South Walsham Broad
South Walsham Broad in Essex Norfolk and Suffolk, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 150 µg/L. Chlorophyll-a (algae): 79.2 µg/L.
Why South Walsham Broad has no A–F grade
South Walsham Broad 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).
South Walsham Broad is a lake in Essex Norfolk and Suffolk County, England.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2026-07-20. 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 South Walsham Broad
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 150 µg/L. Chlorophyll-a: 79.2 µg/L. Trophic State Index: 75.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 150 µg/L | Not graded |
| Chlorophyll-a (Algae) | 79.2 µg/L | Not graded |
| Trophic State Index (TSI) | 75 | Hypereutrophic |
Very high nutrients, dense algae, poor clarity
Where to stay near South Walsham Broad
Compare lakeside cabins, hotels, and vacation rentals near South Walsham Broad in Essex Norfolk and Suffolk, 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 South Walsham Broad
Frequently asked questions about South Walsham Broad
What is the water quality of South Walsham Broad?
- South Walsham Broad in Essex Norfolk and Suffolk, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 150 µg/L. Chlorophyll-a (algae): 79.2 µg/L.
Is South Walsham Broad safe to swim in?
- South Walsham Broad 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 South Walsham Broad across LakeGrade
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Where this data comes from
201 measurements from 1 monitoring station, 2016–2026. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa201 samples · 2016–2026
Monitoring station identifiers (1)
AN-BUR310
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: 2026-07-20
Monitoring stations: 1