North Metropolitan Pit :Cheshunt Lake
Herts and North London, EnglandView mapDirections
This is the name EA records for this water. It can describe one sampling location rather than the water as a whole.
EA publishes the water-quality measurements for North Metropolitan Pit :Cheshunt Lake. Here is what has been measured.
- Limited data
North Metropolitan Pit :Cheshunt Lake in Herts and North London, England has official water-quality measurements, shown as reported. Phosphorus: 112 µg/L. Chlorophyll-a (algae): 13.7 µg/L.
How North Metropolitan Pit :Cheshunt Lake is classified
North Metropolitan Pit :Cheshunt Lake 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).
North Metropolitan Pit :Cheshunt Lake is a lake in Herts and North London County, England.
Source: the Environment Agency (England) — not the EPA Water Quality Portal, last sampled 2022-01-26. 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 North Metropolitan Pit :Cheshunt Lake 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 North Metropolitan Pit :Cheshunt Lake
These are the measurements EA publishes for North Metropolitan Pit :Cheshunt Lake. More on the source.
No clarity data. Phosphorus 112 µg/L. Chlorophyll-a 13.7 µg/L. TSI 64.
| 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 | 112µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 13.7µg/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. | 64 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
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Frequently asked questions about North Metropolitan Pit :Cheshunt Lake
Where is North Metropolitan Pit :Cheshunt Lake?
- North Metropolitan Pit :Cheshunt Lake is in Herts and North London, England. This is the name EA records for this water. It can describe one sampling location rather than the water as a whole. This page reports official water-quality measurements, shown as reported.
What is the water quality of North Metropolitan Pit :Cheshunt Lake?
- North Metropolitan Pit :Cheshunt Lake in Herts and North London, England has official water-quality measurements, shown as reported. Phosphorus: 112 µg/L. Chlorophyll-a (algae): 13.7 µg/L.
Is North Metropolitan Pit :Cheshunt Lake safe to swim in?
- North Metropolitan Pit :Cheshunt 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.
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Where this data comes from
110 measurements from 1 monitoring station, 2016–2022. Retrieved from the Environment Agency (England; not the EPA Water Quality Portal) on 2026-08-16.
Collected and reported by
- Environment Agency (England)
ea-wqa110 samples · 2016–2022
Monitoring station identifiers (1)
TH-PGWL0174
Authority classifications are shown as the authority published them. See where the data comes from and data sources.