Utility Services

Pretreatment

Pretreatment Program

Authorized by the Clean Water Act (CWA) of 1972, the National Pollutant Discharge Elimination System (NPDES) identifies and regulates discharges from point sources such as publicly owned treatment works (POTWs), otherwise known as sewage treatment plants or water reclamation facilities, as well as non-point sources such as stormwater runoff from streets.  The Nevada Division of Environmental Protection (NDEP) regulates discharges from the City’s two water reclamation facilities through a NPDES permit.  The City of Henderson is mandated by the CWA and the NPDES permit to develop and implement a Pretreatment Program to regulate the discharge of industrial waste to its two POTWs, the Kurt R. Segler Water Reclamation Facility and the Southwest Water Reclamation Facility.  The primary goals and objectives for the Pretreatment Program are to 1) prevent the introduction of pollutants to the POTW that will cause pass through or interference with the collection and/or treatment processes, 2) protect POTW personnel, the general public and the environment, and 3) improve opportunities to reuse and recycle treated wastewater and sludge.  The regulatory requirements of a Pretreatment Program are identified in the Code of Federal Regulations (CFR) Title 40 Part 403 and the Henderson Municipal Code (HMC) 14.09.

Pretreatment Program Functions

  • Industrial User Identification and Classification
    Pretreatment maintains an Industrial Waste Survey to identify industrial users that require regulatory oversight.  The Pretreatment Program works with the Business Licensing and Building and Fire Safety Certificate of Occupancy inspection process to identify new or prospective businesses that may require this type of regulatory oversight.
  • Permitting and Enforcement
    Industrial Users that pose an elevated risk to the POTW or are classified in the federal regulations as a Significant Industrial User or Categorical Industrial User are required to complete a Waste Discharge Authorization Application.  These permits define the facility’s responsibilities and obligations, establish sampling and reporting requirements, and set limits for allowable pollutant discharge concentrations.  The City’s enforcement process for non-compliance with permit requirements is set forth in HMC 14.09.170 and the Pretreatment Enforcement Response Plan.
  • Compliance Sampling and Inspections
    Sampling is used to determine the compliance status of an Industrial User.  Inspections are used to collect and/or update changes in staffing or operations, review the facility’s compliance history, identify hazards and ensure adequate protection, and identify opportunities for improvement.
  • Complaint Investigations
    Pretreatment investigates illicit discharges and odor issues.  To report a complaint or other concern please use Contact Henderson.
  • Fats, Oils, and Grease (FOG)
    Fats, oils, and grease (FOG) are known to accumulate in the sewer collection system and can cause blockage and odor issues.  Commercial food service establishments are required to prevent the discharge of fats, oils and grease into the sewer collection system.  The most common FOG pretreatment device is the gravity grease interceptor (GGI), however other types of devices can be used under certain circumstances to prevent the discharge of FOG into the sewer.
  • Dental Amalgam Program
    Mercury is a potent neurotoxin that bioaccumulates in the environment.  Silver colored amalgam dental fillings are made up of a mixture of metals which contains mercury.  When improperly disposed or washed down a drain, amalgam waste from dental practices is a significant source of mercury releases to the environment.  In an effort to reduce the amount of mercury released into the environment, the Environmental Protection Agency (EPA) promulgated 40 CFR 441 (Dental Office Point Source Category).  All dental practices are required to submit a one-time Dental Practice Inventory and Certification Form.
  • Surcharge for High Strength Waste
    A surcharge is assessed to Significant Industrial Users that discharge high strength waste which is waste that has a high biological oxygen demand (BOD) or contains high concentrations of total suspended solids (TSS).  The surcharge rates are identified in the Department Service Rules.
  • Public Outreach/Education
    Increase awareness for commercial and residential customers through coordinated marketing efforts with Clark County Water Reclamation District's Pain in the Drain campaign.

Contact Pretreatment

If you have any questions, comments, or concerns regarding the Pretreatment Program or the applicable regulations or requirements, please contact Pretreatment or submit a Contact Henderson case.

City of Henderson
ATTN: Pretreatment
PO Box 95050, MSC 814
Henderson, Nevada 89009-5050
Office: (702) 267-2603
COHPT@cityofhenderson.com
Hours: Monday - Friday, 6:00 a.m. - 4:00 p.m.

11/2020