, so its depth is not documented here.
Fishing Upper Long Lake
Invasive & Introduced Species
Red chips are ecologically harmful invasive species. Gray chips are stocked or introduced fish that aren't a current ecological concern.
Source: USGS Nonindigenous Aquatic Species (NAS) Database. Hover a chip to see scientific name, ecological context, status, and first-observed year.
Water Quality Trend: ↑ Improving
Based on 5 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | ↑ Improving | +2.837 m/yr | 5 |
| Phosphorus | ↑ Improving | -0.5 µg/L/yr | 4 |
| Chlorophyll-a | ↓ Declining | +0.05 µg/L/yr | 3 |
EPA Impairment Status
Upper Long 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 MI040900040401-12 · Official waterbody report · Matched by proximity (0.55 km)
Regulated Pollution Sources Nearby
5 EPA-permitted facilities operate within about 5 miles of Upper Long Lake under Clean Water Act (NPDES) discharge permits. 3 facilities have a reported Clean Water Act violation in the past three years.
- Bloomfield Hills Ps MS4-OaklandBloomfield Hills · 2.1 mi away · NPDES MI0060026Recent violation
- Bloomfield Twp MS4-OaklandBloomfield Hills · 2.3 mi away · NPDES MI0059974Recent violation
- Franklin MS4-OaklandFranklin · 4.9 mi away · NPDES MI0059959Recent violation
- Bloomfield Twp-SwmaBloomfield Hills · 2.3 mi away · NPDES MIG610026
- City Of Bloomfield HillsBloomfield Hills · 4.2 mi away · NPDES MI0025461
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 Upper Long Lake
Upper Long Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Oakland County
Frequently asked questions about Upper Long Lake
Where is Upper Long Lake?
- Upper Long 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 Upper Long Lake?
- Upper Long Lake in Oakland County, Michigan is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 8 ft visibility. Surface area: 129.5 acres.
Is Upper Long Lake safe to swim in?
- The letter is not a swimming clearance. Upper Long Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pathogens (E. coli, fecal). Check local advisories before you swim.
Explore Upper Long Lake across LakeQuality
Fish species and top-graded lakes across Michigan
Fish species and best lakes in Oakland County
Species activity outlook by water temperature and season
Where to stay at Michigan's top lakes, each with its grade
Michigan's cleanest and most-polluted lakes, ranked
More Michigan Lake Rankings
Other Lakes in Michigan
Mesotrophic Lakes in Michigan
Where this data comes from
43 measurements from 1 monitoring station, 2018–2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS43 samples · 2018–2022
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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)