River Avon Lake
River Avon Lake in Devon and Cornwall, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 9.6 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
Why River Avon Lake has no A–F grade
River Avon Lake in England is published with the authority's own measurements, not a LakeQuality letter. official authority class; not a LakeQuality A–F letter Sampling here has recorded phosphorus and algae (chlorophyll-a), but not water clarity.
A letter on the LakeQuality scale would be an invention, not an official class. Everything below that has been measured is still reported on this page.
Monitoring: the Environment Agency (England).
River Avon Lake is a lake in Devon and Cornwall County, England.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2020-01-27. Grade methodology: LakeGrade methodology.
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Swimming Safety
Not ratedLimited data
Not rated for swimming — there is not enough monitoring data to judge this lake
Water quality measurements for River Avon Lake
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 9.6 µg/L. Chlorophyll-a: 1.7 µg/L. Trophic State Index: 36.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 9.6 µg/L | Not graded |
| Chlorophyll-a (Algae) | 1.7 µg/L | Not graded |
| Trophic State Index (TSI) | 36 | Oligotrophic |
Low nutrients, clear water, excellent for swimming
Where to stay near River Avon Lake
Compare lakeside cabins, hotels, and vacation rentals near River Avon Lake 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.
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Fishing River Avon Lake
Frequently asked questions about River Avon Lake
What is the water quality of River Avon Lake?
- River Avon Lake in Devon and Cornwall, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 9.6 µg/L. Chlorophyll-a (algae): 1.7 µg/L.
Is River Avon Lake safe to swim in?
- River Avon Lake 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 River Avon Lake across LakeGrade
More lakes in England
Where this data comes from
33 measurements from 1 monitoring station, 2016–2020. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa33 samples · 2016–2020
Monitoring station identifiers (1)
SW-70826092
Authority classifications are stored separately from LakeQuality A–F letters and are never blended. See methodology and data sources.
Data Sources
Water quality data from the EPA Water Quality Portal
Grade thresholds from the EPA National Lakes Assessment (EPA 841-R-24-006, Table 6-3), applied by ecoregion
Most recent sample: 2020-01-27
Monitoring stations: 1