Second Sister Lake
Washtenaw County, Michigan8 acresView mapDirections
No nutrient or algae sampling on record from EGLE for this lake.
- Impaired · Mercury
- Limited data
Second Sister Lake in Washtenaw County, Michigan has water-quality measurements published by EGLE, shown here as reported. Surface area: 8.1 acres.
Second Sister Lake is a 8-acre lake in Washtenaw County, Michigan. The lake supports 3 documented fish species including Bluegill, Green sunfish, and Yellow bullhead.
Source: EPA Water Quality Portal sampling records, EGLE, last sampled 2022-03-20. Methodology: how these readings are compared.
What Second Sister Lake is good for
From access and monitoring records, not editorial picks.
- Fishing3 species recorded
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Second Sister Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
Whether Second Sister 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 Second Sister Lake
These are the measurements EGLE publishes for Second Sister Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.
No clarity data.
Ask about Second Sister Lake
Answers come straight from the public measurements and survey records on this page.
Lake Details
Surface area
8 acres
No bathymetric survey has been published for Second Sister Lake, so its depth is not documented here.
Stays via Stay22
Stays near Second Sister Lake
Compare lakeside cabins, hotels, and vacation rentals near Second Sister Lake in Washtenaw 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 Second Sister Lake
Prices for Oct 30–Nov 1, 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 Second Sister Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fish Species
Click a species to see every lake where it is documented.
Fishing Second Sister Lake
EPA Impairment Status
Second Sister Lake is officially listed as impaired under Clean Water Act §303(d) in the 2024 EPA reporting cycle (IR category 4A).
Causes of impairment
Designated uses not supporting: Fish consumption.
A Total Maximum Daily Load (TMDL) plan has been approved.
Source: EPA ATTAINS assessment unit MI040900050308-02 · Official waterbody report
Regulated Pollution Sources Nearby
15 EPA-permitted facilities operate within about 5 miles of Second Sister Lake under Clean Water Act (NPDES) discharge permits. 8 facilities have a reported Clean Water Act violation in the past three years.
- Gelman Sciences Llc - Wagner RdAnn Arbor · 0.3 mi away · NPDES MI0048453Recent violation
- Washtenaw Cdc MS4Ann Arbor · 2.6 mi away · NPDES MI0059599Recent violation
- Honey Creek Development WwtpAnn Arbor · 3 mi away · NPDES MI0058169Recent violation
- Lake Forest GolfAnn Arbor · 3.4 mi away · NPDES MIG580015Recent violation
- Ntn Technical CenterAnn Arbor · 3.9 mi away · NPDES MIG250419Recent violation
- Thetford Llc-DexterDexter · 4.4 mi away · NPDES MI0036951Recent violation
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 Washtenaw County
Frequently asked questions about Second Sister Lake
Where is Second Sister Lake?
- Second Sister Lake is a lake in Washtenaw County, Michigan. Its water-quality measurements are published by EGLE and shown on this page as reported.
What is the water quality of Second Sister Lake?
- Second Sister Lake in Washtenaw County, Michigan has water-quality measurements published by EGLE, shown here as reported. Surface area: 8.1 acres.
Is Second Sister Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Second Sister Lake is listed impaired under Clean Water Act §303(d) (IR 4A) for mercury. Check local advisories before you swim.
What fish are in Second Sister Lake?
- Fish species found in Second Sister Lake include Bluegill, Green sunfish, Yellow bullhead. Second Sister Lake is located in Washtenaw County, Michigan.
Explore Second Sister Lake across LakeQuality
Fish species and the cleanest lakes across Michigan
Fish species and best lakes in Washtenaw 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
Where this data comes from
1 measurement from 1 monitoring station, 2022. Retrieved from the EPA Water Quality Portal on 2026-08-26.
Collected and reported by
- North American Lake Management Society
NALMS1 sample · 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
Impairment status from EPA ATTAINS 303(d) database
Regulated discharger data from EPA ECHO (ICIS-NPDES)