What is the water quality grade for Lake Waco N Bosque Arm?

Lake Waco N Bosque Arm in McLennan County, Texas received a water quality grade of D (Poor). Water clarity: 1.3 ft visibility. Phosphorus: 41.6 µg/L. Chlorophyll-a (algae): 43.2 µg/L.

Is Lake Waco N Bosque Arm safe to swim in?

Swimming not recommended, poor water quality with high algae risk. Lake Waco N Bosque Arm has an overall water quality grade of D. Algae concentration (chlorophyll-a) is 43.2 µg/L. Always check local health department advisories before swimming.

McLennan County, Texas

Lake Waco N Bosque Arm

Grade DPoor · 1.3 ft clarity

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Eutrophic

Lake Waco N Bosque Arm is a productive, nutrient-rich eutrophic lake in McLennan County, Texas. Water quality is graded D based on 2 sampling years through 2025. Compared to the 2 other monitored lakes in McLennan County, Lake Waco N Bosque Arm ranks #3 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2025-11-04. 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: 41.6 µg/L. Chlorophyll-a: 43.2 µg/L. Trophic State Index: 66.

Metric	Value	Grade
Water Clarity (Secchi Depth)	1.3 ft	F
Phosphorus	41.6 µg/L	C
Chlorophyll-a (Algae)	43.2 µg/L	F
Trophic State Index (TSI)	66	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Lake Waco N Bosque Arm

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