Last updated: October 5, 2026
A sewage tank needs a permit before it goes in the ground. Not after. Not at inspection. Before.
That rule catches people on replacements. A pump dies, you swap it, no permit. A tank cracks, you swap it, and you are back in the permit system from the start. Alberta’s Provincial Private Sewage Administrator settled this in STANDATA 23-PSB-001, issued August 2023. The bulletin states that “the installation of a sewage tank is deemed to be an undertaking to which the permit regulation and the requirement of a private sewage permit apply.” It then closes the side door: sewage tanks “would not be considered ‘equipment’,” so the exemption that covers pumps and controls does not reach them.
Order accordingly. The tank is the easy part. The paperwork sets your schedule.
This page is for the party buying the tank: the installer, the excavator, the acreage builder, the developer putting services into unserviced lots. It covers who may hold the permit, what the clearance table allows, how daily volume sets tank size, and how long the permit lives. It does not cover tank ratings or burial depth. Those sit on the product page.
Who Is Allowed to Pull the Permit
Three parties. No others.
| Applicant | Scope |
|---|---|
| Certified private sewage installer | Any system type the certificate covers |
| Owner who resides, or intends to reside, in the single-family dwelling served | That dwelling’s system only |
| Owner of a farm building | That farm building’s system |
The guideline language is narrow: “a certified private sewage installer, an owner who resides or intends to reside in a single-family residential dwelling where the private sewage system serves that dwelling, or an owner of a farm building.”
Read what is missing. A general contractor is not on the list. A builder is not on the list. An excavator with a hoe and twenty years of tanks is not on the list. If you hold none of those three positions, the permit is pulled by someone who does, and your crew works under it.
Certification is not optional for the installer route. The province is explicit: “You must hold a Certificate of Competency by the Government of Alberta to obtain a permit to install a private sewage disposal system.”
Two Certificates, Two Different Jobs
The Certificate of Competency comes in two classes, and the difference decides which of your jobs an installer can take.
| Certificate | What it permits | Renewal |
|---|---|---|
| Private Sewage Certificate | Permits for all types of private sewage disposal systems | Renewed when the Standard of Practice changes, typically a five-year cycle, with update training |
| Restricted Private Sewage Certificate | Permits for holding tank systems only | Does not need to be renewed |
The Alberta Onsite Wastewater Management Association is currently the only training provider approved by the Government of Alberta. There is one pipeline into this trade.
The practical read: a restricted holder can put in a holding tank and nothing else. If the design has a field, a mound, or an at-grade component, the restricted certificate stops at the tank. Confirm the class before you confirm the delivery date. A tank sitting on site while the permit question gets sorted is a tank you are storing, not installing.
Sizing Is Set by Bedrooms, Not by Guesswork
Daily volume drives tank selection. The Standard of Practice fixes the arithmetic so it is not a judgment call.
For single-family dwellings and duplexes, Table 2.2.2.2.A sets the peak expected daily wastewater volume at 340 L (75 Imp. gal.) per person per day. Occupancy is then counted off the bedroom schedule:
| Bedrooms | Persons counted |
|---|---|
| Two or fewer | 2 per bedroom |
| Three or more | 1.5 per bedroom |
For residential occupancy other than single-family, the standard uses a mean daily volume of 228 L (50 Imp. gal.) per person.
Work one case. A four-bedroom house sits in the three-or-more band, so it counts 1.5 persons per bedroom, or six persons. Six persons at 340 L is 2,040 L per day of peak expected volume. That figure is the input to tank selection, and it is the figure an inspector can reproduce from the house plan without asking you anything.
Note the step in the table. A three-bedroom house counts 4.5 persons. A two-bedroom counts 4. Adding the third bedroom adds half a person, not two. Builders who assume bedrooms scale straight up oversize the tank and overpay. Builders who assume the small band continues undersize it and fail.
Our precast septic tanks are specified against that daily volume. Send the bedroom count and the occupancy type with the enquiry and the working capacity question answers itself.
Clearances: Loose at the Tank, Tight at the Field
This is where published advice goes wrong most often. Popular acreage articles circulate setbacks that are not Alberta’s. The real table is more permissive at the tank than most people expect, and stricter at the treatment component.
| Component | Water source or well | Watercourse | Property line | Building |
|---|---|---|---|---|
| Septic tank or holding tank | 10 m (33 ft.) | 10 m (33 ft.) | 1 m (3.25 ft.) | 1 m (3.25 ft.) |
| Lift station | 10 m (33 ft.) | 10 m (33 ft.) | 1 m (3.25 ft.) | 1 m (3.25 ft.) |
| Disposal field | 15 m (50 ft.) | 15 m (50 ft.) | 1.5 m (5 ft.) | 10 m (33 ft.) to a basement, cellar or crawl space; 5 m (17 ft.) to a building on a permanent foundation |
| Mound | 15 m (50 ft.) | 15 m (50 ft.) | 3 m (10 ft.) | 10 m (33 ft.) |
| At-grade (LFH) | 15 m (50 ft.) | 15 m (50 ft.) | 3 m (10 ft.) level or under 1% slope; 6 m (20 ft.) downslope at 1% or more | 10 m (33 ft.) |
| Open discharge | 50 m (165 ft.) | 45 m (150 ft.) | 90 m (300 ft.) | 45 m (150 ft.) |
A municipal water supply well pushes the field, mound, at-grade and open discharge components out to 100 m (330 ft.).
Three readings worth carrying into a site meeting.
