The City of Roseville's Industrial Waste Division works with businesses to help ensure wastewater is safely discharged into the sewer system. Our team oversees discharge requirements, issues permits and helps protect Roseville’s wastewater system and the environment.
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Industrial pretreatment

The Industrial Pretreatment Program (IPP) protects the City’s sewer system, wastewater treatment facilities, public health, and the environment from harmful industrial waste. The program follows federal requirements included in the City’s wastewater permits.

It applies to industrial customers that discharge wastewater into the sanitary sewer system in Roseville and surrounding areas, including Rocklin, Granite Bay, southern Lincoln, Penryn, Loomis, Newcastle, and unincorporated Placer County.

Depending on their operations, industrial customers may be required to sample their wastewater, participate in routine City inspections, and obtain a wastewater discharge permit from the City’s Industrial Waste Division.
  1. What is the Industrial Pretreatment Program?
    It’s a regulatory initiative under Environmental Utilities that controls industrial and high strength wastewater discharge to protect sewer systems and wastewater treatment plants.
  2. Do I need a permit to discharge wastewater?
    If your business or industry discharges anything other than sanitary or domestic wastewater, your business might need a wastewater discharge permit. Please complete the Wastewater Discharge Survey form. This form will help City of Roseville Industrial Waste staff determine if a Wastewater Discharge Permit is required.
  3. What is a Significant Industrial User (SIU)?
    An SIU is defined as a facility that meets any of the following criteria:
    • A categorical industrial user (CIU) facility subject to national categorical pretreatment standards (40 CFR 405-471)
    • A facility that discharges an average of 25,000 gallons per day or more of wastewater to the sanitary sewer on any given day.
    • A facility that contributes a wastewater flow which makes up five percent or more of the average dry weather hydraulic or organic capacity of the wastewater facility is designated as such by the City on the basis that the Industrial User has a reasonable potential for adversely affecting the WWTP or the sewer system.
  4. What are categorical industrial users?
    Categorical industrial users are facilities that are subjected to federal regulations set forth by the EPA due to specific business practices conducted at the business and need to follow national categorical standards and reporting requirements.
  5. What does a wastewater discharge permit cover?
    The wastewater discharge permit specifies sources of discharge, volume limitations, pollutant limitations, sampling and monitoring frequencies, and reporting requirements.
  6. What are the inspection frequencies?
    Permitted users are inspected at least annually and non-permitted users are inspected at a frequency of one to five years.
  7. Who do I report spills to the sewer?
    Please report spills to the sewer to the Industrial Waste division at IW@roseville.us.ca or (916) 746-1882.
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Commercial dischargers

The Commercial Discharge Program (CDP) protects the City’s sewer system, wastewater treatment facilities, public health, and the environment from waste discharged by smaller commercial businesses.

The program applies to businesses such as car washes, dental offices, machine shops, breweries, and printing facilities that discharge more than sanitary waste into the sewer system.

These businesses do not need a City discharge permit, but they must follow Roseville Municipal Code requirements and may be periodically inspected by City staff.
  1. What is the purpose of the Commercial Discharger Program?
    The purpose of the CDP is to protect the City’s sanitary sewer system infrastructure by preventing blockages, and excessive discharges of pollutants from Commercial Dischargers.
  2. What types of businesses are subject to the Commercial User Discharger Program?
    The type of businesses covered under the CDP include but are not limited to car washes, dental offices, machine shops, breweries, and printing facilities that discharge nondomestic wastewater into the sewer system.
  3. What is non-domestic wastewater?
    Non-domestic wastewater is waste generated by businesses, industries, or commercial facilities. Non-domestic wastewater often contains pollutants that differ from residential wastewater, which could include increased concentrations of chemicals, pollutants, or high-strength waste.
  4. Do I need a wastewater discharge permit?
    The businesses that are under the CDP are not required to obtain discharge permits through the City but are required to comply with requirements outlined in the Roseville Municipal Code and are subject to periodic inspection by City staff.
  5. Am I required to maintain my pretreatment device?
    Yes, pretreatment devices shall be maintained in efficient operating condition by periodic removal of the full content of the device, which includes wastewater, accumulated oil, grease, floating materials, sludge and solids.
  6. What is a pretreatment device?
    A pretreatment device is any equipment or system installed to treat pollutants before they are discharged into the City’s sanitary sewer system. Common examples include sand/oil interceptors at car washes, amalgam separators at dental offices, and pH‑neutralization systems at breweries.
  7. Who do I report spills to the sewer?
    Please report spills to the sewer to the Industrial Waste division at IW@roseville.us.ca or (916) 746-1882.
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Dental offices

Dental offices must properly manage wastewater containing mercury amalgam from dental procedures. Federal regulations require offices to install amalgam treatment devices and confirm whether the requirements apply to their practice.

