How much does a hydrogeological study cost in Ontario?
A hydrogeological study in Ontario costs from about $2,500 for a short infiltration test program to about $150,000 for a large development on private services with a year of monitoring. A severance study starts at $5,500 – $8,500 and a development study at $12,000 – $18,000. These are indicative ranges based on typical scopes, and they exclude well drilling, government fees and HST.
This guide gives the range for every study type, works through five common projects, and explains how to compare quotes. Municipalities use different names for the same work, so a quoted hydrogeological assessment cost or hydrogeological report cost can be compared with the ranges here as long as the scope matches. Every study is completed by a licensed hydrogeologist (P.Geo.) or professional engineer (P.Eng.). For how the schedule adds up, see how long a hydrogeological study takes.
Ranges by study type
Hydrogeological study cost ranges are listed below for every study type, with a typical starting point and the full span seen across project sizes.
| Study | Starting point | Full span |
|---|---|---|
| Severance hydrogeological study (D-5-4 / D-5-5) | $5,500 – $8,500 | $2,500 – $17,500 |
| Development hydrogeological study | $12,000 – $18,000 | $12,000 – $150,000 |
| Construction dewatering assessment | $9,000 – $14,000 | $9,000 – $62,500 |
| Permit to Take Water (long-term taking) | $12,000 – $20,000 | $5,500 – $31,000 |
| Groundwater discharge permit and foundation drainage | $3,500 – $6,000 | $3,500 – $15,500 |
| Water balance assessment | $3,000 – $5,000 | $3,000 – $14,000 |
| Infiltration testing (LID) | $2,500 – $4,000 | $2,500 – $14,500 |
| Water supply well assessment and pumping test | $7,000 – $11,000 | $7,000 – $86,500 |
| Hydrogeological assessment for a large septic system | $7,000 – $11,000 | $7,000 – $37,000 |
| Source water protection risk assessment | $4,500 – $7,000 | $4,500 – $15,500 |
| Groundwater monitoring and annual reporting (per year) | $4,000 – $6,500 | $4,000 – $61,000 |
Starting point: the simplest common case for that study. Full span: from the smallest to the largest typical project. Groundwater monitoring is per year. Excludes well drilling, government application fees and HST.
What you pay for, study by study
What a hydrogeological study pays for differs by type, from a pumping test and nitrate assessment for a severance to months of water level readings for a development study.
Severance hydrogeological study (D-5-4 / D-5-5)
Starting point $5,500 – $8,500 · full span $2,500 – $17,500
A pumping test and water quality analysis for the well side (D-5-5), and the nitrate assessment for the septic side (D-5-4). Lots of a hectare or more in non-sensitive areas can keep the D-5-4 work short.
Questions that set the price: Number of new lots; Water supply; Sewage servicing.
Development hydrogeological study
Starting point $12,000 – $18,000 · full span $12,000 – $150,000
Boreholes, monitoring wells and months of water level readings, then the impact assessment and mitigation. The monitoring period is often the biggest single line in a development study.
Site area, servicing and how long groundwater has to be monitored affect the price most; the estimator asks about each one.
Construction dewatering assessment
Starting point $9,000 – $14,000 · full span $9,000 – $62,500
Inflow estimates from hydraulic testing, the area-of-influence analysis, and the EASR water taking and discharge reports when the taking exceeds 50,000 L on any day.
Questions that set the price: Excavation depth; Excavation footprint; Permit support.
Permit to Take Water (long-term taking)
Starting point $12,000 – $20,000 · full span $5,500 – $31,000
For Category 3 applications, a hydrogeological study with a pumping test, well survey, interference assessment and monitoring plan. Renewals without changes can need far less.
Questions that set the price: Water use; Water source; Permit status.
Groundwater discharge permit and foundation drainage
Starting point $3,500 – $6,000 · full span $3,500 – $15,500
Seasonal water levels, discharge volume estimates and groundwater sampling against the municipal sewer use by-law, packaged for the municipal application.
Questions that set the price: Basement levels; Discharge type.
Water balance assessment
Starting point $3,000 – $5,000 · full span $3,000 – $14,000
Monthly pre- and post-development budgets, the infiltration deficit and the LID sizing to close it. Mostly desk work unless field data has to be collected.
Questions that set the price: Site area; LID or infiltration design input.
Infiltration testing (LID)
Starting point $2,500 – $4,000 · full span $2,500 – $14,500
Field tests at each proposed LID feature, at its base elevation, with the design rate and groundwater separation reported for each.
