A seizure connected to atmospheric emissions can halt or limit a production activity precisely when it is necessary to understand whether the contested exceedance is real, which plant it refers to, and what consequences it may entail. Very concrete doubts may arise for you: is a single sampling sufficient? Can the measure concern the entire plant? Does technical regularization eliminate the problem? I want to help you distinguish these levels, because environmental authorization, criminal charge, and preventive seizure do not coincide.
The first distinction is between technical data and legal violation. A measured value must be read together with the conditions set in the authorization, the emission point, the analytical method, and the reference period. We will see later that seizure is not a conviction: it is a precautionary measure that requires its own prerequisites and can be subject to review within the times established by law.
When exceeding limits can become a crime
There is not a single limit valid for every plant. Article 269 of Legislative Decree No. 152 of 2006 provides that the authorization for emissions identifies, among other things, limit values, prescriptions, sampling and analysis methods, criteria for assessing the conformity of measurements, and the frequency of monitoring. Therefore, the dispute must be linked to the discipline actually applicable to that plant and that specific emission point. Article 269 of Legislative Decree No. 152/2006
The violation of a limit value can have criminal significance. Article 279, paragraph 2, punishes anyone who operates a plant in violation of the limit values provided for by the authorization, by the annexes to part five of the decree, by plans and programs, or by the legislation referred to in Article 271. The penalty indicated by the rule is arrest for up to one year or a fine of up to 10,000 euros. However, this hypothesis should not be confused with the simple non-observance of a prescription, which paragraph 2-bis treats on an administrative level, unless further violations emerge. Article 279 of Legislative Decree No. 152/2006
Absent authorization, exceeded limit, and violated prescription are different facts. Operating without the necessary authorization, continuing with an expired, suspended, or revoked title, exceeding an emission limit, and failing to comply with a technical prescription are not interchangeable formulas. The legislative decree distinguishes the conduct and the relative consequences. If the plant is subject to integrated environmental authorization, moreover, the same Article 279 refers to the sanctioning discipline proper to IEA: automatically applying the rule of ordinary emissions would be a mistake.
Why preventive seizure may be ordered
Preventive seizure serves to prevent a current danger connected to the asset. Pursuant to Article 321 of the code of criminal procedure, the measure can affect a thing pertaining to the crime when its free availability risks aggravating or prolonging the consequences of the crime or facilitating other crimes. In a dispute concerning emissions, the question is not only whether there is an assumption of violation, but also whether the availability of a plant, a production line, or the entire plant maintains that danger.
Seizure alone does not prove criminal responsibility. It is a real precautionary measure, adopted during the proceedings to prevent certain effects. The decree must therefore indicate the contested fact, the bound assets, and the reasons why the use of those assets is considered dangerous. The full closure of a plant and the restriction on a single facility do not produce the same impact and do not necessarily require the same concrete justification.
The qualification of the measure changes the available remedies. First of all, one must read whether the decree orders preventive seizure or evidentiary seizure, intended for the acquisition of items of evidence. This guide deals mainly with the former. The fact that machinery, filters, conduits, registers, or the entire production area have been seized also affects the reasoning: each asset must have an explained connection with the contested hypothesis and with the danger that the measure intends to avoid.
Technical data cannot be read in isolation
A value detected above the threshold must be compared with the correct parameter. The concentration indicated in a report can depend on operating conditions, sampling times, flow rate, temperature, reference oxygen, or other methods provided for by the authorizing title. It is not enough to compare two numbers if the authorization imposes a time average, a specific method, or operating conditions different from those of the control.
The relationship between sampling and activity actually carried out matters. A newly started plant, a start-up phase regulated by the authorization, extraordinary maintenance, or a breakdown do not automatically authorize exceeding the limits. However, they can be necessary facts to understand what happened, whether the measurement represents ordinary operation, and whether the requested communications, prescriptions, and precautions were respected.
Correcting the plant is useful but does not automatically cancel the past. The replacement of a filter, the modification of combustion, or the interruption of the affected line can impact the future risk that justifies the seizure. However, the assessment of the already contested violation, the compliance of the performed intervention, and the persistence of the precautionary prerequisites remain to be distinguished. Presenting an adjustment as if it resolved every issue, without documenting its content and effectiveness, can weaken the defensive position.
