Sprague-Mather Flowage
Sprague-Mather Flowage in Juneau County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 325 acres.
- Area
- 325 acres
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Why Sprague-Mather 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 Sprague-Mather 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.
Sprague-Mather Flowage is a 325-acre lake in Juneau County, Wisconsin.
Source: EPA Water Quality Portal sampling records, Wisconsin DNR Surface Water, last sampled recent years. Grade methodology: LakeQuality methodology.
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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 Sprague-Mather 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 Sprague-Mather Flowage
Compare lakeside cabins, hotels, and vacation rentals near Sprague-Mather Flowage in Juneau 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.
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Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 325 acres |
No bathymetric survey has been published for Sprague-Mather Flowage, so its depth is not documented here.
Fishing Sprague-Mather Flowage
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Frequently asked questions about Sprague-Mather Flowage
Where is Sprague-Mather Flowage?
- Sprague-Mather Flowage is a lake in Juneau 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 Sprague-Mather Flowage?
- Sprague-Mather Flowage in Juneau County, Wisconsin is not rated for water quality — its monitoring record does not meet the evidence bar. Surface area: 325 acres.
Is Sprague-Mather Flowage safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Sprague-Mather 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 Sprague-Mather Flowage come from the EPA Water Quality Portal. Per-sample source details are not recorded for this lake.