Public Sewer Discharge Permit
Preliminary inspections and other guidelines such as the amount of flow, impacting characteristics of the wastewater, type of process, and regulations are taken into consideration to determine if a business is required to have a Public Sewer Discharge Permit.
Public Sewer Discharge Permits are issued (but not limited) to:
Food Packing Plants
Food Processors & Mfg
Fuel Service Stations
Elderly care homes
Vehicle mechanics/panel beaters/sprayers
Petroleum products storage & processing
Injection moulding facilities
Electronics Mfg plants
Permits to discharge into the sewer contain a series of administrative requirements and discharge conditions that the users must comply with at all times. Permits are given for a one year period, are tailored to each user with applicable conditions and are not renewed automatically.
Click here for more information about sewage treatment considerations and requirements.
Keeping Harmful Substances Out
The goal of applying for and obtaining a Public Sewer Discharge Permit is to keep harmful substances out that could:
•Damage sewer systems (through blockages), pumps and treatment plant structures;
•Interfere with biological treatment process operations;
•Jeopardize worker safety by exposure to chemical hazards;
•Reduce reusability potential of New Water due to contaminated effluent and issues with acceptability of biosolids when landfilling;
•Result in violations of the treatment facilities’ own Waste Discharge Requirements imposed by the Environmental Permits issued by ERA;
•Add maintenance, repair, operational and disposal costs to the treatment of wastewater;
Trade effluent generated by industrial entities generally requires some form of treatment. This can range from a simple sedimentation tank to a fully fledged biological treatment plant as illustrated below:
Treatment of Catering wastewaters
Any catering establishment that prepares food must have a grease trap in order to retain the fats and greases released during washing of pots, pans and other tableware.
There are 3 principal types of grease traps:
Prohibited equipment/treatment systems
The following items are prohibited from being used:
Wastewater macerating pumps (for non-domestic use)
How to apply
The fee is applicable only for new applications or other applications that are not renewals (amendment of permit). Secondly, for a new application, we ask the applicants for the following documentation including:
•site plans, internal drains layouts, Material Safety Data Sheets, and any operational permits/licenses the applicant holds with other authorities (such as MTA);
•In case of renewals we also ask for receipts of maintenance/cleaning of treatment facilities and also waste transfer receipts for the movement of wastes which are not authorised to be discharged to sewer;
As part of the permitting process, the entities may also be asked for an analysis of the trade effluent. Sampling guidelines are imposed by the DPU following the review of the documentation submitted and the on-site inspection/s.
At the end of the process, the DPU will issue the permit for a period of one year which is not renewed automatically. Industrial entities are advised to send their application for renewal of their permit at least one month before expiry.
Regulations are enforced through actions that could escalate from simple Warning Notices to Criminal Court Cases if discharges constitute a public health and safety issue. Compliance through pollution prevention measures instead of enforcement actions is highly preferred. Increasing facility inspections by DPU inspectors have played an active role in improving the visibility of the legal requirement to obtain a Public Sewer Discharge Permit and also enhanced communication with the various industries and the overall number of permits compliance rate in the last four years.
Planning Applications initial vetting / Clearances
The DPU is also responsible for the vetting of industrial planning applications. If you require clearance from WSC relating to industrial applications you can send a formal request to the following email address: firstname.lastname@example.org. For other clearances, kindly send a request on the following email address: email@example.com. Kindly submit a site plan and also plans relating to the internal sewer and stormwater runoff systems.
In doubt? Contact DPU
If you need further information about discharge of waste waters into sewer, you can contact the Discharge Permit Unit by phone on 2244 3184 or by e-mail on firstname.lastname@example.org