What is the water quality grade for Lamar City Lk. Up Northern Arm Lake?

Lamar City Lk. Up Northern Arm Lake in Barton County, Wisconsin received a water quality grade of F (Very Poor). Water clarity: 1.8 ft visibility. Phosphorus: 78 µg/L. Chlorophyll-a (algae): 46.3 µg/L.

Is Lamar City Lk. Up Northern Arm Lake safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Lamar City Lk. Up Northern Arm Lake has an overall water quality grade of F. Algae concentration (chlorophyll-a) is 46.3 µg/L. Always check local health department advisories before swimming.

Lamar City Lk. Up Northern Arm Lake

Barton County, WisconsinEutrophic

Lamar City Lk. Up Northern Arm Lake is a productive, nutrient-rich eutrophic lake in Barton County, MO. Water quality is graded F based on 3 sampling years through 2020. Compared to the 5 other monitored lakes in Barton County, Lamar City Lk. Up Northern Arm Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2020-11-04. Grade methodology: LakeGrade methodology.

Swimming Safety

Avoid swimming, very poor water quality, potential algae toxins

Water Quality Grade: F, Very Poor

Very murky, less than 1.8 ft of visibility. Phosphorus level: 78 µg/L. Chlorophyll-a: 46.3 µg/L. Trophic State Index: 68.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.8 ft	F
Phosphorus	78 µg/L	D
Chlorophyll-a (Algae)	46.3 µg/L	F
Trophic State Index (TSI)	68	Eutrophic

High nutrients, frequent algae, reduced clarity

Location

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County Ranking

Ranked #5 of 6 lakes in Barton County

Cleaner Lakes Within 30 Miles

Lamar City Lk. Up Northern Arm Lake holds Grade F. 2 nearby lakes hold higher grades.

See full comparison →

Nearby Lakes in Barton County

Lamar City Lk. Nr. Dam Lake

Barton County

Lamar City Lk. W of Se 30th Ln Lake

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Lamar City Lk. East Arm Lake

Barton County

Lamar City Lk. South Arm Lake

Barton County

Lamar City Lk. Nr. Upper End Lake

Barton County

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Other Grade F Lakes in Wisconsin

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Lake St. Louis by Dam

St. Charles County · Clarity: 2.3 ft

Hemitite Lake

St. Francois County · Clarity: 1.1 ft

Blind Pony Lake

Saline County · Clarity: 2.3 ft

Stockton Lake Upstream of Hwy 123 Bridge

Polk County · Clarity: 1.2 ft

Eutrophic Lakes in Wisconsin

Aspen Lake Along Southern Arm Boathouse Lake Hunnewell Lake Long Branch Lk. Lake

EPA Impairment Status

Lamar City Lk. Up Northern Arm Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 4A).

Causes of impairment

Nutrients (phosphorus, nitrogen)

A Total Maximum Daily Load (TMDL) plan has been approved.

Source: EPA ATTAINS assessment unit MO_7356.00 · Official waterbody report · Matched by proximity (0.29 km)

Data Sources

Water quality data from the EPA Water Quality Portal

Impairment status from EPA ATTAINS 303(d) database

Grading methodology based on Metropolitan Council standards

Most recent sample: 2020-11-04

Monitoring stations: 1