What is the water quality grade for Lake Whitney Nolands River Arm?

Lake Whitney Nolands River Arm in Hill County, Texas received a water quality grade of D (Poor). Water clarity: 1.3 ft visibility. Phosphorus: 80 µg/L. Chlorophyll-a (algae): 59.2 µg/L.

Is Lake Whitney Nolands River Arm safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Lake Whitney Nolands River Arm has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 59.2 µg/L. Always check local health department advisories before swimming.

Hill County, Texas

Lake Whitney Nolands River Arm

Grade DPoor · 1.3 ft clarity

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Hypereutrophic

Lake Whitney Nolands River Arm is a highly nutrient-loaded hypereutrophic lake in Hill County, Texas. Water quality is graded D based on 2 sampling years through 2025. Compared to the 4 other monitored lakes in Hill County, Lake Whitney Nolands River Arm ranks #4 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-11-12. 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 1.3 ft of visibility. Phosphorus level: 80 µg/L. Chlorophyll-a: 59.2 µg/L. Trophic State Index: 70.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.3 ft	F
Phosphorus	80 µg/L	D
Chlorophyll-a (Algae)	59.2 µg/L	F
Trophic State Index (TSI)	70	Hypereutrophic

Very high nutrients, dense algae, poor clarity

Where to stay near Lake Whitney Nolands River Arm

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