What is the water quality grade for Aquilla Reserv Aquilla Creek Arm Lake?

Aquilla Reserv Aquilla Creek Arm Lake in Hill County, Texas received a water quality grade of C (Fair). Water clarity: 2.2 ft visibility. Phosphorus: 45 µg/L. Chlorophyll-a (algae): 36.6 µg/L.

Is Aquilla Reserv Aquilla Creek Arm Lake safe to swim in?

Swim with caution, moderate algae may be present. Aquilla Reserv Aquilla Creek Arm Lake has an overall water quality grade of C. Algae concentration (chlorophyll-a) is 36.6 µg/L. Always check local health department advisories before swimming.

Hill County, Texas

Aquilla Reserv Aquilla Creek Arm Lake

Grade CFair · 2.2 ft clarity

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Eutrophic

Aquilla Reserv Aquilla Creek Arm Lake is a productive, nutrient-rich eutrophic lake in Hill County, Texas. Water quality is graded C based on 2 sampling years through 2026. Compared to the 4 other monitored lakes in Hill County, Aquilla Reserv Aquilla Creek Arm Lake ranks #2 for water quality.

Source: EPA Water Quality Portal sampling records, Texas DNR, last sampled 2026-02-03. Grade methodology: LakeGrade methodology.

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Swimming Safety

Swim with caution, moderate algae may be present

Water Quality Grade: C, Fair

Very murky, less than 2.2 ft of visibility. Phosphorus level: 45 µg/L. Chlorophyll-a: 36.6 µg/L. Trophic State Index: 64.

Metric	Value	Grade
Water Clarity (Secchi Depth)	2.2 ft	F
Phosphorus	45 µg/L	C
Chlorophyll-a (Algae)	36.6 µg/L	D
Trophic State Index (TSI)	64	Eutrophic

High nutrients, frequent algae, reduced clarity

Where to stay near Aquilla Reserv Aquilla Creek Arm Lake

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