Seventy Acres Lake :Fishers Green
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 Seventy Acres Lake :Fishers Green. Here is what has been measured.
- Limited data
Seventy Acres Lake :Fishers Green in Herts and North London, England has official water-quality measurements, shown as reported. Phosphorus: 200 µg/L. Chlorophyll-a (algae): 8.1 µg/L.
How Seventy Acres Lake :Fishers Green is classified
Seventy Acres Lake :Fishers Green 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).
Seventy Acres Lake :Fishers Green is a lake in Herts and North London County, England.
Source: the Environment Agency (England) — not the EPA Water Quality Portal, last sampled 2022-01-28. 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 Seventy Acres Lake :Fishers Green 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 Seventy Acres Lake :Fishers Green
These are the measurements EA publishes for Seventy Acres Lake :Fishers Green. More on the source.
No clarity data. Phosphorus 200 µg/L. Chlorophyll-a 8.1 µg/L. TSI 66.
| 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 | 200µg/L | Measured, not scored The nutrient that most limits algae growth in freshwater. More phosphorus, more algae potential. |
| Chlorophyll-a (algae) | 8.1µg/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. | 66 | Eutrophic OligotrophicMesotrophicEutrophicHypereutrophic |
High nutrients, frequent algae, reduced clarity
Ask about Seventy Acres Lake :Fishers Green
Answers come straight from the public measurements and survey records on this page.
Stays via Stay22
Stays near Seventy Acres Lake :Fishers Green
Compare lakeside cabins, hotels, and vacation rentals near Seventy Acres Lake :Fishers Green in Herts and North London, 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 Seventy Acres Lake :Fishers Green
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 Seventy Acres Lake :Fishers Green’s readings
Email me when new measurements post for this lake. Updates stay free.
Or email
Fishing Seventy Acres Lake :Fishers Green
Frequently asked questions about Seventy Acres Lake :Fishers Green
Where is Seventy Acres Lake :Fishers Green?
- Seventy Acres Lake :Fishers Green 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 Seventy Acres Lake :Fishers Green?
- Seventy Acres Lake :Fishers Green in Herts and North London, England has official water-quality measurements, shown as reported. Phosphorus: 200 µg/L. Chlorophyll-a (algae): 8.1 µg/L.
Is Seventy Acres Lake :Fishers Green safe to swim in?
- Seventy Acres Lake :Fishers Green 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 Seventy Acres Lake :Fishers Green across LakeQuality
More lakes in England
Where this data comes from
109 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-wqa109 samples · 2016–2022
Monitoring station identifiers (1)
TH-PGWL0173
Authority classifications are shown as the authority published them. See where the data comes from and data sources.