First, the tank is a 1 m neighbour. One metre to the property line, one metre to the building. Crews who hold the tank ten metres off the house out of habit are giving up yard for nothing and often pushing the field somewhere worse.
Second, the field is what governs the lot. Fifteen metres to a well, 10 m to anything with a basement, and 100 m to a municipal supply well. On a tight parcel the field position is fixed first and the tank follows it.
Third, open discharge is effectively finished on subdivided land. Ninety metres to a property line is a number most titled lots cannot produce. Treat it as an acreage-only option and design around it.
Article 2.1.2.4 adds a separate rule for specific surface waters: soil-based treatment components stay not less than 90 m (300 ft.) from the shore of a lake, river, stream or creek, with exceptions where principal buildings intervene.
The clearances stack. A well on the parcel throws a 10 m circle around itself for the tank and a 15 m circle for the field, and those circles do not overlap usefully on a small lot. The field also has to clear the house by 10 m where there is a basement, which on most rural builds pushes it to the back half of the parcel. The tank then sits between the house and the field, close to both, because it is allowed to. Layouts that start at the tank and work outward tend to fail. Layouts that place the field first and bring the tank back toward the building tend to pass on the first submission.
The Permit Clock Runs Short
Two time limits govern the job, and both are shorter than most schedules assume.
| Item | Requirement |
|---|---|
| Start of work | “The permit must be issued prior to starting the work.” |
| Permit life | “Most private sewage disposal system permits expire within 90 days.” |
| Inspection booking | Contact the permitting agency 2 to 5 days before the anticipated inspection date |
| Soil-based systems | Application includes a completed site evaluation and system design report |
Ninety days sounds generous until frost is in the plan. A permit pulled in early autumn against a tank that has not been ordered can expire before the hole is open. Pull the permit against a confirmed delivery window, not against an intention.
The site evaluation and system design report are application documents for soil-based treatment systems. They are produced before the permit exists, which means the design decisions are locked before anything is dug. That is the opposite of how flatwork runs, and it is the single biggest scheduling difference between a septic job and a slab.
Order of Operations
The sequence is fixed by the permit rules, not by preference.
- Site evaluation. Soil and site conditions are assessed on the parcel.
- System design report. The design is produced against that evaluation and the daily volume calculation.
- Permit application. The certified installer, resident owner or farm building owner applies, with the evaluation and design report attached for soil-based systems.
- Permit issued. Only now does work start.
- Tank delivered and set against the approved layout.
- Inspection booked 2 to 5 days ahead and completed inside the permit’s life.
Two of those six steps are ours, and they are the two at the end. The first four decide whether the last two happen on schedule. A buyer who calls for a tank before the design report exists is calling at step five about a job sitting at step two.
That matters for lead time. Tanks are produced to the specification the design report sets, so the specification has to exist before production can be slotted. Send the daily volume calculation and the approved layout with the enquiry and the tank can be built against a real delivery date rather than a placeholder.
What Gets Checked
Tank construction and materials requirements sit in Section 4.2 of the Standard of Practice, split across objectives and design standards, prescriptive requirements and installation standards, and requirements for materials. Read that section against the submittal before the tank ships, not after it lands.
Watertightness is the item that decides whether a tank passes. A monolithic precast tank has no seam at the waterline to open up later, which is the same argument that runs through precast versus cast-in-place on any buried structure. Plant certification is the other half of that answer, and the categories a plant holds are covered in our specifier’s guide to CPCQA categories.
Where this page stops: it covers the permit, the clearances and the sizing input. It does not cover tank structural ratings, burial depth against traffic, or service life. Those belong on the product page.
FAQ
Do I need a permit to replace an existing septic tank in Alberta? Yes. STANDATA 23-PSB-001 deems installing a sewage tank an undertaking requiring a private sewage permit, and states that sewage tanks are not considered “equipment.” The equipment-replacement exemption that covers pumps and controls does not apply to tanks.
Can a homeowner pull the permit themselves? Only in defined cases. An owner who resides or intends to reside in the single-family dwelling served by the system may apply, as may the owner of a farm building. Otherwise the permit is pulled by a certified private sewage installer.
How close can a septic tank be to a property line in Alberta? 1 m (3.25 ft.). The same 1 m clearance applies to a building. Water sources and watercourses require 10 m (33 ft.).
How is septic tank size determined? By peak expected daily volume. Single-family dwellings and duplexes are calculated at 340 L (75 Imp. gal.) per person per day, with occupancy counted at 2 persons per bedroom up to two bedrooms and 1.5 persons per bedroom at three or more.
How long is a private sewage permit valid? Most private sewage disposal system permits expire within 90 days. Work cannot begin before the permit is issued.
Does the installer need a certificate? Yes, to obtain the permit. A Private Sewage Certificate covers all system types. A Restricted Private Sewage Certificate covers holding tank systems only.
Specify It, Then Order It
Send the bedroom count, the occupancy type, the site constraints and the target install window. We return the tank specification and a lead time against it.
Drawings and spec sheets go out on request. Quantity pricing applies on multi-unit and development work. If the permit route is still open, confirm the certificate class your installer holds before the delivery date is set.
Other buried precast runs the same way, from trench drain classes and lead times to tanks. Specify first. Order second. Decades of Alberta installs have not changed that order.
Sources
- Alberta Private Sewage Systems Standard of Practice 2021 — Safety Codes Council
- STANDATA 23-PSB-001, Permit Required for Sewage Tanks — Alberta Municipal Affairs
- ASCA PSDS Permit Application Guideline 2022 — Alberta Safety Codes Authority
- Private Sewage Systems Installer certification — Government of Alberta alis