Sandstone Flowage Lake
Sandstone Flowage Lake in Marinette County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.5 ft visibility.
- Clarity
- 5.5 ft
- Public access
- Yes
Next lake in Marinette County
Swipe left or right on this bar to open the next or previous lake.
Why Sandstone Flowage Lake has no grade
We grade a lake only when the monitoring record supports a letter: at least three phosphorus or chlorophyll-a samples in the last ten years, scored against EPA National Lakes Assessment thresholds for this lake’s ecoregion. For Sandstone Flowage Lake, 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. Sampling here has recorded water clarity, but not phosphorus and algae (chlorophyll-a).
Not Rated is not an F. It is EPA Integrated Reporting Category 3 — insufficient information. The water here may be excellent or poor; nobody has measured enough of it to say. Everything below that has been measured is still reported on this page.
Sampling is run by WI DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Sandstone Flowage Lake is a lake in Marinette County, Wisconsin. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled 2025-09-01. Grade methodology: LakeQuality methodology.
Watch Sandstone Flowage Lake water quality
Subscribe for LakeQuality updates by email. No spam, unsubscribe anytime.
Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Sandstone Flowage Lake
These readings exist but are not enough for an A–F grade — see why.
Murky, only visible to about 5.5 ft. Trophic State Index: 53.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 5.5 ft | Not graded |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 53 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Sandstone Flowage Lake
Compare lakeside cabins, hotels, and vacation rentals near Sandstone Flowage Lake in Marinette County, Wisconsin — 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 Sandstone Flowage Lake
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 Wisconsin’s top lakes →
Recreation & Access
- Sandstone FlowagePublic
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Sandstone Flowage Lake
Regulated Pollution Sources Nearby
2 EPA-permitted facilities operate within about 5 miles of Sandstone Flowage Lake under Clean Water Act (NPDES) discharge permits. 1 facility has a reported Clean Water Act violation in the past three years.
- Crivitz Wastewater Treatment FacilityCrivitz · 4 mi away · NPDES WI0060372Recent violation
- Wi Dnr Thunder River Rearing StationCrivitz · 3.2 mi away · NPDES WI0022713
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 Sandstone Flowage Lake
Sandstone Flowage Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Marinette County
Frequently asked questions about Sandstone Flowage Lake
Where is Sandstone Flowage Lake?
- Sandstone Flowage Lake is a lake in Marinette County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — there is not enough recent sampling to assign a letter.
What is the water quality grade for Sandstone Flowage Lake?
- Sandstone Flowage Lake in Marinette County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 5.5 ft visibility.
Is Sandstone Flowage Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Sandstone Flowage Lake is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
Are there boat ramps on Sandstone Flowage Lake?
- Sandstone Flowage Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Sandstone Flowage. Public access is listed as yes.
Explore Sandstone Flowage Lake across LakeQuality
Fish species and top-graded lakes across Wisconsin
Fish species and best lakes in Marinette County
Species activity outlook by water temperature and season
Where to stay at Wisconsin's top lakes, each with its grade
Wisconsin's cleanest and most-polluted lakes, ranked
More Wisconsin Lake Rankings
State Parks Near Sandstone Flowage Lake
Other Lakes in Wisconsin
Eutrophic Lakes in Wisconsin
Where this data comes from
12 measurements from 1 monitoring station, 2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Wisconsin Department of Natural Resources
WIDNR_WQX12 samples · 2025
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
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Named boat-access points from the USGS National Boat Ramps inventory