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SETENA Procedures

Other SETENA Forms and Environmental Assessment Routes

Some projects follow specific environmental procedures because of their activity, scale, or institutional status. Here we explain the routes for marine aquaculture, desalination systems, and government projects eligible for priority review.

Marine Aquaculture Assessment based on the scale, production, and characteristics of the aquaculture operation
Desalination Assessment instrument determined by system flow rate
Government Projects Priority review for certain public-sector projects
Not All Projects Follow the Same Route

Some Activities Have Specific Environmental Procedures

Form numbers do not represent a sequence of procedures. Each route is determined by the type of activity, its scale, and the specific conditions under which it is carried out.

D5 · Marine Aquaculture

Environmental assessment based on the scale of the aquaculture operation

Marine aquaculture projects follow a specialized route whose category depends on production, area, species, and site conditions.

D1 · Desalination

Assessment based on system flow rate

Desalination projects have specific environmental requirements, and the applicable instrument depends primarily on the maximum planned flow rate.

D3 · Priority Review

Government projects eligible for priority review

Certain public investment projects may receive priority in the environmental review process while retaining the assessment instrument required by their classification.

D1, D3, D4, D5, and D6 Are Not Consecutive Steps. These designations refer to different routes, activities, or conditions within SETENA's Environmental Impact Assessment system.
D5 · Marine Aquaculture

Marine Aquaculture Projects Are Classified by Scale

D5 is the specialized instrument for assessing the environmental impacts of aquaculture operations located directly in the sea. The applicable scale is determined by the characteristics of the operation, production, area, and site conditions.

D5-SF

Social and Family Scale

This corresponds to the social and family scale and uses an Environmental Registration under the specific regulatory framework for marine aquaculture.

D5-PE

Small Scale

Projects with low potential environmental impact managed through a Sworn Declaration of Environmental Commitments.

D5-ME

Medium Scale

Projects at this scale require an Environmental Forecast and Management Plan appropriate to their characteristics and impacts.

D5-GE

Large Scale

This applies to projects with higher production and potential impact and requires preparation of an Environmental Impact Assessment.

Project Classification

Scale Should Not Be Determined by Guesswork Alone

SETENA provides a guidance tool that relates species, area, and production to establish the project's preliminary scale. The final classification may be adjusted during application review.

Marine Aquaculture Regulations Were Updated in 2026. Executive Decree No. 45743-MINAE amended the requirements for the different D5 scales. Applications must therefore use the currently applicable forms and terms of reference.
D1 · Desalination

Desalination Systems Follow a Specific Environmental Route

Any work, activity, or project involving desalination must complete the environmental approval procedure. The required instrument is determined by the scale of the system and the maximum flow rate to be used.

01

0–5 L/s

For this flow-rate range, the regulatory classification requires D1 accompanied by a Sworn Declaration of Environmental Commitments.

02

5–20 L/s

For this flow-rate range, the prescribed instrument is D1 accompanied by an Environmental Forecast and Management Plan.

03

20 L/s and Above

Higher-flow projects are assessed through D1 accompanied by an Environmental Impact Assessment.

01
Water Intake The origin and characteristics of the water source must be assessed.
02
Treatment Plant The infrastructure and technology used to produce desalinated water are characterized.
03
Marine Environment The location must take into account sensitive ecosystems and environmental conditions at the site.
04
Brine Concentrate disposal and dilution are among the relevant environmental variables.
D3 · Government Projects

D3 Means Priority Review, Not a Lower Level of Environmental Assessment

Certain public investment projects may be designated as government projects with D3 priority. The environmental instrument they must submit remains the one determined by the project's classification and assessment.

Concession

Public Investment Through Concessions

Projects developed under concession arrangements covered by the applicable regulations.

APP

Public-Private Partnership

Government-initiated projects developed through public-private partnerships.

Procurement

Public Procurement

Certain public activities, works, or projects developed through public procurement procedures.

Social Housing

Affordable Social Housing

Social housing projects covered by Article 5 may also qualify for D3 priority.

How It Works

Determine the Environmental Instrument First, Then Establish D3 Priority

The project must first be classified according to its activity and environmental significance. Once the appropriate assessment is identified, the form indicates that it is a government project eligible for D3 priority.

