Trenchford Reservoir
Devon and Cornwall, EnglandView mapDirections
EA publishes the water-quality measurements for Trenchford Reservoir. Here is what has been measured.
- Limited data
Trenchford Reservoir in Devon and Cornwall, England has official water-quality measurements, shown as reported. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 6.1 µg/L.
How Trenchford Reservoir is classified
Trenchford Reservoir in England is published with the authority's own measurements and class. The measurements here are published by the agency that samples the lake, as reported. Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
LakeQuality publishes no grade of its own beside it. Everything below thathas been measured is reported on this page.
Monitoring: the Environment Agency (England).
Trenchford Reservoir is a lake in Devon and Cornwall County, England.
Source: the Environment Agency (England) — not the EPA Water Quality Portal, last sampled 2026-06-15. Methodology: how these readings are compared.
Swimming conditions
No readingLimited data
Nutrient and algae readings are not a swimming clearance. Check local advisories before you swim.
Whether Trenchford Reservoir is safe to swim in today is a call for the Environment Agency (England) and the county health department, who post current advisories. LakeQuality does not issue swimming clearances.
Water quality measurements for Trenchford Reservoir
These are the measurements EA publishes for Trenchford Reservoir. More on the source.
No clarity data. Phosphorus 12 µg/L. Chlorophyll-a 6.1 µg/L. TSI 44.
| Measure | Reading | Where it sits |
|---|---|---|
| Water clarity (Secchi depth) | No reading How deep a black-and-white disk stays visible from the surface. Higher is clearer. | |
| Total phosphorus | 12µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 6.1µg/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. | 44 | Mesotrophic OligotrophicMesotrophicEutrophicHypereutrophic |
Moderate nutrients, good water quality
Ask about Trenchford Reservoir
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Trenchford Reservoir
Compare lakeside cabins, hotels, and vacation rentals near Trenchford Reservoir in Devon and Cornwall, England — 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 Trenchford Reservoir
Prices for Oct 2–4, 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.
Follow Trenchford Reservoir’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Trenchford Reservoir
Frequently asked questions about Trenchford Reservoir
Where is Trenchford Reservoir?
- Trenchford Reservoir is a lake in Devon and Cornwall, England. This page reports official water-quality measurements, shown as reported.
What is the water quality of Trenchford Reservoir?
- Trenchford Reservoir in Devon and Cornwall, England has official water-quality measurements, shown as reported. Phosphorus: 12 µg/L. Chlorophyll-a (algae): 6.1 µg/L.
Is Trenchford Reservoir safe to swim in?
- Trenchford Reservoir has official nutrient and clarity measurements, not a bacteria swim class and not a safety clearance. Algal blooms, currents, and depth are not covered. Always check local notices before swimming.
Explore Trenchford Reservoir across LakeQuality
More lakes in England
Where this data comes from
6 measurements from 1 monitoring station, 2026. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa6 samples · 2026
Monitoring station identifiers (1)
SW-LSN0190
Authority classifications are shown as the authority published them. See where the data comes from and data sources.