Lower Sioux Hank Lake
Lower Sioux Hank Lake in Redwood County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 300 µg/L.
- Trend
- ↓ Declining
- Public access
- Yes
Next lake in Redwood County
Why Lower Sioux Hank Lake has no grade
We grade a lake only when its monitoring record clears the evidence bar: 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 Lower Sioux Hank Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded phosphorus, but not water clarity 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 MPCA and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Lower Sioux Hank Lake is a lake in Redwood County, Minnesota. Overall water quality is declining over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Minnesota DNR LakeFinder, last sampled 2025-10-01. Grade methodology: LakeGrade methodology.
Watch Lower Sioux Hank Lake water quality
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for Lower Sioux Hank Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 300 µg/L. Trophic State Index: 86.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 300 µg/L | Not graded |
| Chlorophyll-a (Algae) | No recent samples | |
| Trophic State Index (TSI) | 86 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lower Sioux Hank Lake
Compare lakeside cabins, hotels, and vacation rentals near Lower Sioux Hank Lake in Redwood County, Minnesota — 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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Recreation & Access
- MortonPublic
Fishing Lower Sioux Hank Lake
Water Quality Trend: ↓ Declining
Based on 2 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Phosphorus | ↓ Declining | +99.27 µg/L/yr | 2 |
Regulated Pollution Sources Nearby
3 EPA-permitted facilities operate within about 5 miles of Lower Sioux Hank Lake under Clean Water Act (NPDES) discharge permits. 2 facilities have a reported Clean Water Act violation in the past three years.
- Morton WwtpMorton · 0.9 mi away · NPDES MN0051292Recent violation
- Lower Sioux WwslRedwood Falls · 1.5 mi away · NPDES MN0061433Recent violation
- Redwood Falls Kaolin MineRedwood County · 3.8 mi away · NPDES MN0059331
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 Lower Sioux Hank Lake
Lower Sioux Hank Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Redwood County
Frequently asked questions about Lower Sioux Hank Lake
What is the water quality grade for Lower Sioux Hank Lake?
- Lower Sioux Hank Lake in Redwood County, Minnesota is not rated for water quality — its monitoring record does not meet the evidence bar. Phosphorus: 300 µg/L.
Is Lower Sioux Hank Lake safe to swim in?
- Not rated for swimming — there is not enough monitoring data to judge this lake. Lower Sioux Hank 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 Lower Sioux Hank Lake?
- Lower Sioux Hank Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Morton. Public access is listed as yes.
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Where this data comes from
4 measurements from 1 monitoring station, 2022–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Lower Sioux Indian Community (Tribal)
LSIOUX_WQX4 samples · 2022–2025
Analytical methods
- Phosphorus by Colorimetry
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