When is an Environmental Impact Study required?

An EIS is required when a proposed development may affect natural heritage features, watercourses, wetlands, or species at risk; the need is determined during pre-consultation with Planning Services.

Who reviews and enforces EIS requirements?

Planning Services and By-law Enforcement administer municipal review; conservation authorities and regional/provincial agencies may have concurrent roles depending on the feature and applicable legislation.

What if my project started without an approved EIS?

Stop work and contact Planning Services and By-law Enforcement immediately to understand inspection, remediation and potential enforcement actions.

EIS Requirements for Major Projects - St. Catharines Bylaw

Environmental Protection Ontario 4 Minutes Read · published May 26, 2026

St. Catharines, Ontario requires Environmental Impact Studies (EIS) for many major development proposals that may affect natural heritage, watercourses, or sensitive environmental features. This article explains when an EIS is typically requested by Planning Services, what standards and provincial policy influence the scope, how the city reviews submissions, and practical next steps for applicants and consultants. For official guidance and local submission requirements consult the City of St. Catharines Planning Services pages for development applications City of St. Catharines - Planning Services^[1] and the applicable regional and provincial policy referenced below.

When an EIS Is Required

An Environmental Impact Study is generally required where a proposed project could impact natural heritage features, Provincially Significant Wetlands, watercourses, woodlands, or threatened and endangered species. The requirement is triggered during pre-consultation for planning approvals such as site plan control, official plan amendments, zoning bylaw amendments, and subdivision or condominium applications. The exact triggers and thresholds are defined by Planning Services and by regional natural heritage policies.

Engage the city early in pre-consultation to confirm EIS scope and submission requirements.

Scope and Technical Standards

The scope of an EIS depends on site-specific features and the proposed development. Typical elements include baseline ecological inventory, impact assessment, mitigation measures, monitoring recommendations, and a professional signature with qualifications. Provincial guidance such as the Provincial Policy Statement shapes the objectives for natural heritage protection, while regional and municipal guidelines identify local priorities and methodologies.

Penalties & Enforcement

Enforcement and penalties for non-compliance with EIS requirements, unauthorized disturbance of natural heritage features, or failure to follow approved mitigation are handled through municipal enforcement and may involve provincial authorities when provincial policies apply. Specific monetary fines, escalation rules, and timelines for appeals are not fully summarized on the cited city planning pages; see the cited sources for any published figures or bylaw references below. Provincial Policy Statement 2020^[3]

Fines: not specified on the cited page; consult By-law Enforcement and the consolidated Municipal Code for amounts and daily penalties.
Escalation: first and repeat offence treatment is not specified on the cited planning pages.
Non-monetary orders: remediation orders, stop-work orders, restoration directives and court action are typical enforcement tools; specific procedures are set out by enforcement authorities.
Enforcer: Planning Services and By-law Enforcement lead municipal review and enforcement; provincial ministries may act where provincial policy is engaged.
Inspection & complaints: report suspected unauthorized works to the City of St. Catharines enforcement contacts (see Resources).
Appeals: appeals or reviews of planning decisions are subject to Planning Act timelines and procedures or to the statutory appeal routes noted on decision notices; specific time limits are not specified on the cited planning pages.

If work has begun without an approved EIS, stop work and contact Planning Services immediately.

Applications & Forms

Applicants normally file EIS documents as part of a broader planning application (site plan, zoning amendment, subdivision) following pre-consultation with Planning Services. The City publishes application forms and checklists for development applications; specific EIS terms of reference or submission checklists may be included in planning application guides or regional guidance Niagara Region - Natural Heritage^[2].

Forms: planning application forms and checklists are available from Planning Services; the city page lists application types and submission requirements.
Fees: application fees for planning approvals apply; fee schedules are published by the city.
Deadlines: submission deadlines align with application intake and review timelines; confirm during pre-consultation.

How the City Reviews an EIS

Review is typically multi-stage: initial completeness check, technical review by Planning Services and other internal departments, circulation to conservation authorities and regional agencies where applicable, and decision tied to the associated planning application. Reviews often require peer review by a qualified third-party consultant, revisions to mitigation measures, and conditions of approval tied to monitoring and long-term management.

Action Steps for Applicants

Request pre-consultation with Planning Services to confirm whether an EIS is required and to receive terms of reference.
Engage a qualified environmental consultant to prepare the EIS and ensure it follows city, regional and provincial guidance.
Submit the EIS with the formal planning application and required supporting materials.
Respond promptly to peer review comments and conditions of approval; obtain any required permits from conservation authorities.

Peer review requests are common for complex or high-risk natural heritage sites.

FAQ

When is an Environmental Impact Study required?: An EIS is required when a proposed development may affect natural heritage features, watercourses, wetlands, or species at risk; the need is determined during pre-consultation with Planning Services.
Who reviews and enforces EIS requirements?: Planning Services and By-law Enforcement administer municipal review; conservation authorities and regional/provincial agencies may have concurrent roles depending on the feature and applicable legislation.
What if my project started without an approved EIS?: Stop work and contact Planning Services and By-law Enforcement immediately to understand inspection, remediation and potential enforcement actions.

How-To

Contact Planning Services for pre-consultation to confirm EIS triggers and scope.
Hire an accredited environmental consultant to prepare a terms-of-reference and draft EIS.
Submit the EIS with the complete planning application and required supporting documents.
Address peer review and agency comments, revise the EIS as required, and comply with conditions of approval.

Key Takeaways

Early pre-consultation with Planning Services reduces delays and clarifies scope.
Follow city, regional and provincial guidance to minimize enforcement risk and appeals.