Rt. Lake
Louisa County, VirginiaView mapDirections
Virginia DEQ publishes the water-quality measurements for Rt. Lake. Here is what has been measured.
- Impaired · PCBs
- Limited data
Rt. Lake in Louisa County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 5.2 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 11.3 µg/L.
Rt. Lake is a lake in Louisa County, Virginia. Water clarity is improving over recent sampling years.
Source: EPA Water Quality Portal sampling records, Virginia DEQ, last sampled 2018-09-05. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Rt. Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pCBs. Check local advisories before you swim.
Whether Rt. 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.
Water quality measurements for Rt. Lake
These are the measurements Virginia DEQ publishes for Rt. 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 5.2 ft. Phosphorus 10 µg/L. Chlorophyll-a 11.3 µg/L. TSI 48.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | 5.2ft | Measured, not scored How deep a black-and-white disk stays visible from the surface. Higher is clearer. |
| Total phosphorus | 10µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 11.3µg/L | Measured, not scored The green pigment in algae — a direct measure of how much algae is in the water. |
| Trophic state (TSI)Carlson's 0–100 index of how much algae a lake can support, from clarity, phosphorus and chlorophyll-a. | 48 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Rt. Lake
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Rt. Lake
Compare lakeside cabins, hotels, and vacation rentals near Rt. Lake in Louisa County, Virginia — live availability and prices for your trip. Switch the map to Satellite to see the lake and how close each stay is to the water.
Top-rated places to stay near Rt. Lake
Prices for Oct 30–Nov 1, 4 adults. Change dates on the map below.
Availability and prices from Stay22 partners (Booking.com, Vrbo, Expedia). We may earn a commission from bookings, at no extra cost to you.
Planning a whole trip? See where to stay at Virginia’s top lakes →
Follow Rt. Lake’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Rt. Lake
Water Quality Trend: Stable
Based on 4 years of monitoring (2012–2018).
Water clarity
Improving4 years
Phosphorus
Stable0 µg/L/yr2 years
Chlorophyll-a
Worsening+1.25 µg/L/yr2 years
EPA Impairment Status
Rt. Lake is officially listed as impaired under Clean Water Act §303(d) in the 2022 EPA reporting cycle (IR category 5).
Causes of impairment
Designated uses not supporting: Fish consumption.
Source: EPA ATTAINS assessment unit VAN-F07L_CON01A02 · Official waterbody report
Nearby Lakes in Louisa County
Frequently asked questions about Rt. Lake
Where is Rt. Lake?
- Rt. Lake is a lake in Louisa County, Virginia. Its water-quality measurements are published by Virginia DEQ and shown on this page as reported.
What is the water quality of Rt. Lake?
- Rt. Lake in Louisa County, Virginia has water-quality measurements published by Virginia DEQ, shown here as reported. Water clarity: 5.2 ft visibility. Phosphorus: 10 µg/L. Chlorophyll-a (algae): 11.3 µg/L.
Is Rt. Lake safe to swim in?
- Nutrient and algae readings are not a swimming clearance. Rt. Lake is listed impaired under Clean Water Act §303(d) (IR 5) for pCBs. Check local advisories before you swim.
Explore Rt. Lake across LakeQuality
More lakes in Virginia
Other Lakes in Virginia
Mesotrophic Lakes in Virginia
Where this data comes from
52 measurements from 1 monitoring station, 2012–2018. Retrieved from the EPA Water Quality Portal on 2026-08-02.
Collected and reported by
- VIRGINIA DEPARTMENT OF ENVIRONMENTAL QUALITY
21VASWCB52 samples · 2012–2018
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
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.
Other records on this page
Impairment status from EPA ATTAINS 303(d) database