King Township is almost entirely inside the Greenbelt, much of it on the Oak Ridges Moraine, and its three serviced communities sit on very different ground. A hydrogeological study in King is shaped by which of those settings the property is in, whether neighbours rely on their own wells, and which of two conservation authorities reviews the watershed.
What this means for your project in King Township
- Most studies in King support development in or near Schomberg, Nobleton and King City, rural lots on private wells and septic systems, and farm water supplies.
- The Township and York Region review the application, with Lake Simcoe Region or Toronto and Region Conservation Authority depending on the watershed. York Region approves dewatering discharge to its sewers.
- Most of the township is on the Oak Ridges Moraine, so many sites need extra water budget or hydrological work beyond a basic hydrogeological report.
- The local factor most likely to affect scope and cost: nearby private wells. Many homes around the villages draw from their own wells, and dewatering near shallow dug wells calls for a well survey and monitoring.
King Township groundwater data
Calculated from public provincial datasets for Township of King. Each value names its source; links are under Sources at the end of the page.
| Median depth of wells with a water level | 48.2 m (4,156 records reporting depth and water level) |
|---|---|
| Median static water level | 16.8 m below ground (4,156 records reporting depth and water level) |
| Records reaching bedrock | 2.7% of all records with a depth |
| Well records | 6,367 records (all types) |
| Active Permits to Take Water | 37 permits; largest purpose categories: Farm uses 21 (13 + 8), Water Supply 8, Commercial 4 |
| Active construction and dewatering permits | 1 of 37 active Permits to Take Water |
| Conservation authority | Lake Simcoe Region Conservation Authority (57.4% of area); Toronto and Region Conservation Authority (42.5% of area) |
| Provincial plan areas | Oak Ridges Moraine 64.7%; Greenbelt 99.6% of area |
Source: Well Records (Water Well Information System), MECP (WWIS_2026a), retrieved 2026-10-14.
Source: Permit to Take Water, MECP (PermitsToTakeWater_26-01), retrieved 2026-10-14.
Source: Conservation Authority Administrative Area, Ontario GeoHub, retrieved 2026-10-14.
Source: Oak Ridges Moraine (ORM) Planning Area, Ontario GeoHub; Greenbelt Outer Boundary, Ontario GeoHub; Niagara Escarpment Plan Boundary, Ontario GeoHub; retrieved 2026-10-14.
Figures count records inside the municipal boundary that report a value; well locations and values are as submitted by well contractors, and MECP notes inaccuracies exist. How these figures are calculated.
King's well records describe a deep overburden setting. Wells that report a water level have a median depth of 48.2 m, and their median water level, 16.8 m below ground, is the deepest of the places we cover. Only 2.7% of records with a depth reach bedrock. 21 of the 37 active Permits to Take Water are agricultural.
Schomberg, Nobleton and King City: three different settings
The Township's 2015 hydrogeological desktop study, prepared for its water, wastewater and stormwater master plan, summarizes the ground under each serviced community from geological mapping, earlier site investigations and the provincial well records:
| Community | Setting | Wells in the study area |
|---|---|---|
| Schomberg | Schomberg Clay Plains: deep stratified clay and silt; borehole clayey silt beyond 8 m. West Holland River subwatershed, draining toward Lake Simcoe | 172 records; drilled overburden wells average 66.2 m deep; flowing artesian conditions at 8 wells; two municipal wells |
| Nobleton | South Slope: Halton Till over alternating dense sands and silts and overconsolidated clays. Humber River watershed | 334 records; 60% drilled overburden wells averaging 65.5 m deep, static level 17.2 m; flowing artesian at 2; three municipal wells |
| King City | South Slope: interstratified silty clay till, silt and clay with local sand. East Humber subwatershed | 663 records; 63% drilled overburden wells averaging 55.5 m deep, static level 20.7 m |
Two practical points follow. First, where earlier projects met glacial till and clay, they generally did not need active dewatering, while sites in coarser sand did, along with an assessment of effects on private wells. Soil type, confirmed by boreholes, is the first thing that decides whether a King project needs a dewatering assessment. Second, the deep drilled wells that supply many homes draw from confined aquifers, some under flowing artesian pressure, so new wells and test holes need to be planned for that possibility.
