Class Code 7580
Sanitary Or Sanitation Districts Operation
Class Code 7580 covers operation and maintenance activities performed by sanitary or sanitation districts in California, including wastewater collection, treatment, and disposal support functions. The approved pure premium rate for Sept 1, 2026 is $3.631 per $100 of payroll, which is the WCIRB base used to price workers' compensation exposure for these operations.
What Class Code 7580 Covers
This classification applies to public or quasi-public entities that operate sanitary or sanitation districts, wastewater treatment plants, sewage pumping stations, and collection systems. It includes employees who operate and maintain treatment process equipment (clarifiers, aeration basins, digesters), crews that inspect and clean sewer mains and manholes, personnel who handle biosolids and sludge, and staff who perform routine laboratory sampling and process control testing. The class also covers maintenance mechanics and electricians assigned to plant equipment, and drivers who transport sludge or chemical supplies as part of district operations. Activities excluded are unrelated municipal operations (e.g., street maintenance) unless employees are specifically assigned to sanitation duties.
Who It Applies To
- Municipal or regional sanitary/sanitation district employees
- Wastewater treatment plant operators and process control technicians
- Sewer collection system maintenance crews and manhole crews
- Maintenance mechanics, electricians, and instrumentation technicians at treatment plants
- Biosolids/sludge haulers and drivers employed by the district
- Laboratory technicians performing effluent and compliance testing
Common Job Duties
- Operating pumps, blowers, clarifiers, centrifuges and other treatment process equipment
- Entering and inspecting manholes, wet wells and confined spaces for maintenance or repairs
- Cleaning, rodding and high-pressure jetting of sewer mains and grease traps
- Sampling and laboratory analysis of influent, effluent and biosolids for regulatory compliance
- Repairing and maintaining valves, motors, gears, pipes and electrical controls
- Collecting, dewatering and transporting sludge or biosolids to disposal or reuse sites
- Performing preventative maintenance, equipment calibration and process control adjustments
Common Injury Risks
Understanding the $3.631 Rate
The pure premium rate of $3.631 per $100 of payroll is the WCIRB-approved charge that represents expected claim costs before insurer loadings and adjustments. To calculate the base premium, multiply payroll for employees in Class Code 7580 by this rate and divide by 100; carriers then add expense, profit, and may apply experience modification, schedule credits or debits. Final premium is affected by your district's loss history (experience modification), class splits (how payroll is allocated among codes), deductible programs, and any state or insurer-specific rating programs.
Cal/OSHA Compliance Requirements
Cal/OSHA standards most relevant to sanitation districts include permit-required confined space entry procedures and training, the Bloodborne Pathogens standard, Hazard Communication for treatment chemicals, Respiratory Protection, and control of hazardous energy (lockout/tagout) during maintenance. Employers must maintain written programs (confined space, HAZCOM, respiratory protection), provide fit-tested respirators when required, and document employee training and exposure monitoring to meet California requirements and avoid citations.
How Key HR Helps Employers Under Class Code 7580
A PEO like Key HR can help sanitation districts ensure correct classification of employees into Class Code 7580, implement and document required safety programs (confined space, HAZCOM, respiratory protection), and deliver targeted training to reduce incidents. Key HR also provides centralized claims management, return-to-work coordination, and loss-control consulting to drive down experience modification and overall workers' comp cost for sanitation operations.
Get a QuoteFrequently Asked Questions
How do I know if my employees should be assigned to Class Code 7580?
If employees are primarily engaged in operating or maintaining wastewater collection and treatment systems, entering manholes or confined spaces for sewer work, handling biosolids, or performing lab testing for a sanitary district, they belong in 7580. Non-sanitation municipal work should be coded separately; accurate payroll allocation is important for correct premium.
What specific safety trainings are required for workers in this class?
Essential trainings include permit-required confined space entry procedures and rescue planning, bloodborne pathogen awareness, Hazard Communication for chemicals used in treatment, respiratory protection and fit testing where gas exposure is possible, and lockout/tagout for equipment servicing. Training must be documented and repeated per Cal/OSHA intervals.
Can proper safety programs reduce my workers' comp costs under this class code?
Yes. Effective loss-control measures—confined-space programs, routine gas monitoring, PPE use, preventive maintenance, and early return-to-work—reduce claim frequency and severity, which lowers your experience modification and final premium. A PEO can help implement these programs and track outcomes to achieve measurable savings.
Quick Facts
- Class Code
- 7580
- Classification
- Sanitary Or Sanitation Districts Operation
- Pure Premium Rate
- $3.631 / $100 payroll
- Effective Date
- September 1, 2026
- Source
- WCIRB Approved Filing
Manage Workers' Comp Through a PEO
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