Halliford Mere Complex
Halliford Mere Complex in West Thames, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 5.4 µg/L.
Why Halliford Mere Complex has no A–F grade
Halliford Mere Complex 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).
Halliford Mere Complex is a lake in West Thames County, England.
Source: EPA Water Quality Portal sampling records, your state environmental agency, last sampled 2023-01-30. 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 Halliford Mere Complex
These readings exist but do not meet the evidence bar for an A–F grade — see why.
No clarity data. Phosphorus level: 32 µg/L. Chlorophyll-a: 5.4 µg/L. Trophic State Index: 51.
| Metric | Value | Grade |
|---|---|---|
| Water Clarity (Secchi Depth) | No recent samples | |
| Phosphorus | 32 µg/L | Not graded |
| Chlorophyll-a (Algae) | 5.4 µg/L | Not graded |
| Trophic State Index (TSI) | 51 | Eutrophic |
High nutrients, frequent algae, reduced clarity
Where to stay near Halliford Mere Complex
Compare lakeside cabins, hotels, and vacation rentals near Halliford Mere Complex in West Thames, 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 Halliford Mere Complex
Frequently asked questions about Halliford Mere Complex
What is the water quality of Halliford Mere Complex?
- Halliford Mere Complex in West Thames, England has official water-quality measurements, not a LakeQuality A–F grade. Phosphorus: 32 µg/L. Chlorophyll-a (algae): 5.4 µg/L.
Is Halliford Mere Complex safe to swim in?
- Halliford Mere Complex 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.
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Where this data comes from
23 measurements from 1 monitoring station, 2022–2023. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa23 samples · 2022–2023
Monitoring station identifiers (1)
TH-PRTS0067
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: 2023-01-30
Monitoring stations: 1