Seetal Lake is a 14-acre mesotrophic lake in Gasconade County, Missouri. Water quality is graded B based on 3 sampling years through 2024. Overall water quality is improving over recent sampling years. Limited fish-species data available. Public access is available with 1 public boat landing. Compared to the 3 other monitored lakes in Gasconade County, Seetal Lake ranks #1 for water quality.
Source: EPA Water Quality Portal sampling records, Missouri DNR, last sampled 2024-09-11. Grade methodology: LakeGrade methodology.
Watch Seetal Lake water quality
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Swimming Safety
Good for swimming, clear water with low algae levels
Water Quality Grade: B, Good
Moderate clarity, visible to about 7.2 ft. Phosphorus level: 17 µg/L. Chlorophyll-a: 5.9 µg/L. Trophic State Index: 47.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 7.2 ft | C |
| Phosphorus | 17 µg/L | A |
| Chlorophyll-a (Algae) | 5.9 µg/L | B |
| Trophic State Index (TSI) | 47 | Mesotrophic |
Moderate nutrients, good water quality
Lake Details
| Characteristic | Value |
|---|---|
| Surface Area | 14 acres |
| Public Access | Yes |
Where to stay near Seetal Lake
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Fishing Seetal Lake
Water Quality Trend: ↑ Improving
Based on 4 years of monitoring data (2020-2025).
| Metric | Trend | Change/Year | Years |
|---|---|---|---|
| Water Clarity | → Stable | -0.041 m/yr | 4 |
| Phosphorus | ↑ Improving | -1.76 µg/L/yr | 4 |
| Chlorophyll-a | ↑ Improving | -1.3 µg/L/yr | 4 |
Recreation & Access
Water Temperature
Seetal Lake averages about 83°F at the surface in summer, usually warmest in Jul (about 85°F) and coldest in Apr (about 64°F). These are typical values by month — not a live reading.
Typical surface water temperature by month, from 15 field readings (2020–2024) via the EPA Water Quality Portal. See the full Seetal Lake water temperature breakdown →
Location
County Ranking
Ranked #1 of 4 lakes in Gasconade County
Cleaner Lakes Within 30 Miles
Seetal Lake holds Grade B. 2 nearby lakes hold higher grades.
- AAlpine LakeWarren County · 19.6 mi · Higher grade (B → A)
- BLake KonstanzWarren County · 20.2 mi · Higher overall water quality score
Nearby Lakes in Gasconade County
Explore Seetal Lake across LakeGrade
More Missouri Lake Rankings
Other Grade B Lakes in Missouri
Mesotrophic Lakes in Missouri
More records, surveys & data sources
Reservoir Info (USACE NID)
Seetal Lake is a man-made reservoir impounded by the See Tal Lake Dam (completed 1971), built primarily for recreation on the TR-FRENE CREEK; earth-type dam, 51 ft tall and 600 ft long.
- Surface area
- 14 ac
- Normal storage
- 158 ac-ft
- Max storage
- 232 ac-ft
- Drainage area
- 0.27 sq mi
- Hazard class
- High
- Owner
- SEE TAL PROPERTY OWNERS
Source: USACE National Inventory of Dams, NID ID MO30668 · Operator website
Regulated Pollution Sources Nearby
6 EPA-permitted facilities operate within about 5 miles of Seetal Lake under Clean Water Act (NPDES) discharge permits. 5 facilities have a reported Clean Water Act violation in the past three years.
- Hermann WwtfHermann · 1.5 mi away · NPDES MO0106585Recent violation
- Mckittrick BpMckittrick · 1.7 mi away · NPDES MO0138134Recent violation
- Hermann Industrial Tract LagoonHermann · 2.1 mi away · NPDES MO0116009Recent violation
- Bruche And Nachas WwtfBerger · 3.9 mi away · NPDES MO0103691Recent violation
- Rhineland WwtfRhineland · 4.8 mi away · NPDES MO0117013Recent violation
- Spg Laser Light Technologies LlcHermann · 1.9 mi away · NPDES MONX00938
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)
Grading methodology based on Metropolitan Council standards
Public boat-access points from the USGS National Boat Ramps inventory
Most recent sample: 2024-09-11
Monitoring stations: 2