What is the water quality grade for Drexel City Reservoir South Nr. Dam?

Drexel City Reservoir South Nr. Dam in Bates County, Wisconsin received a water quality grade of F (Very Poor). Water clarity: 0.9 ft visibility. Phosphorus: 194 µg/L. Chlorophyll-a (algae): 152.7 µg/L. Surface area: 50 acres.

Is Drexel City Reservoir South Nr. Dam safe to swim in?

Avoid swimming, very poor water quality, potential algae toxins. Drexel City Reservoir South Nr. Dam has an overall water quality grade of F. Algae concentration (chlorophyll-a) is 152.7 µg/L. Always check local health department advisories before swimming.

Drexel City Reservoir South Nr. Dam

Bates County, WisconsinHypereutrophic

Drexel City Reservoir South Nr. Dam is a 50-acre highly nutrient-loaded hypereutrophic lake in Bates County, MO. Water quality is graded F based on 3 sampling years through 2020.

Source: EPA Water Quality Portal sampling records, local state DNR records, last sampled 2020-08-18. 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 0.9 ft of visibility. Phosphorus level: 194 µg/L. Chlorophyll-a: 152.7 µg/L. Trophic State Index: 80.

Metric	Value	Grade
Water Clarity (Secchi Depth)	0.9 ft	F
Phosphorus	194 µg/L	F
Chlorophyll-a (Algae)	152.7 µg/L	F
Trophic State Index (TSI)	80	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Lake Details

Characteristic	Value
Surface Area	50 acres

Location

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County Ranking

Ranked #1 of 1 lakes in Bates County

Cleaner Lakes Within 30 Miles

Drexel City Reservoir South Nr. Dam holds Grade F. 3 nearby lakes hold higher grades.

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Reservoir Info (USACE NID)

Drexel City Reservoir South Nr. Dam is a man-made reservoir impounded by the Drexel City Reservoir Dam South (completed 1968), built primarily for recreation on the TR-NORTH SUGAR CREEK; earth-type dam, 29 ft tall.

Surface area: 50 ac
Normal storage: 417 ac-ft
Max storage: 776 ac-ft
Drainage area: 550 sq mi
Hazard class: Low
Owner: CITY OF DREXEL

All listed purposes: Recreation;Water Supply.

Source: USACE National Inventory of Dams, NID ID MO20213 · Operator website · Matched by proximity (0.06 km)

EPA Impairment Status

Drexel City Reservoir South Nr. Dam is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).

Causes of impairment

Algal growth

Source: EPA ATTAINS assessment unit MO_7230.00 · Official waterbody report · Matched by proximity (0.35 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: 2020-08-18

Monitoring stations: 1