Search Records

Protected wellfield polygons are a graphical representation of wellfield boundaries as defined in the Clean Water Act – Wellfield Protected Area Designation Order. Attributes include municipality, designation number, zones and associated wellfield ID’s.

Cyanobacteria (also referred to as blue-green algae) are common photosynthetic bacteria that live in surface waters. Under favorable conditions, such as warm water and high nutrient content, these bacteria can form nuisance “blooms”. The presence of blooms in recreational water causes unpleasant...

Fish consumption advisories for Ontario's lakes and rivers are available in the Guide to Eating Ontario Fish. The zip file below includes a GIS shapefile of all lake/river locations and a text file of all consumption advisory data from the current edition of the Guide. Fish consumption advice map...

Get data describing benthic-invertebrate (bottom dwelling aquatic invertebrates) community structure and habitat conditions in various waterbodies. This dataset includes: * counts of different kinds of benthic invertebrates * water chemistry * information about collected samples (geographic...

Provides stream water quality monitoring data for a number of parameters, including total and dissolved nutrients, metals, and chloride. The Provincial (Stream) Water Quality Monitoring Network (PWQMN) measures water quality in rivers and streams across Ontario. This dataset provides stream water...

The province of PEI has been monitoring dissolved oxygen in some Island estuaries since 2015. This dataset contains data collected in 2022. Monitoring results from earlier years can also be found on the Prince Edward Island open data portal.This dataset includes raw data from 20 Island estuaries...

The Provincial Groundwater Monitoring Network (PGMN) datasets report on ambient (baseline) groundwater level and chemistry conditions. Groundwater monitoring map

Volumes of water taken daily and annually under a Permit-to-Take-Water, as reported to the ministry under the Water Taking and Transfer Regulation 387/04. The Ontario Water Resources Act (Act) requires anyone who takes more than 50,000 litres of water in a day to obtain a Permit to take Water...

This collection represents the authoritative watershed boundaries for Ontario. The data is based on a framework similar to the Atlas of Canada Fundamental Drainage Areas and the United States Watershed Boundary Dataset, however it adopts a more stringent scientific approach to watershed...

The Nova Scotia Automated Surface Water Quality Monitoring Network was established in 2002 to assess water quality in surface waters across the province at five stations (and one discontinued station, St Mary's River).  The results are used to help manage water resources, determine baseline water...