Publications Home || Browse by topic || Browse by program || Ecology website

Publication Summary

Our Ecology website has changed, which can cause broken links.
To report these, please contact us with the publication and broken link.


Ceilometer Standard Operating Procedure

Publication number Date Published
21-02-020August 2021
VIEW NOW Ceilometer Standard Operating Procedure (Number of pages: 20) (Publication Size: 732KB)

Trouble viewing? Try these free options.
Author(s) James Laing
Description This standard operating procedure describes the requirements and guidance for operating Vaisala CL51 Ceilometers (Figure 1) for Measuring Mixing Height within the Washington State Ambient Air Monitoring Network (Washington network). The Mixing Height Layer (MHL) is the height of the layer adjacent to the ground over which pollutants or any constituents emitted within this layer or entrained into it become vertically dispersed by convection or mechanical turbulence. One hour Mixing Height Layer is a required parameter for the U.S. Environmental Protection Agency (EPA) Photochemical Assessment Monitoring Stations (PAMS) Required Site network.
The mission of the Department of Ecology is to protect, preserve, and enhance Washington’s environment. To help us meet that goal, please consider the environment before you print or request a copy.

ADA Accessibility
The Department of Ecology is committed to providing people with disabilities access to information and services by meeting or exceeding the requirements of the Americans with Disabilities Act (ADA), Section 504 and 508 of the Rehabilitation Act, and Washington State Policy #188.
Visit Ecology’s website for more information.
Contact James Laing at 425-531-5651 or
Keywords ceilometer, PAMS, air quality, air monitoring, SOP, Standard Operating Procedure
WEB PAGE Information for air monitoring professionals