Private wells near construction
The desktop study identifies shallow dug or bored wells as the most susceptible to temporary construction dewatering, and notes that they are under-represented in the provincial records because their construction historically did not have to be reported. Around 3 to 4% of the records in each study area were dug or bored wells, with average static levels near 3 m below ground. For a project that will dewater near the villages, a door-to-door private well survey is often more reliable than the records alone, and York Region's terms of reference allow a municipality to ask for sentry wells and well monitoring where private supplies could be affected.
Municipal water and source protection
York Region's 2025 King City report says King City is supplied with Lake Ontario water through the York system and that its two wells are currently offline. The Township's 2024 drinking water reports describe the Nobleton and Schomberg systems as receiving treated water from York Region treatment and groundwater wells. Where a proposal falls in a wellhead protection area, York Region's Risk Management Official may need to issue a source water protection permit before the Township treats the application as complete.
Moraine, watersheds and approvals in brief
- Oak Ridges Moraine. 64.7% of King is in the plan area. Under the Oak Ridges Moraine Conservation Plan, development near key hydrologic features needs a hydrological evaluation and some major development needs a water budget.
- Lake Simcoe watershed. Schomberg and the rest of northern King drain to Lake Simcoe, so the Lake Simcoe Protection Plan applies there: LSRCA reviews the water balance and recharge, and an offsetting fee is charged when infiltration cannot be kept on site. See our page on East Gwillimbury and LSRCA offsetting.
- York Region. Shared hydrogeological terms of reference and primary dewatering discharge approvals. See our Vaughan hydrogeology page.
Hydrogeological study cost in King Township
| Study | Starting point | Full span |
|---|---|---|
| Hydrogeological assessment for development | $12,000 – $18,000 | $12,000 – $150,000 |
| Severance well and septic study | $5,500 – $8,500 | $2,500 – $17,500 |
| Site water balance assessment | $3,000 – $5,000 | $3,000 – $14,000 |
| Water supply assessment and pumping test | $7,000 – $11,000 | $7,000 – $86,500 |
| Dewatering study for an excavation | $9,000 – $14,000 | $9,000 – $62,500 |
These are indicative ranges based on typical scopes, the same province-wide ranges the estimator uses, not prices specific to King Township. Locally, the work is reviewed by King Township, York Region and Lake Simcoe Region or Toronto and Region Conservation and, for water takings, the ministry, and the scope they ask for is what moves a quote. Near the villages, private well surveys and monitoring for dewatering projects add work. Excludes well drilling, government application fees and HST. For quote comparisons, read the guide to hydrogeological study costs.
Projects that need a hydrogeological study in King Township
- Village subdivisions and infill. Hydrogeological report and water balance, plus a dewatering assessment and private well survey where sands are present.
- Rural lots and estate homes. D-5-4 and D-5-5 work for private wells and septic systems, often on moraine land.
- Farms and nurseries. Pumping tests and Permits to Take Water for irrigation and other agricultural takings.
- Sewer and watermain construction. Trench dewatering near private wells, with Regional discharge approval.
Working with a hydrogeologist in King Township
King is one of the York Region municipalities with primary dewatering approvals: the Region runs the application for discharge to its infrastructure, charges an application fee and a monthly monitoring fee, and takes up to six weeks to review a complete package. Near the villages many homes rely on their own wells, and the Township's desktop study identifies shallow dug wells as the most sensitive, so a hydrogeological assessment in King for a project that dewaters often needs a door-to-door well survey. Send borehole logs first: soil type decides whether active dewatering is needed. Confirm the licence of whoever runs the King well survey and signs the report on the PGO online register.
For a lot split in King's countryside, our severance hydrogeology guide explains when private well and septic testing is needed.
King Township questions
Is all of King Township on the Oak Ridges Moraine?
Not all, but most of it is covered by provincial plans. In the provincial boundary data, 64.7% of the township is in the Oak Ridges Moraine planning area and 99.6% is inside the Greenbelt outer boundary. Where a site is on the moraine, the Oak Ridges Moraine Conservation Plan can add a hydrological evaluation or a water budget; our Caledon page explains those requirements.
