Lake Houston is a highly nutrient-loaded hypereutrophic lake in Harris County, Texas. Water quality is graded D based on 2 sampling years through 2025. Compared to the 4 other monitored lakes in Harris County, Lake Houston ranks #4 for water quality.
Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-03-31. Grade methodology: LakeGrade methodology.
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Swimming Safety
Swimming not recommended, poor water quality with high algae risk
Water Quality Grade: D, Poor
Very murky, less than 0.6 ft of visibility. Phosphorus level: 780 µg/L. Chlorophyll-a: 26.2 µg/L. Trophic State Index: 83.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | 0.6 ft | F |
| Phosphorus | 780 µg/L | F |
| Chlorophyll-a (Algae) | 26.2 µg/L | D |
| Trophic State Index (TSI) | 83 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near Lake Houston
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Fishing Lake Houston
Location
County Ranking
Ranked #4 of 5 lakes in Harris County
Cleaner Lakes Within 30 Miles
Lake Houston holds Grade D. One nearby lake has a higher grade.
See full comparison →Nearby Lakes in Harris County
Explore Lake Houston across LakeGrade
More Texas Lake Rankings
Other Grade D Lakes in Texas
Montgomery County · Clarity: 2.2 ft
Jefferson County · Clarity: 1.3 ft
Washington County · Clarity: 1.9 ft
Burleson County · Clarity: 1.8 ft
Nacogdoches County · Clarity: 0.8 ft
Angelina County · Clarity: 1.6 ft
Hypereutrophic Lakes in Texas
More records, surveys & data sources
Data Sources
Water quality data from the EPA Water Quality Portal
Grading methodology based on Metropolitan Council standards
Most recent sample: 2025-03-31
Monitoring stations: 1