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Industrial wastewater regulations Spain

Industrial wastewater regulations in Spain

The discharge of industrial wastewater is a regulated process in Spain in order to protect water quality and preserve the environment. There are two types of discharges: those directed to public watercourses, such as rivers or lakes, and discharges to the sewage network leading to Wastewater Treatment Plants (WWTP). Below, we detail the steps and requirements necessary to obtain the discharge authorization and comply with current regulations:

Regulations for the discharge of industrial wastewater to public watercourses in Spain

Industrial facilities that discharge wastewater into public water bodies, such as rivers, lakes, lagoons or groundwater, must obtain a discharge authorization that establishes conditions and limitations to protect water quality and the environment.

In Spain, the applicable regulations for the management of industrial wastewater discharges to public water bodies include several laws and regulations, such as Order AAA/2056/2014, which establishes the requirements and procedures for obtaining the necessary authorization, the European Directive on Urban Wastewater Treatment (91/271/EEC) or the Water Law Law 1/2001.

Each river basin authority is responsible for overseeing and monitoring compliance with wastewater discharge regulations within its jurisdiction.

What is the quality of my industrial wastewater to be discharged into a public watercourse?

In general, the parameters to be met are as follows:

ParameterFormulaMaximum allowable level*
Biochemical Oxygen Demand after 5 daysBOD 525 mg/L
Chemical Oxygen DemandCOD125 mg/L
Total Suspended SolidsTSS35 mg/L
Total phosphorusP Total2 mg/L
Total nitrogenN Total15 mg/L
* Indicative data, may vary according to the corresponding jurisdiction.

Regulations for the discharge of industrial wastewater to the sewage system in Spain

Industrial facilities that discharge wastewater into public sewage systems must also obtain a discharge authorization.

In Spain, the applicable regulation is the autonomous community regulation, and each municipality is responsible for supervising and controlling compliance with the regulations on discharges to the wastewater sewage network within its jurisdiction.

What quality must my industrial wastewater have for discharge into the sewage system?

In general, the parameters to be met are as follows:

ParameterFormulaMaximum allowable level*
Biochemical Oxygen Demand after 5 daysBOD5500 mg/L
Chemical Oxygen DemandCOD1000 mg/L
Total Suspended SolidsTSS500 mg/L
Total phosphorusP Total15 mg/L
Total nitrogenN Total50 mg/L
* Indicative data, may vary according to the corresponding jurisdiction.

In addition, other parameters such as sulfate levels, heavy metals, grease, toxicity, pesticides and hydrocarbons are also monitored.

BIOBOX Solution

At BIOBOXWATER S.L., we understand the importance of proper treatment of industrial wastewater. As specialists in effluent treatment, we offer compact water treatment plants with customized solutions to help companies comply with regulations and responsibly manage their wastewater.

Contact us for more information and to request a quote tailored to your specific needs.