Industrial Wastewater Program

MassDEP regulates industrial wastewater to protect our water resources.

MassDEP regulates the discharge, treatment and storage of industrial wastewater to preserve and protect inland and coastal surface waters, groundwater, and sewer systems.

Standard Industrial Classification (SIC) Codes -

MassDEP's Industrial Wastewater regulations apply to businesses and facilities with the following Standard Industrial Classification (SIC) Codes:

1000-1399 Metal Mining, Coal Mining, Oil & Gas Exploration

1474-1499 Chemical/Fertilizer Mining, Nonmetallic Minerals

2000-3999 Manufacturing

4231 Maintenance Facilities for Motor Freight Transport

4581 Airports, Flying Fields & Airport Terminal Service

4911-4939 Electric and Gas Production

4953 Refuse Systems

7216 Drycleaning (except rug cleaning)

7217 Carpet & Upholstery Cleaning

7218 Industrial Laundries

7384 Photofinishing Laboratories

7532-7539 Automotive Repair Shops & Paint Shops

7549 Automotive Services

7819 Motion Picture Developing /Printing/Film Processing

8062-8069 Hospitals

8071 Medical Laboratories

8072 Dental Laboratories

8731 Commercial Physical & Biological Research

Industrial wastewater may not be discharged to conventional septic systems, innovative/alternative (I/A) systems or cesspools except if approved by MassDEP under 310 CMR 15.004(4). On-site discharges of industrial wastewater must be to industrial wastewater holding tanks and containers.

If a discharge of industrial wastewater to an on-site system is being discontinued, the owner must not only comply with MassDEP requirements for holding tank and containers, but also must notify the agency's Underground Injection Control Program of the closure


Policies & Guidance

Permits & Forms

WP 56: Industrial Wastewater Holding Tank Compliance Certification
Owner/operators of holding tanks, mobile tanks and containers used for non-hazardous, non-sanitary wastewater need to file one-time certifications.

WP 91, 92: Permit for Industrial Sewer User
Specific industrial facilities that discharge wastewater to Publicly Owner Treatment Works (POTWs) need to obtain sewer connection permits

Dry Cleaners
Annual certification forms and instructions for dry-cleaning facilities.

Photo Processors
Annual certification forms and instructions for photo-processing facilities.

Additional Resources

Contact   for Industrial Wastewater Program

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