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Quality Assurance Project Plan: Sampling of Pretreated Industrial Wastewater in Northwestern Washington State

Publication number Date Published
20-03-119November 2020
VIEW NOW Quality Assurance Project Plan: Sampling of Pretreated Industrial Wastewater in Northwestern Washington State (Number of pages: 53) (Publication Size: 1027KB)

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Author(s) Wong, S.
Description The objective of this project is to analyze a suite of conventional and toxic chemicals in samples collected from pretreated wastewater from industrial facilities in the Puget Sound region. The selected facilities operate under State Waste Discharge permits to discharge pretreated wastewater to a publicly owned treatment works (POTW). The Washington State Department of Ecology will visit each facility once to collect water samples.

The first purpose of this project is to conduct compliance monitoring required under the National Pretreatment Program, a component of the National Pollutant Discharge Elimination System (NPDES) program. The second purpose is to screen for supplemental parameters that are not required to be monitored in order to advance research on chemicals of emerging concern (CECs) and other lesser studied chemicals. These pollutants can make their way to POTWs and, ultimately, to the Puget Sound. The supplemental parameters include organophosphate flame retardants (OPFRs), per- and poly-fluoroalkyl substances (PFAS), phenolic compounds, polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), and semivolatile organic compounds (SVOCs).

This project supports efforts to protect and improve water quality in the Puget Sound, which plays a vital role in maintaining the region’s ecological and economic health.
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.

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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.
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Contact Siana Wong at 360-407-6764 or
Keywords pretreatment, wastewater treatment plant, toxics monitoring, wastewater, water quality
DATA Environmental Information Management (EIM) #SWON0002


Chemicals of Emerging Concern in Pretreated Industrial Wastewater in Northwestern Washington State: Screening Study Results, 2021