Upper Long Lake
Oakland County, Michigan130 acresView mapDirections
EGLE publishes the water-quality measurements for Upper Long Lake. Here is what has been measured.
- Limited data
Upper Long Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 8 ft visibility. Surface area: 129.5 acres.
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. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Upper Long Lake is safe to swim in today is a call for the Michigan Department of Environment, Great Lakes, and Energy (EGLE) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Upper Long Lake
These are the measurements EGLE publishes for Upper Long Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
Moderate clarity, visible to about 8 ft. TSI 47.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 8ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | No reading The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. | |
| Chlorophyll-a (algae) | No reading The green pigment in algae — a direct measure of how much algae is in the water. | |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 47 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Upper Long Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
130 acres
No bathymetric survey has been published for Upper Long Lake, so its depth is not documented here.
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 Oct 23–25, 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 →
Follow Upper Long Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Upper Long Lake
Water Quality Trend: Improving
Based on 5 years of monitoring (2018–2023).
Water clarity
Improving5 years
Phosphorus
Improving-0.5 µg/L/yr4 years
Chlorophyll-a
Worsening+0.05 µg/L/yr3 years
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.
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. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Upper Long Lake?
- Upper Long Lake in Oakland County, Michigan has water-quality measurements published by EGLE, shown here as reported. Water clarity: 8 ft visibility. Surface area: 129.5 acres.
Is Upper Long Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Explore Upper Long Lake across LakeQuality
Fish species and the cleanest 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 readings
Michigan's cleanest lakes, ranked on agency measurements
More lakes in Michigan
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)
EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.
Other records on this page
Regulated discharger data from EPA ECHO (ICIS-NPDES)