Review, revocation, and other steps after seizure
A review is provided against preventive seizure. Articles 322 and 324 of the code of criminal procedure allow requesting the court's control over the decree. The request must be presented within ten days of the execution of the measure or from the different date on which the interested party became aware of the seizure. The deadline is short: it should not be confused with the time necessary to complete every technical intervention in the plant. Articles 322, 322-bis and 324 of the Italian Code of Criminal Procedure
The review serves to challenge the prerequisites of the restriction. It can concern, for example, the connection between the seized assets and the crime hypothesis, the topicality of the danger indicated in the decree, the extension of the seizure, or the motivation of the measure. It is not sufficient to state that the seizure creates economic damage: that damage explains the interest in the removal of the restriction, but does not replace the legal and technical reasons that must be addressed.
The interest of those who are not owners must also be explained in a concrete way. The United Sections of the Court of Cassation have specified that the person under investigation may propose a review if they allege a concrete and current interest connected to the effects of the removal of the seizure on their position. This point can be decisive when the asset, production activity, and corporate roles do not coincide in the same person. Court of Cassation, Joint Divisions, judgment No. 7983 of 27 February 2026
Revocation requires a relevant change in prerequisites. If the precautionary reasons cease after the seizure, the law provides for the possibility of requesting the revocation of the restriction. In matters of emissions, the decisive aspect is not the mere declaration of having performed maintenance: it is necessary to understand whether the source of risk has been truly eliminated and whether the residual activity can take place without reproducing the contested situation.
What elements truly change the response
The authorizing decree is often the starting point. It is necessary to identify which title governs the plant, which emission sources it contemplates, which limits it sets, and under what conditions they must be respected. Any plant modifications, renewals, transfers, communications, and subsequent prescriptions are also relevant. An authorization referring to a production setup different from the one actually operated can pose a problem distinct from mere numerical exceedance.
Reports and analyses must be readable in their entirety. The date of the control, the sampling point, the chain of custody of the sample, the method used, the conditions of the plant, and the reported calculations make it possible to understand what an assessment actually certifies. An internal graph or a maintenance register does not automatically refute an official sampling, but can have meaning if they allow reconstructing a precise technical fact.
Subsequent business decisions require consistency. Continuing operations, modifying plants, or using restricted assets without considering the content of the decree can aggravate the problem. At the same time, indiscriminately suspending all activity is not always the only possible consequence. The point is to understand which assets are affected, which use is prohibited, and whether the indicated danger concerns a specific emission source or the overall setup of the plant.
How to approach initial decisions
The priority is to distinguish acts and respect deadlines. Seizure decree, execution report, provisional charge, environmental authorization, and analytical results answer different questions. Keeping them organized makes it immediately possible to identify whether the discussion concerns the authorizing title, a limit, a prescription, or the topicality of the risk. In the presence of a preventive seizure, the deadline for review leaves no room for delays.
Criminal defense and environmental regularization must remain consistent. A technical intervention may be necessary to prevent new irregular emissions, while the proceedings require clarifying whether the contested fact is configurable and whether the restriction is still justified. The two activities are not alternatives, nor are they automatic proof of each other. If you must face a measure of this type, you can contact me to evaluate the content of the acts and the practically viable options.
Frequently asked questions
Is an occasional exceedance of the emission limit always a crime?
Defining it as occasional is not enough to exclude the problem. It is necessary to see which limit value applies, with what reference period, under what conditions, and according to which method of analysis. If the elements of Article 279, paragraph 2, are met, the exceedance can have criminal relevance; a violation of a prescription alone generally follows a different sanctioning discipline.
Does plant seizure equate to definitive closure?
No, preventive seizure is not a definitive closure. It is a precautionary restriction ordered in criminal proceedings and remains tied to its prerequisites. The practical effect depends on the assets indicated in the decree: it can concern the entire plant or a part of the facility. The measure can be subjected to review and, if precautionary reasons cease, to a request for revocation.
Can I request a review even if the assets belong to the company?
It may be possible, but you must indicate your concrete interest. The person whose assets were seized or who would be entitled to restitution has standing to react; for the investigated person who does not coincide with the owner, Cassation requires a concrete and current interest in the effects of the removal of the restriction on their position.
By when must I request the review of the preventive seizure?
The request must be presented within ten days. The deadline runs from the execution of the seizure or, if different, from the date on which the interested party became aware of it. Since the deadline is short, it is important not to wait for the completion of every technical intervention before considering the procedural remedy, which remains distinct from any subsequent request for revocation.
Does replacing the filter automatically cause the seizure to be revoked?
No, replacement does not produce an automatic revocation. However, it can be relevant if it verifiably eliminates the source of danger that justified the restriction. One must distinguish the compliance of the new setup with environmental prescriptions from the assessment of the already contested fact: these are different levels, which can have different effects in the proceedings.