Dental offices must submit a One-Time Compliance Report to the City for review and approval. They may also be periodically inspected to confirm compliance with federal regulations and the Roseville Municipal Code.
  1. Who is subject to this rule?
    A facility where the practice of dentistry is performed, including, but not limited to, institutions, permanent or temporary offices, clinics, home offices, and facilities owned and operated by federal, state or local governments, that discharges amalgam process wastewater to the sewer system. These facilities must install an approved amalgam separator.
  2. Who is exempt from the rule?
    • A dental office that exclusively practices one or more of the following dental specialties: oral pathology, oral and maxillofacial radiology, oral and maxillofacial surgery, orthodontics, periodontics, or prosthodontics.
    • A mobile unit operated by a dental practice discharging amalgam process wastewater.
    • A Practice of Dentistry that does not place dental amalgam and does not remove amalgam except in limited emergency or unplanned, unanticipated circumstances (<5%).
  3. What are the dental rule requirements?
    The ruling has mandated the use of an amalgam separator, the implementation of best management practices (BMPs) and requires dental offices to certify whether they are or are not applicable to the ruling.
  4. What are the Best Management Practices (BMPs)?
    • Dental practices are prohibited from discharging waste amalgam including, but not limited to, dental amalgam from chair-side traps, screens, vacuum pump filters, dental tools, cuspidors, or collection devices to the sewer system.
    • Dental unit water lines, chair-side traps, and vacuum lines that discharge amalgam process wastewater to the sewer system must not be cleaned with oxidizing or acidic cleaners, including but not limited to bleach, chlorine, iodine and peroxide that have a pH lower than 6 or greater than 8.
  5. What is a Dental One-Time Compliance Report?
    The Dental One-Time Compliance Report (OTCR) is a mandatory form that dental facilities must submit to the City of Roseville’s Industrial Waste Division. The OTCR certifies whether the dental ruling is applicable to the dental facility.
  6. Where do I submit the One-Time Compliance Report (OTCR)?
    The OTCR must be submitted to the City of Roseville’s Industrial Waste Division at: 1800 Booth Rd, Roseville, CA 95747. A hard copy of the OTCR with a wet signature must be submitted to the above address. The OTCR must be in a hardcopy format with a wet ink signature.
  7. Are there any record keeping requirements?
    Dental offices must maintain a copy of the OTCR, applicable waste hauling manifest, and any maintenance records. These documents must be available for inspection in either physical or electronic form, for a minimum of three years.
  8. What happens if there is a change in ownership?
    Since the one-time compliance report is non-transferrable, the new owner must submit a new One-time Compliance report within 90 days after transfer.
  9. What if I am exempt from the dental rule, but still maintain an amalgam separator?
    If an exempt dental office installs an amalgam separator, the hauling manifests and maintenance records must be kept for a minimum of three years and be available during an inspection.
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Temporary discharge permits

Temporary discharge permits are required for activities such as construction site dewatering, groundwater pumping, or special remediation activities that wish to discharge wastewater to the sanitary sewer system. These discharges are required to be permitted through the City’s Industrial Waste Division in which permits are issued for no longer than a 12 month period.
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Building permit applicant

Before you submit your permit, make sure your wastewater information is covered. Industrial and commercial facilities that discharge wastewater to the City’s treatment plants are required to report what they send into the system. This step helps protect operations, meet environmental regulations, and keep services reliable for the community.
Industrial and commercial facilities that discharge wastewater to the City of Roseville’s treatment plants are required to provide information about the quantity and quality of their discharge.

To streamline this process, building permit applicants must complete the appropriate wastewater compliance form and submit it to the Roseville Building Department through the Online Permitting Services (OPS) Portal with their permit application.

Find your requirement
Industrial and commercial facilities: Complete the Wastewater Discharge Survey Form.
Dental facilities: Complete the Dental One-Time Compliance Report.
Certain businesses fall under regulated industrial categories that require monitoring because their wastewater may pose a higher risk to treatment operations.

Questions? Contact the Industrial Waste Division at (916) 746-1882 or email us here.


Contact Us

Have questions about the Industrial Waste Programs? Contact our team for assistance.

Email: IW@roseville.ca.us
Phone: 916-746-1882