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LakeQuality

Bryan County, Texas · Water Quality Report Card

Lake Texoma Off Shore Zm Site

Grade Not rated
Limited DataEutrophic

Lake Texoma Off Shore Zm Site in Bryan County, Texas is not rated for water quality — its monitoring record does not meet the evidence bar. Water clarity: 4.9 ft visibility.

Clarity
4.9 ft
Mean depth
~80 ft est.
Type
Eutrophic
Trend
Stable

Lake Texoma Off Shore Zm Site is a productive, nutrient-rich eutrophic lake in Bryan County, Texas with an estimated average depth of about 80 feet.

Source: EPA Water Quality Portal sampling records, TCEQ, last sampled 2020-09-30. Grade methodology: LakeGrade methodology.

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Swimming Safety

Not rated for swimming — there is not enough monitoring data to judge this lake

Water Quality Grade: Not rated

Murky, only visible to about 4.9 ft. Trophic State Index: 54.

MetricValueGrade
Water Clarity (Secchi Depth)4.9 ft
PhosphorusNo data
Chlorophyll-a (Algae)No data
Trophic State Index (TSI)54Eutrophic

High nutrients, frequent algae, reduced clarity

Lake Details

CharacteristicValue
Average Depth~80 ft est.

Depth marked “est.” is a modeled estimate from HydroLAKES, not a measured survey. Texas has not published bathymetry for Lake Texoma Off Shore Zm Site.

Where to stay near Lake Texoma Off Shore Zm Site

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Fishing Lake Texoma Off Shore Zm Site

Water Quality Trend: Stable

Based on 12 years of monitoring data (2020-2025).

MetricTrendChange/YearYears
Water Clarity Stable+0.001 m/yr12
Phosphorus Stable0 µg/L/yr12
See year-by-year chart →

Location

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Nearby Lakes in Bryan County

More records, surveys & data sources

Lake Size & Watershed

Watershed (drainage) area
39,511 sq mi
Surface area
65,013 acres
Mean depth (modeled estimate)
~80 ft est.
Shoreline
249.6 mi
Elevation
623 ft

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.

Where this data comes from

10 measurements from 1 monitoring station, 2020. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • USGS Texas Water Science CenterUSGS-TX10 samples · 2020
Monitoring station identifiers (1)

Grade thresholds come from the U.S. EPA National Lakes Assessment 2022 Technical Support Document (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See how grades are calculated.

Data Sources

Water quality data from the EPA Water Quality Portal

Lake size & watershed from HydroLAKES (HydroSHEDS)

Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion

Most recent sample: 2020-09-30

Monitoring stations: 1

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