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LakeQuality

Waller Mill Reserv Sta Lake

York County, VirginiaView mapDirections

This is the name Virginia DEQ records for this water. It can describe one sampling location rather than the water as a whole.

Virginia DEQ publishes the water-quality measurements for Waller Mill Reserv Sta Lake. Here is what has been measured.

Clarity
3.9 ft
Typical for Virginia
Secchi · sampled 2025
Phosphorus
30 µg/L
Typical for Virginia
Measured by Virginia DEQ
Chlorophyll-a
11.1 µg/L
Typical for Virginia
Measured by Virginia DEQ
Type
Eutrophic
Trophic class
Trend
Worsening
5 years of samples
  • Eutrophic

Waller Mill Reserv Sta Lake in York County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 3.9 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 11.1 µg/L.

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Waller Mill Reserv Sta Lake is a productive, nutrient-rich eutrophic lake in York County, Virginia. Overall water quality is declining over recent sampling years. Compared to the 6 other monitored lakes in York County, Waller Mill Reserv Sta Lake ranks #5 for water quality.

Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2025-09-25. Methodology: how these readings are compared.

Swimming conditions

Readings only

Low algae

Based on clarity and algae readings from past sampling — there is no live water temperature and a current cyanobacteria reading for this lake. Check your state or county health department before you swim.

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Whether Waller Mill Reserv Sta Lake is safe to swim in today is a call for the Virginia Department of Environmental Quality and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.

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Water quality measurements for Waller Mill Reserv Sta Lake

These are the measurements Virginia DEQ publishes for Waller Mill Reserv Sta Lake, shown as reported. The condition class beside each reading is the EPA National Lakes Assessment class for this lake’s ecoregion.

Murky, only visible to about 3.9 ft. Phosphorus 30 µg/L. Chlorophyll-a 11.1 µg/L. TSI 55.

Water quality readings
MeasureReadingWhere it sits
Water clarity (Secchi depth)3.9ftMeasured, not scored

How deep a black-and-white disk stays visible from the surface. Higher is clearer.

Total phosphorus30µg/LGood
GoodFairPoor
Chlorophyll-a (algae)11.1µg/LGood
GoodFairPoor
Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a.55Eutrophic
OligotrophicMesotrophicEutrophicHypereutrophic

High nutrients, frequent algae, reduced clarity

Ask about Waller Mill Reserv Sta Lake

Answers come straight from the public measurements and survey records on this page.

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Stays near Waller Mill Reserv Sta Lake

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Fishing Waller Mill Reserv Sta Lake

Based on 5 years of monitoring (2013–2025).

  • Water clarity

    Stable

    5 years

  • Phosphorus

    Stable

    -0.33 µg/L/yr5 years

  • Chlorophyll-a

    Worsening

    +0.27 µg/L/yr5 years

See year-by-year chart →

Nearby Lakes in York County

Frequently asked questions about Waller Mill Reserv Sta Lake

Where is Waller Mill Reserv Sta Lake?

Waller Mill Reserv Sta Lake is in York County, Virginia. This is the name Virginia DEQ records for this water. It can describe one sampling location rather than the water as a whole. Its water-quality measurements are published by Virginia DEQ and shown on this page as reported.

What is the water quality of Waller Mill Reserv Sta Lake?

Waller Mill Reserv Sta Lake in York County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 3.9 ft visibility. Phosphorus: 30 µg/L. Chlorophyll-a (algae): 11.1 µg/L.

Measurements on this page ↑

Is Waller Mill Reserv Sta Lake safe to swim in?

Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.

Swimming on this page ↑

Where this data comes from

147 measurements from 1 monitoring station, 2013–2025. Retrieved from the EPA Water Quality Portal on 2026-08-02.

Collected and reported by

  • VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY21VASWCB147 samples · 2013–2025

Analytical methods

  • Tyler, John. 1968. The secchi disk, Limnology and Oceanograpy, 13(1):1-6.
  • Total Phosphorus After Block Digestion
  • 445.0 ~ EPA; Chlorophyll and Pheophytin in Algae by Fluorescence
  • 2130 B ~ Nephelometric Method
Monitoring station identifiers (1)

EPA condition classes from the National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion. See where the data comes from and data sources.