WEMSIS Data and Reports

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Active agency reporting statistics as of September 8, 2026

Overall EMS Reporting

EMS Agencies Reporting to WEMSIS - 406 (89%)

Total number of EMS Agencies - 453

Estimated total response volume captured in WEMSIS - 98%

Transport Agencies

Active Transport Agencies Reporting to WEMSIS - 304 (96%)

Total number of Active Transport Agencies - 317

Estimated transport response volume captured in WEMSIS - 99%

Non-Transport Agencies

Active non-Transport Agencies Reporting to WEMSIS - 102 (74%)

Total number of Active non-Transport Agencies - 136

Estimated non-transport response volume captured in WEMSIS - 88%

WEMSIS Reports

WEMSIS Data quality report

WEMSIS Data Quality Report

The purpose of the WEMSIS data quality report is to engage data providers and stakeholders in our efforts to improve data quality. This document provides a statewide level report on the completeness of WEMSIS data elements that the WEMSIS assessment staff has identified as priority data elements. We anticipate to update and post this completeness report on a quarterly basis so that we can monitor data quality improvement over time.

WEMSIS Key Performance Indicators (KPI) reports

This is a report of the state's Emergency Medical Services (EMS) key performance indicators (KPIs). Its purpose is to provide Washington state EMS providers with an overview of performance as measured by the state's EMS KPIs. The information presented should be used to identify strengths and opportunities for improvement related to the service and care provided to different groups of EMS patients. It should also be used to engage data providers and software vendors in discussions about systemwide data quality needs.

Opioid Overdose Surveillance Report

The Emergency Medical Services Opioid Overdose Surveillance Report provides monthly information on opioid related responses by ambulance and aid services who submit data to WEMSIS.

2026
2025
2024

Additional Reports

Washington State Annual EMS Opioid Reports