Pond health score map
Explore the health of ponds and lakes across the country
The OPAL pond health score provides an instant indication of how healthy your lake or pond is.
Higher health scores (green dots) suggest good water quality and indicate the presence of invertebrates such as caddisfly, damselfly and dragonfly larvae. Absence of these species suggests poorer water quality and results in a lower score (red dots). To see the full invertebrate scoring chart refer to the water survey workbook (PDF, 1MB).
Where are the healthiest lakes or ponds? Can you see any patterns emerging?
Pond health score 0-5: This lake or pond needs to be improved
Pond health score 6-30: This lake or pond is quite healthy
Pond health score 31 or more: This lake or pond is very healthy
| Number of surveys completed: 4610
Thank you to Guest for the latest survey results.