Mark Twain Lake Indian Creek Arm
Ralls County, WisconsinEutrophic
Mark Twain Lake Indian Creek Arm is a productive, nutrient-rich eutrophic lake in Ralls County, MO. Water quality is graded C based on 3 sampling years through 2024. Compared to the 3 other monitored lakes in Ralls County, Mark Twain Lake Indian Creek Arm ranks #2 for water quality.
Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2024-08-31. Grade methodology: LakeGrade methodology.
Swimming Safety
Generally safe for swimming, moderate water quality
Water Quality Grade: C, Fair
Murky, only visible to about 3.8 ft. Phosphorus level: 31.5 µg/L. Chlorophyll-a: 14.2 µg/L. Trophic State Index: 56.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 3.8 ft | D |
| Phosphorus | 31.5 µg/L | C |
| Chlorophyll-a (Algae) | 14.2 µg/L | C |
| Trophic State Index (TSI) | 56 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Location
County Ranking
Ranked #2 of 4 lakes in Ralls County
Nearby Lakes in Ralls County
More Wisconsin Lake Rankings
Other Grade C Lakes in Wisconsin
Warren County · Clarity: 3.8 ft
Warren County · Clarity: 3.3 ft
Platte County · Clarity: 4.7 ft
Barry County · Clarity: 5 ft
Phelps County · Clarity: 4.9 ft
Randolph County · Clarity: 3.6 ft
Eutrophic Lakes in Wisconsin
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2024-08-31
Monitoring stations: 1