Priority Does Not Mean Automatic Approval. D3 designation affects the application's review priority but does not eliminate the studies, measures, or environmental requirements applicable to the project.
Identify the Route Before Applying

The Project Activity Determines the Environmental Route

Marine Cultivation

Marine Aquaculture Project

We first identify the species, production, area, and scale of the operation to determine its D5 category.

Water Production

Desalination Project

The system flow rate and the project's environmental characteristics determine the applicable D1 instrument.

Public Investment

Government Project

We first identify the environmental assessment instrument normally applicable to the project and then verify whether D3 priority applies.

Does Your Project Fit None of These Routes?

It May Require a Different Environmental Assessment Route

We can review the project's activity, location, size, and characteristics to determine whether D1, D1-C, D1-Torres, D4, D6, or another procedure applies.

Starting Point

A Complete Application Is Not Needed to Begin the Review

An initial review of basic information allows us to identify the appropriate environmental route before determining which documents and studies the project actually requires.

01
Location Coordinates, a survey plan, map, or clear site reference.
02
Type of Activity What will be built, installed, cultivated, or developed.
03
Size or Capacity Production, flow rate, area, or preliminary scale, depending on the project.
04
Project Developer Individual, company, or institution responsible for the project.
05
Available Design Existing plans, diagrams, or preliminary information.
06
Background Information Previous institutional guidance, studies, or applications.
Our Process

We Identify the Route Before Preparing the Application

01

Understand the Project

We review the activity, location, scale, and key characteristics.

02

Identify the Regulations

We determine which specific environmental regulatory framework applies.

03

Determine the Assessment Instrument

We identify the relevant form, scale, or technical assessment instrument.

04

Coordinate Studies

We integrate only the technical components required for the case.

05

Prepare the Application

We organize the technical, cartographic, and administrative documentation.

06

Support the Procedure

We provide technical support throughout the SETENA procedure within the agreed scope.

Institutional Framework

Specialized Procedures Within Environmental Impact Assessment

Although these routes have their own requirements, all form part of the system through which SETENA assesses the environmental impacts of activities, works, and projects.

National Environmental Technical Secretariat

SETENA

Each Route Has Its Own Regulatory Basis and Requirements

Marine aquaculture, desalination, and government projects are subject to different regulatory frameworks. Applications must use the current regulations and forms applicable to each activity.

Geo Costa Rica provides technical preparation and coordination, while SETENA is responsible for reviewing the application and issuing the corresponding administrative decision.

Principal Regulations
D5
Marine Aquaculture Executive Decree No. 42755-MINAE, as amended by Decree No. 45743-MINAE.
D1
Desalination Desalination Systems Regulation and Executive Decree No. 43956.
D3
Government Projects Article 5 of Executive Decree No. 43898-MINAE-S-MOPT-MAG-MEIC.
Frequently Asked Questions

Special Forms and Environmental Procedures Through SETENA

Are D1, D3, D4, D5, and D6 Consecutive Stages?

No. They refer to different forms, conditions, or routes within the environmental assessment system and should not be interpreted as a sequence.

How Do I Know Which D5 Scale Applies to a Marine Aquaculture Project?

Classification considers variables such as species, area, and production. SETENA provides an indicative calculator, and the classification is verified during application review.

Does Every Desalination System Require Environmental Assessment?

The Desalination Systems Regulation establishes the requirement for environmental approval for works, activities, or projects involving desalination.

Is D3 a Simpler Environmental Form?

No. D3 designates certain government projects for priority review. The applicable environmental instrument still depends on the project's classification.

Does D3 Priority Guarantee Approval?

No. Priority concerns the order of review, not the outcome of the Environmental Impact Assessment.

What Information Do You Need to Identify the Correct Route?

We can usually begin with the location, a description of the activity, dimensions or capacity, developer information, and any available designs or background documents.

Other SETENA Forms

Does Your Project Have Special Characteristics, and Are You Unsure Which Environmental Procedure Applies?

We review the activity, location, scale, and background information to identify the appropriate environmental procedure before determining the studies and documents needed.

Geo Costa Rica

Let's Review Your Project

Send us the location, a description of the activity, preliminary dimensions or capacity, and any technical documentation already available.