WellAtlas Canada

Water well records, mapped

Ontario's public water-well records on a map: depth, water level, yield, geology and how approximate each location really is. No account, no tracking.

Coming soon to the App Store and Google Play.

WellAtlas Canada is an independent application and is not affiliated with or endorsed by the Government of Canada or any provincial or territorial government.

What it looks like

Screens from the iOS app. The Android app shows the same records.

Map of the Lake Simcoe area between Orillia and Sutton, with wells grouped into numbered circles — 861, 539, 431, 2k — instead of individual pins.

Map of Toronto's Danforth Avenue and Oakridge Park area zoomed in far enough that each well record is its own marker along the residential streets.

Well record 7469646 in Uxbridge Township. Reported position 44.06983, -79.12010; accuracy “Within about 100 m”, with the note that the mapped point is approximate and the publisher's own wording “margin of error : 30 m - 100 m”.

Nearby wells summary: median well depth 9.1 m, captioned “Based on 990 of 1,311 nearby records”, with the middle half 6.1 m–13.6 m, the range 0 m–128.9 m and a distribution chart.

Data coverage screen: Ontario marked “Full direct dataset”, 1,022,416 records, dataset version 2026a, last imported September 18, 2026; Alberta and British Columbia “Coming soon”; Manitoba, New Brunswick and Newfoundland and Labrador “Planned”.

What you can do

Map

Browse more than a million Ontario well records. Zoomed out you see how many records are in an area; zoom in to about street level and each well becomes its own marker. A list view shows the same wells as text, for screen readers or whenever a map is not the easiest way to read them.

Search

By well identifier, by municipality, by latitude and longitude, or by searching the area you are already looking at.

Well detail

Depth, static water level, reported yield, construction date and method, casing, the geology log the driller wrote down, and where the water was found. Values are shown as the source published them, with the publisher, the dataset version and a link to the original record.

Nearby analysis

Median, middle half (P25–P75), range and a distribution chart for the reported wells within 500 m to 10 km of a point. Every figure carries the count it came from — Based on 990 of 1,311 nearby records — so a number from three wells never looks like a number from three hundred. These are summaries of records that already exist nearby. They are not a prediction for any particular property.

Filters

Well type, status, reported use, construction method, casing material, location accuracy, and ranges for depth, static water level, yield, bedrock depth and construction date. Missing is not zero: you choose whether records the source left blank are excluded, included, or shown on their own.

Saved wells

Save any well with your own note, and read it again later. Saved wells stay on your device.

English and French

The whole interface, in both languages. Text that comes out of a government record — material descriptions, the source's own accuracy wording, municipality names — is shown exactly as published and is never translated.

Privacy

No account, no sign-in, no advertising, no analytics, no tracking. Your location is read only when you tap Use my location, only while the app is open, and is never stored. It is used once, to centre the map or run the nearby search you asked for, and is never linked to you. Everything except that one button works without location access. Read the privacy policy.

What the app says honestly about the data

A government well record is what a driller reported. It is not a survey, and the app is built around that.

Most positions are approximate. Only about 0.3% of Ontario records have a location measured to within 10 m — 3,307 of 1,022,416. The rest are approximate or of unknown accuracy, and about 5% carry no mapped position at all. Read a marker as somewhere near here, not as a property corner.
Every statistic states its sample. Based on 44 of 48 nearby records appears under the number, not in a footnote.
Missing is never zero. A well with no reported depth reads Not reported.
Every record names its publisher, the dataset version it came from, and links to the original government record.
Nothing says whether water is safe to drink. A construction record cannot tell you that, and a reported water type is not a laboratory result.

The numbers behind all of this, and what is left out for privacy, are on the data and sources page.

Questions

Email support@wellatlas.ca, or read the support page first — it answers the common ones.