CAEN Code Rev. 3

3700

Collection and treatment of wastewater

EU NACE Equivalent: NACE Rev. 3 — 3700

This code covers the collection, transport and treatment of wastewater (domestic, industrial, stormwater) through sewerage networks, treatment plants and treatment systems. It includes the management of sludge resulting from treatment processes, as well as the maintenance of related infrastructure. It is essential for companies operating public sanitation services or private water treatment systems.

Entrepreneur Profile

Acest cod este destinat operatorilor de servicii publice de apă și canalizare, companiilor private care dețin și operează stații de epurare, precum și firmelor specializate în întreținerea infrastructurii de canalizare. De asemenea, este util pentru societățile care prestează servicii de epurare pentru platforme industriale sau ansambluri rezidențiale.

Who should avoid:

Avoid the exclusive use of code 3700 if the main activity of your company shifts towards other commercial or related branches not specified in the official description. See the excluded activities section below.

Authorization procedure and Trade Register aspects for NACE 3700

Setting up a company that will carry out the activity of collection and treatment of wastewater (NACE 3700) involves going through the standard formalities at the National Trade Register Office (ONRC), with specific mentions related to the object of activity and prior approvals. At registration, a declaration on own responsibility according to Law 359/2004 on fulfilling operating conditions is submitted, and for NACE 3700 it is mandatory to obtain the environmental opinion from the territorial Environmental Protection Agency (APM). Without this opinion, the Trade Register will not fully register the object of activity. Also, the company's articles of association must explicitly include the activities of collection, transport and treatment of wastewater, mentioning the installations and networks used.

For authorized natural persons or individual enterprises, the same conditions for prior authorization apply. At ONRC, the standard application form is completed, accompanied by proof of registered office, constitutional documents and, where applicable, the lease or concession contract for the land/treatment plants. We recommend consulting the ONRC Guide for NACE classes with environmental impact, as any omission regarding approvals leads to rejection of the file.

Regulatory framework, specific approvals and control institutions

The activity of wastewater collection and treatment is strictly regulated by Water Law no. 107/1996, Emergency Ordinance no. 195/2005 on environmental protection, and the technical norms issued by the Ministry of Environment. The operator must obtain the water management permit from the National Administration Romanian Waters (ANAR) – water directorates, as well as the environmental permit issued by the APM. Without these, operation is illegal and entails contraventional sanctions.

The main control institutions are the National Environmental Guard (for compliance with emissions and waste), ANAR (for compliance with the use of water resources) and the Public Health Directorates (for the quality of drinking water and treated water). Also, the Tax Authority (ANAF) can carry out fiscal controls regarding the correct declaration of income and VAT. Operators must keep strict records of collected water quantities, treatment parameters and final discharges, reporting periodically to the authorities.

Fiscal management, ANAF audit risk and specific accounting

From a fiscal point of view, companies with NACE 3700 are subject to the Fiscal Code and the standard VAT regime (19% rate for treatment services, except exemption cases). The fiscal vector is completed with obligations regarding income or profit tax, VAT, dividend tax and salary contributions. We recommend quarterly submission of D100 and D300 declarations, and for transactions with the state, the RO e-Factura system is used for invoices issued to local authorities and state-owned companies.

The risk of ANAF audit is high, as the activity involves subsidies, European funds and regulated tariffs. Companies that receive compensation for the public water and sewer service must keep separate accounting by cost center, according to ANRSC norms. During control, ANAF verifies the correct classification of investment expenses (amortization of treatment plants) and the deduction of VAT for equipment purchases. We recommend preparing a complete fiscal file, with justifications for each operation, and updating contracts with ANAF for advance payments. In case the company also provides domestic sewerage services, a reduced VAT rate of 5% applies for social housing, but only with prior approval from the Ministry of Finance.


Included Activities

  • ✅ Collection of domestic, industrial and stormwater wastewater through sewer networks
  • ✅ Transport of wastewater to treatment plants
  • ✅ Treatment of wastewater through mechanical, biological and chemical processes
  • ✅ Treatment and disposal of sludge resulting from treatment
  • ✅ Maintenance and repair of sewer networks and treatment plants
  • ✅ Operation of pumping systems and settling tanks

Excluded Activities

  • ❌ Construction of sewer networks and treatment plants (code 4221)
  • ❌ Collection and treatment of hazardous wastewater (code 3822)
  • ❌ Septic tank emptying and cleaning services (code 3811)
  • ❌ Research and development activities in the field of water treatment (code 7219)

Similar or Related CAEN Codes:

From the same category of economic activities:

Întrebări Frecvente

What authorizations are required to carry out activities under NACE code 3700?

It is necessary to obtain the environmental permit from the Environmental Protection Agency, the water management permit from the National Administration Romanian Waters, as well as the sanitary approval from the Public Health Directorate. Also, for the possession and operation of treatment plants, a fire safety permit is required.

What are the specific taxes and fees for this NACE code?

In addition to income or profit tax, a tax for the use of water resources (according to Law 107/1996) and a contribution for water management are applied. Also, standard VAT (19%) is charged for treatment services. Operators must also pay the sanitation tariffs set by local authorities.