Questions that set the price: Test locations; Boreholes.
Water supply well assessment and pumping test
Starting point $7,000 – $11,000 · full span $7,000 – $86,500
Step and constant-rate pumping tests, observation wells, the well survey and the interference and yield analysis.
Questions that set the price: Water use; Pumping test duration; Number of wells.
Hydrogeological assessment for a large septic system
Starting point $7,000 – $11,000 · full span $7,000 – $37,000
Site evaluation, deep borings, mounding analysis and the water resources impact assessment that sets boundary criteria for an ECA.
Questions that set the price: Design sewage flow; Type of development.
Source water protection risk assessment
Starting point $4,500 – $7,000 · full span $4,500 – $15,500
Confirming the zone and vulnerability, documenting the activity and site conditions, and setting out the measures that manage the risk for the risk management official.
Questions that set the price: Proposed activity; Wellhead protection area.
Groundwater monitoring and annual reporting (per year)
Starting point $4,000 – $6,500 · full span $4,000 – $61,000
Site visits, laboratory analysis, data checks and, where required, the annual report. Priced per year.
Questions that set the price: Number of monitoring wells; Monitoring frequency; Regulatory annual report.
Five worked scenarios
Where a project needs several studies, the range covers all of them; shared field work usually brings a combined quote below it.
1. Rural severance creating two lots, new test well
One study covers both guidelines. The well itself is drilled and billed by a licensed well contractor, outside this range.
Typical range: $8,500 – $13,000
2. Six-storey building with two parking levels in a city
Three requirements that share the same boreholes, monitoring wells and samples. The planning study, the EASR registration and the municipal discharge permit all draw on one field program, so a single firm doing all three usually comes in below this range.
Typical range: $35,000 – $55,000
3. Five-hectare subdivision in a recharge-sensitive watershed
Twelve months of monitoring drives the development study. The water balance sets the infiltration target and testing shows where the LID features can meet it. Installing monitoring wells and infiltration test boreholes in the same drilling program is the main saving.
Typical range: $64,500 – $98,500
4. Golf course taking from a pond and a well, plus monitoring
Two sources mean groundwater and surface water assessment for the permit. The monitoring is priced per year and only applies if the permit conditions call for it. The ministry application fee is separate.
Typical range: $25,000 – $41,000
5. Campground with a large septic system and its own well
The sewage system and the water supply have to be placed with each other in mind, since the ministry guideline advises against wells downgradient of the disposal field. Doing both assessments together lets one hydrogeologist site the field and the well from the same data.
Typical range: $25,000 – $39,000
Not in the ranges
Hydrogeological study cost ranges leave out well drilling, extended laboratory analysis, government and municipal fees, treatment and construction work, and HST.
- Well drilling. New water wells for pumping tests are drilled and billed by a licensed well contractor.
- Extended laboratory analysis. Contaminant suites beyond the routine program, or extra sampling rounds requested later.
- Government application fees. For example, the Permit to Take Water fee of $750 (Categories 1 and 2) or $3,000 (Category 3), with no fee for agricultural irrigation, frost protection or aquaculture, per the ministry's PTTW application requirements.
- Municipal fees. Sewer discharge charges, which some cities levy by volume for sanitary or combined sewers, and peer review fees.
- Treatment and construction. Dewatering treatment systems, LID features and septic systems themselves.
- HST.
How to compare quotes like for like
Hydrogeological study quotes compare like for like only when each states the boreholes and monitoring wells, monitoring period, pumping test, laboratory list, permit preparation, agency responses, meetings, disbursements and who signs.
Two quotes for "a hydrogeological study" can describe very different work. Ask each firm to state:
| Item | Why it matters |
|---|---|
| Number and depth of boreholes and monitoring wells | The largest field cost, and the basis of every conclusion |
| Monitoring period and visit frequency | A quote with one round of water levels is not comparable with one that includes the agency's minimum period |
| Pumping test length and observation wells | A six-hour test and a 72-hour test are different products |
| Laboratory parameter list and number of sampling rounds | Extended analysis can add significant cost later |
| Permit or registration preparation | Whether the EASR filing, PTTW application or municipal form is included |
| Responses to agency comments | One round of responses included, or billed by the hour |
| Meetings and pre-consultation | Scoping meetings with the municipality, conservation authority or ministry |
| Disbursements | Drilling subcontract, equipment rental and laboratory costs, marked up or at cost |
| Who signs the report | A licensed P.Geo. or exempted P.Eng. must sign and stamp it |
What legitimately lowers the cost
The cost of a hydrogeological study comes down legitimately through reused boreholes and wells, combined studies, good background information, early monitoring, confirmed scope and clear site access, never by skipping the monitoring period or the well survey.
