Teal Lake
Audrain County, Missouri78 acresView mapDirections
Not enough samples to grade — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). No letter yet. Here is what we do have.
- 34 ft max depth
- Public access
- Limited data
Teal Lake in Audrain County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2 ft visibility. Phosphorus: 109 µg/L. Chlorophyll-a (algae): 97.7 µg/L. Surface area: 78 acres.
- Clarity
- 2 ft
- Max depth
- ~34 ft est.
- Area
- 78 acres
- Public access
- Yes
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Watch Teal Lake’s letter
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Why Teal Lake has no grade
We grade a lake only when the monitoring record supports a letter: 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 Teal Lake, no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years). Sampling here has recorded water clarity, phosphorus 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 Missouri DNR and volunteer programs, and published through the EPA Water Quality Portal. Read the full grading methodology.
Teal Lake is a 78-acre lake in Audrain County, Missouri with an estimated average depth of about 34 feet. Limited fish-species data available. Public access is available with 1 public boat landing.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2020-07-22. Grade methodology: LakeQuality methodology.
What Teal Lake is good for
From access and monitoring records, not editorial picks.
- Boat launch1 documented ramp
Swimming Safety
Not ratedLimited data
The letter is not a swimming clearance. Check local advisories before you swim.
Water quality measurements for Teal Lake
These readings exist but are not enough for an A–F grade — see why.
Very murky, less than 2 ft of visibility. Phosphorus 109 µg/L. Chlorophyll-a 97.7 µg/L. TSI 71.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 2 ft | Not graded |
| Phosphorus | 109 µg/L | Not graded |
| Chlorophyll-a (Algae) | 97.7 µg/L | Not graded |
| Trophic State Index (TSI) | 71 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Lake Details
| Characteristic | Value |
|---|---|
| Maximum Depth | ~34 ft est. |
| Average Depth | ~13 ft est. |
| Surface Area | 78 acres |
| Public Access | Yes |
Depth marked “est.” is a modeled maximum from GLOBathy (Khazaei et al. 2022, CC0), not a measured survey. Missouri has not published bathymetry for Teal Lake.
Lake Size & Watershed
Size, shoreline, and watershed area from HydroLAKES (HydroSHEDS). Mean depth here is modelled, not surveyed — HydroLAKES v1.0 estimates lake depth from surrounding terrain rather than from soundings. Treat it as an approximation, and prefer a state bathymetric survey where one exists.
Recreation & Access
- Teal Lake (Mexico)Public
Named access points in the USGS National Boat Ramps inventory, within about 3 miles. More lakes with boat ramps
Fishing Teal Lake
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
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.
Graded lakes near Teal Lake
Teal Lake has no grade, but these lakes within a short drive do.
Nearby Lakes in Audrain County
Frequently asked questions about Teal Lake
Where is Teal Lake?
- Teal Lake is a lake in Audrain County, Missouri. LakeQuality has not rated this lake (UNRATED) — no nutrient or algae measurement meets the evidence bar (at least 3 samples within 10 years).
What is the water quality grade for Teal Lake?
- Teal Lake in Audrain County, Missouri is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 2 ft visibility. Phosphorus: 109 µg/L. Chlorophyll-a (algae): 97.7 µg/L. Surface area: 78 acres.
Is Teal Lake safe to swim in?
- The letter is not a swimming clearance. Check local advisories before you swim.
How deep is Teal Lake?
- No published bathymetric survey covers Teal Lake, so its depth has not been measured. The HydroLAKES global model estimates an average depth of about 34 feet, but that is a modelled estimate derived from surrounding terrain rather than a measurement on the water, so treat it as approximate. The lake covers 78 acres.
Are there boat ramps on Teal Lake?
- Teal Lake has 1 documented boat landing in the USGS National Boat Ramps inventory. Named access points include Teal Lake (Mexico). Public access is listed as yes.
Explore Teal Lake across LakeQuality
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Where this data comes from
3 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- Missouri Dept. of Natural Resources
MDNR3 samples · 2020
Analytical methods
- Depth, Secchi disk in meters
- Nitrogen and Phosphorus, Total, Whole-water, Alkaline Persulfate Digest
- 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
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)
Lake size & watershed from HydroLAKES (HydroSHEDS)
Named boat-access points from the USGS National Boat Ramps inventory