Will construction dewatering affect my neighbours' wells?
It can, and the Township's 2015 hydrogeological desktop study says which wells are most at risk: shallow dug or bored wells, which are also the most sensitive to seasonal changes and are under-represented in the well records because their construction historically did not have to be reported. High-yield wells can also be affected, typically when the dewatering draws on the same aquifer.
What are flowing artesian conditions, and do they occur in King?
Flowing artesian conditions mean groundwater in a confined aquifer is under enough pressure to rise above the ground surface in a well. The Township's desktop study found them reported at eight drilled overburden wells in the Schomberg study area and two in Nobleton. Where they are possible, drilling and well construction need to plan for them.
Who approves dewatering discharge in King?
York Region approves construction dewatering discharge in King, where its dewatering discharge approvals are "primary" and the Region runs the application itself. Many homes near Schomberg, Nobleton and King City draw on their own wells, and the Township's desktop study names shallow dug wells as the most sensitive to dewatering, so the application often rests on a door-to-door well survey.
Where does King City get its water?
King City gets its water from Lake Ontario through the York Region system. York Region's 2025 King City report says two wells are installed but currently offline. The Township's 2024 reports describe the Nobleton and Schomberg systems as receiving treated water from York Region treatment and groundwater wells.
Which conservation authority will review my study?
It depends on the watershed. Lake Simcoe Region Conservation Authority covers about 57.4% of the township in the provincial data, including Schomberg, and Toronto and Region Conservation Authority about 42.5%, including Nobleton and King City in the Humber River watershed.
Studies for King properties
- Development Hydrogeological Study
Groundwater assessments that support subdivision, site plan and zoning applications.
- Severance Hydrogeological Study (D-5-4 / D-5-5)
Groundwater quality and well supply assessments for rural lot creation under MECP guidelines D-5-4 and D-5-5.
- Water Balance Assessment
Pre- and post-development water budgets for planning approvals and low impact development design.
- Water Supply Well Assessment & Pumping Tests
Pumping tests, well yield and interference assessments for commercial, agricultural and communal supplies.
- Hydrogeological study cost guide
Ranges for every study type, side by side.
Near King Township
Sources
- Well Records: Water Well Information System (WWIS_2026a) and county Well Record Data Reports (WW_Reports_2026a) (opens in a new tab), Government of Ontario (MECP), Ontario Data Catalogue.
- Permit to Take Water dataset (PermitsToTakeWater_26-01) (opens in a new tab), Government of Ontario (MECP), Ontario Data Catalogue.
- Conservation Authority Administrative Area (opens in a new tab), Ontario GeoHub.
- Oak Ridges Moraine (ORM) Planning Area (opens in a new tab), Ontario GeoHub.
- Greenbelt Outer Boundary (opens in a new tab), Ontario GeoHub.
- Niagara Escarpment Plan Boundary (opens in a new tab), Ontario GeoHub.
- Hydrogeological desktop study, Schomberg, Nobleton and King City (May 2015), appendix to the water, wastewater and stormwater master plan (opens in a new tab), Township of King.
- 2025 Annual Report: King City drinking water system (opens in a new tab), York Region.
- 2024 drinking water annual reports and council report (Ansnorveldt, King City, Nobleton, Schomberg) (opens in a new tab), Township of King.
- Source Water Protection Permit (Section 59 Notice) (opens in a new tab), York Region.
- O. Reg. 140/02: Oak Ridges Moraine Conservation Plan (opens in a new tab), Government of Ontario (e-Laws).
- Terms of Reference: Hydrogeological Report (Development Application Supporting Studies, June 2024) (opens in a new tab), York Region.
- Public Register (registered members) (opens in a new tab), Professional Geoscientists Ontario.
- Municipal Boundary - Lower and Single Tier (opens in a new tab), Ontario GeoHub.
- OHN Waterbody, 2M generalized layer (provincial hydrography dataset) (opens in a new tab), Ontario GeoHub.
- Sewer Use Permits: Temporary Dewatering Discharge Program (Sewer Use Bylaw No. 2021-102) (opens in a new tab), York Region.