- Reusing boreholes and wells. Geotechnical boreholes fitted with monitoring wells at useful depths, or an existing water well that meets the guideline for a pumping test, can replace new drilling.
- Combining studies. One field program can serve the development study, water balance, dewatering assessment and discharge permit, as scenarios 2 and 3 show.
- Good background information. Earlier reports, well records, environmental site assessments, survey drawings and the agency's pre-consultation comments shorten the desk work and target the field work.
- Starting monitoring early. Monitoring wells installed before the design is final let the required period run while the design continues, instead of delaying the application.
- Confirming scope before field work. A short scoping exchange with the municipality or conservation authority avoids repeating work after review.
- Site access. Clear drill access and a contact on site save mobilization time.
What does not lower the cost: skipping the monitoring period or the well survey. Submissions missing them tend to come back, and the work then has to be done anyway.
Cost questions
Is a hydrogeological study the same as a hydrogeological assessment, report or investigation?
For pricing purposes, yes: a hydrogeological study, assessment and report are the same kind of work, and municipal documents use all three names. York Region's terms of reference are for a "hydrogeological report", Peterborough's Official Plan asks for a "hydrogeological assessment", and Kawartha Lakes' Official Plan calls it a "hydrogeological study". "Investigation" usually means the field program behind the report. What sets the cost is the scope in the terms of reference, not the name.
Why is the range so wide for some studies?
Because the work scales with the site. A dewatering assessment for one basement level on a small lot and one for three levels across more than a hectare, with a Permit to Take Water, share a name but not a scope. The starting point column shows the simplest common case; the full span shows the largest.
Are government fees included?
Government fees are not included: ranges exclude government application fees and HST. The ministry's Permit to Take Water fee is $750 for Category 1 and 2 applications and $3,000 for Category 3, with no fee for agricultural irrigation, frost protection or aquaculture. Municipal fees, such as volume-based sewer discharge charges or peer review fees, are separate too.
Is drilling included?
Drilling a new water well is not: where a new water well has to be drilled for a pumping test, the licensed well contractor bills it separately. Monitoring wells installed in boreholes as part of the hydrogeological field program are part of the study scope.
Are laboratory costs included?
Routine analysis is included: the analysis a study type normally needs is part of the scope a hydrogeologist quotes. Extended analysis, for example a full contaminant suite where impacted soil or groundwater is suspected, or extra sampling rounds the agency asks for later, is usually priced separately. Ask each quote to state its parameter list.
How do I get a firm price?
Use the estimator to send your project details. A licensed hydrogeologist serving your area reviews the site and the approval authority's requirements and confirms scope and pricing before any work starts.
Can one study cover several requirements?
Often: a development hydrogeological study can carry the water balance, the dewatering assessment and the D-5-4 and D-5-5 assessments in one report, sharing boreholes and monitoring. Bundling usually costs less than separate studies.
Will peer review add cost?
Peer review can add cost: some municipalities, Barrie among them, note that a peer review may be required at the applicant's cost. That fee is charged by the municipality or its reviewer and is not part of these ranges.
Do prices differ across Ontario?
Prices do not differ across Ontario in these ranges, which are province-wide: local requirements change the scope, and scope is what moves the price. For example, a local requirement can mean a longer monitoring period or an extra assessment in a wellhead protection area. Location pages explain the local requirements but use the same ranges.
Sources
- Permits to take water: application requirements (opens in a new tab), Government of Ontario (MECP).
- Terms of Reference: Hydrogeological Report (Development Application Supporting Studies, June 2024) (opens in a new tab), York Region.
- City of Peterborough Official Plan (consolidated June 2024), sections 6.1.4 and 7.21.2 (opens in a new tab), City of Peterborough.
- Official Plan, 2012 (March 2025 office consolidation) (opens in a new tab), City of Kawartha Lakes.
- Hydrogeological Study: terms of reference (2026) (opens in a new tab), City of Barrie.
- Hydrogeology (planning application reviews) (opens in a new tab), Lake Simcoe Region Conservation Authority.