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Employee Investment - PUASEI

City of Portland

OSHA incidence rate

Current Value

5.17

2025

Definition

TRIR  is an OSHA and BOLI recognized methods of standardizing OSHA recordable injury information for industries to compare their information. 

The formula to calculate TRIR is:      Number Of Recordable Injuries X 200,000

                                                                  Total hours worked by employees

Why Is This Important?

These rates are important because they help provide a picture of the overall safety of our workforce. Low rates are most desirable.This is a lagging indicator that helps us evaluate the effectiveness of our safety programs and guide actions when problems are identified. Knowing our TRIR (OSHA-incidence rate) also allows us to compare our safety performance with other industries like ours.

What Do The Numbers Show?

The TRIR measures the frequency of OSHA recordable incidents, standardized per 100 full-time employees.  The TRIR is the place we look to measure the volume of OSHA recordable incidents and compare against our past data and others in industries like ours. Increasing rates experienced at the Water Bureau over the past few years are generating important dialog about injury prevention programs at all levels of the organization

How Did We Arrive at These Numbers?

TRIR  is an OSHA and BOLI recognized methods of standardizing OSHA recordable injury information for industries to compare their information. 

The formula to calculate TRIR is:      Number Of Recordable Injuries X 200,000

                                                                  Total hours worked by employees

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