Saint Croix Flowage
Saint Croix Flowage in Douglas County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2248 acres.
- Area
- 2,248 acres
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Why Saint Croix Flowage 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 Saint Croix Flowage, no water-quality sampling on record for this lake.
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.
Saint Croix Flowage is a 2,248-acre lake in Douglas County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
Watch Saint Croix Flowage water quality
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Swimming Safety
Not ratedElevated nutrients
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Saint Croix Flowage
These readings exist but are not enough for an A–F grade — see why.
No clarity data. Trophic State Index: undefined.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | No recent samples | |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) |
Where to stay near Saint Croix Flowage
Compare lakeside cabins, hotels, and vacation rentals near Saint Croix Flowage in Douglas 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 Saint Croix Flowage
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 2,248 acres |
No bathymetric survey has been published for Saint Croix Flowage, so its depth is not documented here.
Fishing Saint Croix Flowage
Nearby Lakes in Douglas County
Frequently asked questions about Saint Croix Flowage
Where is Saint Croix Flowage?
- Saint Croix Flowage is a lake in Douglas County, Wisconsin. LakeQuality has not rated this lake (UNRATED) — no water-quality sampling on record for this lake.
What is the water quality grade for Saint Croix Flowage?
- Saint Croix Flowage in Douglas County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 2248 acres.
Is Saint Croix Flowage safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Saint Croix Flowage is not rated for water quality — its monitoring record does not meet the evidence bar. Always check local health department advisories before swimming.
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Where this data comes from
Measurements for Saint Croix Flowage come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.