Teal Lake is a 78-acre highly nutrient-loaded hypereutrophic lake in Audrain County, Missouri. Water quality is graded F based on 3 sampling years through 2020. Limited fish-species data available. Public access is available with 2 public boat landings. Compared to the 3 other monitored lakes in Audrain County, Teal Lake ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-07-22. Grade methodology: LakeGrade methodology.
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Swimming Safety
Avoid swimming, very poor water quality, potential algae toxins
Water Quality Grade: F, Very Poor
Very murky, less than 2 ft of visibility. Phosphorus level: 109 µg/L. Chlorophyll-a: 97.7 µg/L. Trophic State Index: 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | F |
| Phosphorus | 109 µg/L | F |
| Chlorophyll-a (Algae) | 97.7 µg/L | F |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 78 acres |
| Public Access | Yes |
Where to stay near Teal Lake
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Fishing Teal Lake
Recreation & Access
Location
County Ranking
Ranked #4 of 4 lakes in Audrain County
Cleaner Lakes Within 30 Miles
Teal Lake holds Grade F. 5 nearby lakes hold higher grades.
- AOasis Ranch Upper LakeAudrain County · 5.8 mi · Two grade letters higher (F → A)
- AOasis Ranch LakeAudrain County · 5.9 mi · Two grade letters higher (F → A)
- CCrow PondCallaway County · 19.4 mi · Two grade letters higher (F → C)
- DTri City LakeBoone County · 18.1 mi · Higher grade (F → D)
- FMark Twain LakeMonroe County · 20.8 mi · Higher overall water quality score
Nearby Lakes in Audrain County
Explore Teal Lake across LakeGrade
Species activity outlook by water temperature and season
Where to stay at Missouri's top lakes, each with its grade
Very high nutrients, dense algae, poor clarity
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More Missouri Lake Rankings
Other Grade F Lakes in Missouri
Hypereutrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Teal Lake is a man-made reservoir impounded by the Teal Lake Dam (completed 1969), built primarily for recreation on the TR-SOUTH FORK SALT RIVER; rockfill-type dam, 20 ft tall.
- Surface area
- 78 ac
- Normal storage
- 179 ac-ft
- Max storage
- 835 ac-ft
- Drainage area
- 3,387 sq mi
- Hazard class
- High
- Owner
- A P GREEN REFRACTORY CO
Source: USACE National Inventory of Dams, NID ID MO10082 · Operator website
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth is a modeled estimate.
Regulated Pollution Sources Nearby
16 EPA-permitted facilities operate within about 5 miles of Teal Lake under Clean Water Act (NPDES) discharge permits, including 1 classified by the EPA as major discharger. 10 facilities have a reported Clean Water Act violation in the past three years.
- Mexico WwtpMexico · 2 mi away · NPDES MO0036242MajorRecent violation
- Lakeside Estates WwtfMexico · 2.4 mi away · NPDES MO0113948Recent violation
- On Pointe Living WwtfMexico · 2.4 mi away · NPDES MO0054038Recent violation
- South Syde Estates Mhp WwtfMexico · 2.6 mi away · NPDES MO0083585Recent violation
- Lance L Cox WwtfMexico · 3 mi away · NPDES MO0106542Recent violation
- Sunset Hills Mhp WwtfMexico · 3 mi away · NPDES MO0127833Recent violation
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.
Data Sources
Water quality data from the EPA Water Quality Portal
Regulated discharger data from EPA ECHO (ICIS-NPDES)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2020-07-22
Monitoring stations: 1